Petter Nekså

About

Refrigeration and heat pump technology in general · System design for refrigeration; air conditioning and heat pumps · CO2 technology for various applications · Low temperature refrigeration; liquefaction and gas processing (LNG; LH2; LCO2…) · Compressor and heat exchanger technology · Working fluids; with emphasis on natural working fluids · Power cycles for utilisation of low to medium temperature heat · Low temperature processes for CO2 capture; AGR and CCS · Energy systems and energy efficiency related issues in general;

Publications

2023

Voldsund, Mari; Reyes Lua, Adriana; Fu, Chao; Ditaranto, Mario; Nekså, Petter; Mazzetti, Marit Jagtoyen; Brekke, Olaf; Bindingsbø, Arne Ulrik; Grainger, David; Pettersen, Jostein. (2023) Low carbon power generation for offshore oil and gas production. Energy Conversion and Management: X. volum 17.
Academic article

2022

Abdelaziz, Omar; Carvalho, Suely; Woodcock, Ashley; Agyarko, Kofi; Altoé, Paulo; Bhambure, Jitendra; Colbourne, Daniel; Dohnt, Hilde; Dreyfus, Gabrielle; Elassaad, Bassam; Gluckman, Ray; Hamed, Samir; Herlianika, Herlin; Kujak, Steven; Kumar, Saurabh; Li, Tingxun; Lord, Richard; Nekså, Petter; Okada, Tetsuji; Olama, Mohamed Alaa; Peixoto, Roberto; Shah, Nihar; Rajendran, Rajan; Rochat, Helene. (2022) Montreal protocol on substances that deplete the ozon layer: report of the Technology and Economic Assessment Panel. Volume 3: Decision XXXIII/5 - Continued provision of information on energy-efficient and low-global-warming-potential technologies. United Nations Environment Programme. 2022. ISBN 978-9966-076-95-3.
Report
Berstad, David Olsson; Skaugen, Geir; Roussanaly, Simon; Anantharaman, Rahul; Nekså, Petter; Jordal, Aina Benedikte Kristin; Trædal, Stian; Gundersen, Truls. (2022) CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation. Energies. volum 15 (2).
Academic article
Cely, Alexandra; Hammer, Morten; Andersen, Hilde; Yang, Tao; Nekså, Petter; Wilhelmsen, Øivind. (2022) Thermodynamic Model Evaluations for Hydrogen Pipeline Transportation. SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition.
Academic chapter/article/Conference paper
Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
Academic chapter/article/Conference paper
Hagen, Brede Andre Larsen; Andresen, Trond; Nekså, Petter. (2022) Equation-oriented methods for optimizing Rankine cycles using radial inflow turbine. Energy. volum 252.
Academic article
Nekså, Petter. (2022) Bør jeg kjøpe varmepumpe? Vil det lønne seg?.
Website (informational material)
Nekså, Petter. (2022) Vis oss varmepumpa di, så skal vi si om du bruker den rett. Adresseavisen.
Feature article
Perez Clos, Daniel; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2022) Composition and Structure Analysis of Hard Grey Scale (HGS) Formed on Cold Surfaces Exposed to Aluminium Production Off-gas. JOM. volum 74 (9).
Academic article
Røkke, Petter Egil; Kauko, Hanne; Nekså, Petter. (2022) Industrial neighbours can share excess energy.
Website (informational material)
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2022) Performance of binary zeotropic mixtures in organic Rankine cycles (ORCs). Energy Conversion and Management. volum 266.
Academic article
Yamaguchi, H.; Ishikawa, Yuki; Yamasaki, Hiroshi; Kamimura, Takeshi; Hattori, K; Nekså, Petter. (2022) Ultra-low temperature refrigeration system of CO2 using cyclone separator/evaporator. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
Academic chapter/article/Conference paper
Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter; Yamaguchi, Hiroshi. (2022) Visualization and Measurement of Swirling Flow of Dry Ice Particles in Cyclone Separator-Sublimator. Energies. volum 15 (11).
Academic article

2021

Abdelaziz, Omar; Elassaad, Bassam; Bhambure, Jitendra; Kuijpers, Lambert J.M.; Nekså, Petter; Pachai, Alexander C.; Peixoto, Roberto; Polonara, Fabio; Rajendran, N.. (2021) Montreal Protocol on Substances that Deplete the Ozone Layer : Report of the Refrigeration Technical Options Committee Vaccines Cold Chain Subcommittee Addendum to the TEAP 2021 Progress Report. United Nations Environment Programme. 2021. ISBN 978-9966-076-90-8.
Report
Berstad, David Olsson; Gardarsdottir, Stefania Osk; Roussanaly, Simon; Voldsund, Mari; Ishimoto, Yuki; Nekså, Petter. (2021) Liquid hydrogen as prospective energy carrier: A brief review and discussion of underlying assumptions applied in value chain analysis. Renewable & Sustainable Energy Reviews. volum 154.
Academic article
Clos, Daniel Perez; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2021) Particle deposition characteristics in the formation of Hard Grey Scale (HGS) on cold surfaces exposed to aluminium production off-gas. Journal of Aerosol Science. volum 161.
Academic article
Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th IIR Conference on Compressors and Refrigerants.
Academic chapter/article/Conference paper
Gardarsdottir, Stefania Osk; Nekså, Petter. (2021) Assumptions Matter When Assessing Blue & Green Hydrogen.
Website (informational material)
Hagen, Brede; Agromayor, Roberto; Nekså, Petter. (2021) Equation-oriented methods for design optimization and performance analysis of radial inflow turbines. Energy. volum 237.
Academic article
Røkke, Petter Egil; Kauko, Hanne; Nekså, Petter. (2021) Industrinaboer kan dele overskuddsenergi.
Website (informational material)
Røkke, Petter Egil; Nekså, Petter. (2021) Episode 393 – Om varmetap med Petter Røkke og Petter Nekså. Teknisk ukeblad. 2021.
Sound material
Singh, Simarpreet; Hafner, Armin; Maiya, M.P.; Banasiak, Krzysztof; Nekså, Petter. (2021) Multiejector CO2 cooling system with evaporative gascooler for a supermarket application in tropical regions. Applied Thermal Engineering. volum 190.
Academic article

2020

Andresen, Trond; Lingaas, Simon Johan Nilsen; Hagen, Brede; Nekså, Petter. (2020) Dynamic Analysis of Energy Recovery Utilizing Thermal Storage from Batch-Wise Metal Casting. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Clos, Daniel Perez; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2020) The Effect of Hard Scale Deposition on the Wall Heat Flux of a Cold Finger. Light Metals 2020.
Academic chapter/article/Conference paper
Dasi, Koti; Singh, Simarpreet; Guruchethan, A.M.; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2020) Performance Evaluation of Ejector Based CO₂ System for Simultaneous Heating and Cooling Application in an Indian Dairy Industry. Thermal Science and Engineering Progress. volum 20.
Academic article
Hagen, Brede; Cavo, Matteo; Andresen, Trond; Nekså, Petter. (2020) Gradient Based Design Optimization of a Radial Inflow Turbine. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Ishimoto, Yuki; Voldsund, Mari; Nekså, Petter; Roussanaly, Simon; Berstad, David Olsson; Gardarsdottir, Stefania Osk. (2020) Large-scale production and transport of hydrogen from Norway to Europe and Japan: Value chain analysis and comparison of liquid hydrogen and ammonia as energy carriers. International Journal of Hydrogen Energy. volum 45 (58).
Academic article
Nekså, Petter. (2020) How CO2 Can Help The Climate. SINTEF Energi AS. 2020.
Multimedia product
Nekså, Petter. (2020) Hydrogen can contribute to decarbonizing the European energy system. SINTEF Energi. 2020.
Multimedia product
Nekså, Petter. (2020) Norsk teknologi kan kutte 0,5 grader global oppvarming!. SINTEF Energi. 2020.
Multimedia product
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2020) Effect of Waste Heat Utilization on the Performance of Low Temperature Rankine Cycle. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Singh, Simarpreet; Maiya, Prakash; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2020) Energy efficient multiejector CO2 cooling system for high ambient temperature. Thermal Science and Engineering Progress. volum 19.
Academic article
Skjervold, Vidar T.; Skaugen, Geir; Andresen, Trond; Nekså, Petter. (2020) Enabling Power Production from Challenging Industrial Off-Gas – Model-Based Investigation of a Novel Heat Recovery Concept. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Tazawa, Taluya; Yoshida, S; Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Thermal Characteristics in Supercritical CO2 Along Heating Tube. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Wakimoto, Hiroko; Uchi, K.; Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuyuki; Nekså, Petter. (2020) Basic performance of CO2 cyclone refrigeration system. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Wakimoto, Hiroyuki; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter; Yamaguchi, Hiroshi. (2020) Dry-ice collection performance and collection mechanism of cyclone separator-evaporator. 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2020).
Academic article
Yamasaki, Haruhiko; Kizilkan, Ônder; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Experimental investigation of dry ice cyclone separator for ultra‐low temperature energy storage using carbon dioxide. Energy Storage. volum 2 (4).
Academic article
Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Yamaguchi, Hiroshi; Nekså, Petter. (2020) Solar heat recovery system using CO2 as working fluid. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Kizilkan, Ônder; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects.
Academic article

2019

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2019) Experimental investigation of a prototype R-600 compressor for high temperature heat pump. Energy. volum 169.
Academic article
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2019) The development of a hydrocarbon high temperature heat pump for waste heat recovery. Energy. volum 173.
Academic article
Banasiak, Krzysztof; Singh, Simarpreet; Hafner, Armin; Maiya, Prakash; Nekså, Petter; Pardiñas, Ángel Á.. (2019) Experimental investigation of CO2 systems for Indian supermarkets with parallel configuration of multiejectors (INDEE). Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2019) Investigation on scale formation in aluminium industry by means of a cold-finger. The Minerals, Metals & Materials Series.
Academic article
Jin, Zhequan; Hafner, Armin; Eikevik, Trygve Magne; Nekså, Petter. (2019) Preliminary study on CO2 transcritical ejector enhanced compressor refrigeration system for independent space cooling and dehumidification. International journal of refrigeration. volum 100.
Academic article
Kumar, Kundan; Singh, Simarpreet; Kumar, Pramod; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2019) Experimental analysis of transcritical CO2 booster refrigeration system with heat recovery and ejector expansion. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Nekså, Petter; Bantle, Michael; Schlemminger, Christian; Bamigbetan, Opeyemi Olayinka. (2019) High temperature industrial heat pumps utilising natural working fluids. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Nekså, Petter; Røkke, Petter Egil. (2019) Energibruk og utslipp i industrien: Den billigste kilowatttimen. Det Nye Digitale Norge.
publications.POPVIT_KAPITTEL
Schlemminger, Christian; Svendsen, Eirik Starheim; Foslie, Sverre Stefanussen; Bantle, Michael; Bamigbetan, Opeyemi Olayinka; Nekså, Petter. (2019) Performance of high temperature heat pump for simultaneous and efficient production of ice water and process heat. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Sharooz, Mina; Lindqvist, Per; Nekså, Petter. (2019) Effect of Working Fluid Type on Low Temperature Rankine Cycle Optimization. Proceedings of the 5th International Seminar on ORC Power Systems.
Academic chapter/article/Conference paper
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash; Nekså, Petter. (2019) Experimental Evaluation of a Multi-Ejector Trans-critical CO2 System for Supermarkets. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Tomasgard, Asgeir; Berstad, David Olsson; Blekkan, Edd Anders; Karstad, Per Ivar; Burheim, Odne Stokke; Dawson, James; Espegren, Kari Aamodt; Løvås, Terese; Meyer, Julien; Møller-Holst, Steffen; Nekså, Petter; Pollet, Bruno; Størset, Sigmund Østtveit; Sundseth, Kyrre; Thomassen, Magnus; Ulleberg, Øystein. (2019) Hydrogen i fremtidens lavkarbonsamfunn. 2019. ISBN 978-82-93198-31-4.
Report

2018

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Experimental investigation of the performance of a hydrocarbon heat pump for high temperature industrial heating. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Theoretical analysis for charge reduction in a 200 kW hydrocarbon hight temperature heat pump. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Theoretical analysis of suitable fluids for high temperature heat pumps up to 125 °C heat delivery. International journal of refrigeration. volum 92.
Academic article
Berstad, David Olsson; Nekså, Petter. (2018) Ambisiøse planer for hydrogen i Japan.
Website (informational material)
Blust, Stefanie; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2018) Possible configurations of multiejector driven CO2 systems for Indian supermarkets. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Blust, Stefanie; Singh, Simarpreet; Banasiak, Krzysztof; Nekså, Petter. (2018) Environment-friendly refrigeration packs for Indian supermarkets: experimental investigation of energy performance of a multiejector-driven R744 integrated compressor rack. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Dieryckx, Martin; Chen, Guangming; Gluckman, Ray; Nekså, Petter; Okada, Tetsuji. (2018) Water and space heating heat pumps. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Dorman, Dennis; Calm, James M.; Dieryckx, Martin; Hamed, Samir; Pachai, Alex; Rusignuolo, Gorgio; Nekså, Petter; Hickman, Kenneth E.. (2018) Chillers. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Ervik, Åsmund; Saai, Afaf; Meyer, Ole; Nekså, Petter. (2018) Modelling of mechanical and flow processes in compressors. 2018.
Report
Hafner, Armin; Nekså, Petter. (2018) Integrated CO2 solutions for supermarkets. Science et technique du froid. volum 2018-June.
Academic article
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep1: Utnytte industriell overskuddsvarme. SINTEF Energi, Facebook. 2018.
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Nekså, Petter. (2018) Naturlige arbeidsmedier Ep1: Utnytte industriell overskuddsvarme. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep2: Hvor bruker man arbeidsmedier?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep2: Hvor bruker man arbeidsmedier?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep3: Er kunstige arbeidsmedier egentlig så farlige?. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep3: Er kunstige arbeidsmedier egentlig så farlige?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep4: CO2 som arbeidsmedium. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep4: CO2 som kuldemedium. SINTEF Energi. 2018.
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Nekså, Petter. (2018) Naturlige arbeidsmedier Ep5: Arbeidsmedier og overskuddsvarme. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep5: Konvertering av overskuddsvarme. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter; Berstad, David Olsson; Størset, Sigmund Østtveit. (2018) Fossil lhjelp til grønt skifte. Dagens næringsliv.
Feature article
Rajendran, Rajan; Janssen, Martien; Kauffeld, Michael; Lal, D. Mohan; Nekså, Petter; Pedersen, Per-Henrik; Motta, Samuel Yana. (2018) Commercial refrigeration. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2018) Natural refrigerants for low temperature power cycles. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Banasiak, Krzysztof; Hafner, Armin; Maiya, M.P.; Nekså, Petter. (2018) Performance evaluation of CO2 ejector system with parallel compressor for supermarket application. 17th International Refrigeration and Air Conditioning Conference 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash M.; Nekså, Petter. (2018) Experimental evaluation of multi-ejector based CO2 cooling system for supermarkets in tropical zones. 17th International Refrigeration and Air Conditioning Conference 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2018) CO2 refrigeration system for high ambient temperatures. Air Conditioning and Refrigeration Journal. volum 21 (5).
Article
Singh, Simarpreet; Reddy, Amshith; Parkash, Maiya M.; Banasiak, Krzysztof; Hafner, Armin; Nekså, Petter. (2018) Analysis of R744 refrigeration system with liquid ejectors. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Reddy, Amshith; Prakash, Maiya P.; Banasiak, Krzysztof; Hafner, Armin; Nekså, Petter. (2018) Performance investigation of a multi-ejector R744 heat pump. Science et technique du froid. volum 2018-June.
Academic article
Wilhelmsen, Øivind; Berstad, David Olsson; Aasen, Ailo; Nekså, Petter; Skaugen, Geir. (2018) Reducing the exergy destruction in the cryogenic heat exchangers of hydrogen liquefaction processes. International Journal of Hydrogen Energy. volum 43 (10).
Academic article

2017

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2017) Extending ammonia high temperature heat pump using butane in a cascade system. 7th Conference on Ammonia and CO2 Refrigeration Technology, Ohrid, Macedonia, May 11-13, 2017.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2017) Review of Vapour Compression Heat Pumps for High Temperature Heating using Natural Working Fluids. International journal of refrigeration. volum 80.
Academic literature review
Berstad, David Olsson; Wilhelmsen, Øivind; Skjervold, Vidar T.; Nekså, Petter. (2017) Cryogenic CO2 condensation and membrane separation of syngas for large-scale LH2 production. Cryogenics 2017 : Proceedings of the 14th IIR International Conference, Dresden, Germany, Mai 15-19, 2017..
Academic chapter/article/Conference paper
Clos, Daniel Perez; Andresen, Trond; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2017) Enabling Efficient Heat Recovery from Aluminium Pot Gas. Light metals 2017.
Academic chapter/article/Conference paper
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin. (2017) A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system. International journal of refrigeration. volum 76.
Academic article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu. (2017) Annual energy performance of R744 and R410A heat pumping systems. Applied Thermal Engineering. volum 117.
Academic article
Kauko, Hanne; Nordtvedt, Stein Rune; Nekså, Petter; Bantle, Michael. (2017) High-temperature heat pumps based on natural working fluids to produce district heating from industrial waste heat. 7th Conference on Ammonia and CO2 Refrigeration Technology, Ohrid, Macedonia, May 11-13, 2017.
Academic chapter/article/Conference paper
Nekså, Petter. (2017) FN-møte i Jordan for å fase ut klimagasser.
Website (informational material)
Wilhelmsen, Øivind; Skaugen, Geir; Berstad, David Olsson; Aasen, Ailo; Nekså, Petter. (2017) Understanding the physical phenomena that occur inside heat exchangers for liquefaction of hydrogen. Cryogenics 2017 : Proceedings of the 14th IIR International Conference, Dresden, Germany, Mai 15-19, 2017..
Academic chapter/article/Conference paper
Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Hattori, Kazuyuki; Nekså, Petter. (2017) Experimental Observation of CO2 Dry-ice Behavior in an Evaporator/Sublimator. Energy Procedia. volum 143.
Academic article

2016

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2016) Evaluation of Natural working fluids for the Development of high temperature heat pumps. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Haukås, Hans T.; Stene, Jørn; Rekstad, Inge Håvard; Nekså, Petter; Hafner, Armin; Eikevik, Trygve Magne. (2016) CO2 (R744) som kuldemedium. 2016.
Compendium
Hemmingsen, Anne Karin; Nekså, Petter. (2016) Spillvarme inn i varmen. Gemini.
Feature article
Hemmingsen, Anne Karin; Nekså, Petter. (2016) Spillvarme inn i varmen. Dagens næringsliv.
Feature article
Hu, Haitao; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, Guoliang; Huang, Qingnan; Ye, Jingjing. (2016) Performance analysis of an R744 ground source heat pump system with air-cooled and water-cooled gas coolers. International journal of refrigeration. volum 63.
Academic article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin. (2016) Investigation on CO2 hybrid ground-coupled heat pumping system under warm climate. International journal of refrigeration. volum 62.
Academic article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu. (2016) Energy efficiency comparison of heat pumping systems using R744 and R410A as refrigerant. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Nekså, Petter. (2016) What is the role for gas in the future?.
Website (informational material)
Nekså, Petter; Hafner, Armin; Bredesen, Arne Mathias; Eikevik, Trygve Magne. (2016) CO2 as working fluid - technological development on the road to sustainable refrigeration. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2016) CO2 gir grønn kjøling. Dagens næringsliv.
Feature article

2015

Berstad, David Olsson; Nekså, Petter. (2015) Flytende vind og gass til Japan?. Dagens næringsliv.
Feature article
Clodic, Denis; Janssen, Martien; Kauffeld, Michael; Nekså, Petter; Pedersen, Per-Henrik; Silva, Alessandro; Rajandran, Rajan. (2015) Commercial refrigeration. Montreal protocol on substances that deplete the ozone layer : UNEP 2014 Report on the refrigeration, air conditioning and heat pumps Technical Options Committee : 2014 assessment.
Academic chapter/article/Conference paper
Dieryckx, Martin; Chen, Guangming; Grozdek, Marino; Kaibara, Makoto; Nekså, Petter; Okada, Tetsuji. (2015) Water heating heat pumps. Montreal protocol on substances that deplete the ozone layer : UNEP 2014 Report on the refrigeration, air conditioning and heat pumps Technical Options Committee : 2014 assessment.
Academic chapter/article/Conference paper
DiRenzo, Joseph; Nekså, Petter; Kolsaker, Kjell. (2015) Analysis of Natural Gas engine de-loading on LNG fuelled vessels. Energy Procedia. volum 64 (C).
Academic article
Fidorra, N; Hafner, Armin; Nekså, Petter; Köhler, Jürgen. (2015) Energy cost analysis of heat recovery in CO2 supermarket refrigeration systems. Ammonia and CO2 Refrigeration Technologies - Ohrid, Macedonia April 16-18, 2015 - Proceedings.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2015) Il futoro del CO2 : confronto di diverse configurazioni di un sistema ad R744 per supermercati nei paesi piu caldi. Industria & formazione.
Article
Hafner, Armin; Nekså, Petter. (2015) System configurations for supermarkets in warm climates applying R744 refrigeration technologies - case studies of selected cities. 16th European Conference - Latest technologies in refrigeration and air conditioning, Milano 12th-13th June 2015 - Expo 2015.
Chapter
Iwamoto, Yuhiro; Yamasaki, Haruhiko; Niu, Xiao-Dong; Nekså, Petter; Yamaguchi, Hiroshi. (2015) Experimental study on system performance of ultra-low temperature cascade refrigeration system using Carbon Dioxide with tapered evaporator/sublimator. Proceedings of the 24th International Congress of Refrigeration.
Academic chapter/article/Conference paper
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, Guoliang. (2015) ENERGY PERFORMANCE OF CO2 HYBRID GROUND-COUPLED HEAT PUMPING SYSTEM FOR HOTEL APPLICATION. Proceedings of the 24th International Congress of Refrigeration.
Academic chapter/article/Conference paper
Jordal, Kristin; Anantharaman, Rahul; Peters, Thijs; Berstad, David Olsson; Morud, John Christian; Nekså, Petter; Bredesen, Rune. (2015) High-purity H2 production with CO2 capture based on coal gasification. Energy. volum 88.
Academic article
Jordal, Kristin; Berstad, David Olsson; Nekså, Petter. (2015) Hydrogen cars: The role of fossil fuels and CCS in a cleaner transport system.
Website (informational material)
Jordal, Kristin; Berstad, David Olsson; Nekså, Petter. (2015) The role of fossil fuels and CCS in a cleaner transport system.
Website (informational material)
Nekså, Petter. (2015) Energisk mellom Japan og Norge.
Briefs
Nekså, Petter. (2015) Preface. Energy Procedia. volum 64 (C).
Editorial
Nekså, Petter; Dieryckx, Martin; Chen, Guangming; Grozdek, Marino; kaibara, Makoto; Okada, Tetsuji. (2015) Water Heating Heat Pumps. 2014 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Janssen, Martien; Kauffeld, Michael; Pedersen, Per-Henrik; Silva, Alessandro; Rajandran, Rajan. (2015) Commercial Refrigeration. 2014 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter

2014

Berstad, David Olsson; Roussanaly, Simon; Skaugen, Geir; Anantharaman, Rahul; Nekså, Petter; Jordal, Kristin. (2014) Energy and Cost Evaluation of A Low-temperature CO2 Capture Unit for IGCC plants. Energy Procedia. volum 63.
Academic article
Hafner, Armin; Hemmingsen, Anne Karin; Nekså, Petter. (2014) System configuration for supermarkets in warm climates applying R744 refrigeration technologies - case study of selected chinese cities. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2014) System configurations for supermarkets i warm climates applying R744 refrigeration technologies - case study of selected cities. Industria & formazione.
Popular scientific article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, G.; Hu, Haitao. (2014) Transient simulation of R744 hybrid ground coupled heat pump with modelica. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Mazzetti, Marit Jagtoyen; Ladam, Yves; Walnum, Harald Taxt; Hagen, Brede Andre Larsen; Skaugen, Geir; Nekså, Petter. (2014) Flexible Combined Heat and Power Systems for Offshore Oil and Gas Facilities With CO2 Bottoming Cycles. ASME 2014 Power Conference - POWER 2014 - Volume 2.
Academic chapter/article/Conference paper
Mazzetti, Marit Jagtoyen; Nekså, Petter; Walnum, Harald Taxt; Hemmingsen, Anne Karin. (2014) Energy-Efficient Technologies for Reduction of Offshore CO2 Emissions. Oil and Gas Facilities. volum 3 (1).
Academic literature review
Nekså, Petter. (2014) Carbon dioxide applications. CO2 as a refrigerant.
Academic chapter/article/Conference paper
Skaugen, Geir; Walnum, Harald Taxt; Hagen, Brede Andre Larsen; Clos, Daniel Perez; Mazzetti, Marit Jagtoyen; Nekså, Petter. (2014) Design and optimization of waste heat recovery unit using carbon dioxide as cooling fluid. ASME 2014 Power Conference - POWER 2014 - volume 1.
Academic chapter/article/Conference paper
Yamaguchi, H.; Iwamoto, Y; Ozaki, S; Nekså, Petter. (2014) Experimental observation of sedimentation phenomena of CO2 dry ice in model channel. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Ye, Jingjing; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, G.; Hu, H.. (2014) Performance and economy analysis of a solar assisted CO2 ground source heat pump with air-cooled gas cooler under different climate conditions. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper

2013

Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Integrated Low-temperature CO2 Capture from IGCC Power Plant by Partial Condensation and Separation of Syngas. Chemical Engineering Transactions.
Academic article
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Low-temperature CCS from an IGCC Power Plant and Comparison with Physical Solvents. Energy Procedia. volum 37.
Academic article
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Low-temperature CO2 capture technologies - Applications and potential. International journal of refrigeration. volum 36 (5).
Academic literature review
Hafner, Armin; Justo Alonso, Maria; Schmälzle, Christian; Nekså, Petter. (2013) High efficient 18-90 m3/h R744 compressor. Compressors 2013 : 8th International Conference on Compressors and Coolants.
Academic chapter/article/Conference paper
Kus, Bartosz; Nekså, Petter. (2013) Development of one-dimensional model for initial design and evaluation of oil-free CO2 turbo-compressor. International journal of refrigeration. volum 36 (8).
Academic article
Kus, Bartosz; Nekså, Petter. (2013) Novel partial admission radial compressor for CO2 applications. International journal of refrigeration. volum 36 (8).
Academic article
Kus, Bartosz; Nekså, Petter. (2013) Oil free turbo-compressors for CO2 refrigeration applications. International journal of refrigeration. volum 36 (5).
Academic article
Mazzetti, Marit Jagtoyen; Nekså, Petter; Walnum, Harald Taxt; Hemmingsen, Anne Karin. (2013) Novel energy efficiency technologies for reduction of offshore CO2 emissions. Offshore Technology Conference.
Academic chapter/article/Conference paper
Rohde, Daniel; Walnum, Harald Taxt; Andresen, Trond; Nekså, Petter. (2013) Heat recovery from export gas compression: Analyzing power cycles with detailed heat exchanger models. Applied Thermal Engineering. volum 60 (1-2).
Academic article
Walnum, Harald Taxt; Nekså, Petter; Nord, Lars Olof; Andresen, Trond. (2013) Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions. Energy. volum 59.
Academic article

2012

Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2012) Low-temperature CO2 Removal from Natural Gas. Energy Procedia. volum 26.
Academic article
Hafner, Armin; Poppi, Stefano; Nekså, Petter; Minetto, Silvia; Eikevik, Trygve Magne. (2012) Development of Commersial Refrigeration Systems with Heat Recovery for Supermaket Buildings. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Hafner, Armin; Schmälzle, Christian; Nekså, Petter; Obrist, Frank; Rekstad, Inge Håvard. (2012) High efficient 100 kW elR744 compressor. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Kus, Bartosz; Nekså, Petter. (2012) Oil Free Turbo-Compressors For Refrigeration Applications. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Mazzetti, Marit Jagtoyen; Nekså, Petter. (2012) Tapt kraft til Nytte. Dagens næringsliv. volum 123 (281).
Feature article
Quack, Hans; Essler, Jürgen; Haberstroh, Christoph; Walnum, Harald Taxt; Berstad, David Olsson; Drescher, Michael; Nekså, Petter. (2012) Search for the Best Processes to Liquefy Hydrogen in Very Large Plants. Proceedings : the 12th Cryogenics 2012 IIR International Conference, Dresden, Germany, September 11-14, 2012.
Academic chapter/article/Conference paper
Rohde, Daniel; Ladam, Yves; Walnum, Harald Taxt; Nekså, Petter. (2012) Heat pumps for steam production from waste heat. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Titze, Maren; Lemke, Nicholas; Nekså, Petter; Hafner, Armin; Köhler, Jürgen. (2012) Dynamic modeling of a combined supermarket refrigeration and HVAC system. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Walnum, Harald Taxt; Berstad, David Olsson; Drescher, Michael; Nekså, Petter; Quack, Hans; Haberstroh, Christoph; Essler, Jürgen. (2012) Principles for the Liquefaction of Hydrogen with Emphasis on Precooling Processes. Proceedings : the 12th Cryogenics 2012 IIR International Conference, Dresden, Germany, September 11-14, 2012.
Academic chapter/article/Conference paper

2011

Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2011) Potential for low-temperature concepts in different CCS applications. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) Low-temperature syngas separation for CO2 capture from an IGCC power plant. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Berstad, David Olsson; Nekså, Petter; Reigstad, Gunhild Allard. (2011) Low-temperature syngas separation and CO2 capture for enhanced efficiency of IGCC power plants. Energy Procedia. volum 4.
Academic article
Hafner, Armin; Nekså, Petter; Ladam, Yves; Eikevik, Trygve Magne. (2011) OIL-FREE R744 SYSTEMS FOR INDUSTRIAL/COMMERCIAL APPLICATIONS. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter; Ladam, Yves; Eikevik, Trygve Magne. (2011) Oljefrie CO2 systemer for industrielle og kommersielle anvendelser. Kulde.
Academic article
Krasae-in, Songwut; Bredesen, Arne Mathias; Stang, Hans Georg Jacob; Nekså, Petter. (2011) Simulation and experiment of a hydrogen liquefaction test rig using a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 36 (1).
Academic article
Nekså, Petter; Berstad, David Olsson; Anantharaman, Rahul. (2011) Overview of current and possible applications for refrigeration technologies within CCS. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Nekså, Petter; Čermák, Radim; Kauffeld, Michael; Pachai, Alexander C.; Wild, Yves; Cavalier, Gerald; Xie, Ruhe; Colborne, Daniel. (2011) Transport Refrigeration. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Clodic, Denis; Kauffeld, Michael; Pedersen, Per-Henrik; Peixoto, Roberto. (2011) Commercial Refrigeration. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Hickman, Kenneth E.; Calm, James M.; Chen, Guangming; Crawford, Jim; Dorman, Dennis; Pachai, Alexander C.; Pearson, Andy; Colbourne, Daniel; Ohtsuki, Akira. (2011) Chillers. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; kaibara, Makoto; Dieryckx, Martin; Keller, Fred J.; Calm, James M.; Colbourne, Daniel; Pachai, Alexander C.; Hickman, Kenneth E.; Nordman, Roger. (2011) Heat Pumps. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Keller, Fred J.; Colbourne, Daniel; Devotta, Sukumar; Agarwal, Radhey; Crawford, Jim; Dieryckx, Martin; kaibara, Makoto; McInerney, Ed; Nelson, Horace A.; Vodianitskaia, Paulo. (2011) Air-to-Air Air Conditioners and Heat Pumps. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Niu, Xiao-Dong; Yamaguchi, Hiroshi; Iwamoto, Yuhiro; Nekså, Petter. (2011) Experimental study on a CO2-solid-gas-flow-based ultra-low temperature cascade refrigeration system. International Journal of Low-Carbon Technologies. volum 6 (2).
Academic article
Tangen, Grethe; Hemmingsen, Anne Karin; Lorentsen, Odd-Arne; Nekså, Petter. (2011) Energy efficiency in industry - a main path for increased value creation and sustainable energy use. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Tangen, Grethe; Hemmingsen, Anne Karin; Nekså, Petter. (2011) CREATIV: Research-based innovation for industry energy efficiency. Applied Thermal Engineering. volum 31 (17-18).
Academic article
Walnum, Harald Taxt; Ladam, Yves; Nekså, Petter; Andresen, Trond. (2011) Off-design operation of ORC and CO2 power production cycles for low temperature surplus heat recovery. International Journal of Low-Carbon Technologies. volum 6 (2).
Academic article
Yamaguchi, Hiroshi; Niu, Xiao-Dong; Sekimoto, Kenichi; Nekså, Petter. (2011) Investigation of dry ice blockage in an ultra-low temperature cascade refrigeration system using CO2 as a working fluid. International journal of refrigeration. volum 34 (2).
Academic article

2010

Berstad, David Olsson; Stang, Jacob H; Nekså, Petter. (2010) Large-scale hydrogen liquefier utilising mixed-refrigerant pre-cooling. International Journal of Hydrogen Energy. volum 35 (10).
Academic article
Hafner, Armin; Christensen, Øystein Torp; Nekså, Petter. (2010) Reversible R744 (CO2) heat pumps applied in public trains. 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids.
Academic chapter/article/Conference paper
Hafner, Armin; Ladam, Yves; Andresen, Trond; Nekså, Petter. (2010) Experimental investigation of different ejector geometries for R-744 transcritical systems. 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids.
Academic chapter/article/Conference paper
Krasae-in, Songwut; Stang, Jacob H; Nekså, Petter. (2010) Exergy analysis on the simulation of a small-scale hydrogen liquefaction test rig with a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 35 (15).
Academic article
Krasae-in, Songwut; Stang, Jacob H; Nekså, Petter. (2010) Simulation on a proposed large-scale liquid hydrogen plant using a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 35 (22).
Academic article
Skaugen, Geir; Reigstad, Gunhild Allard; Nekså, Petter; Wahl, Per Eilif. (2010) Use of sophisticated heat exchanger simulation models for investigation of possible design and operational pitfalls in LNG processes. Journal of Natural Gas Science and Engineering. volum 2 (5).
Academic article

2009

Berstad, David Olsson; Stang, Jacob H; Nekså, Petter. (2009) Comparison criteria for large-scale hydrogen liquefaction processes. International Journal of Hydrogen Energy. volum 34 (3).
Academic article

2008

Zha, Shitong; Hafner, Armin (SINTEF); Nekså, Petter (SINTEF). (2008) Investigation of R-744 Voorhees transcritical heat pump system. International journal of refrigeration. volum 31 (1).
Academic article

2007

Eikevik, Trygve Magne; Nekså, Petter (SINTEF). (2007) Proceedings - 7th IIR Gustav Lorentzen Conference on Natural Working Fluids. 2007. ISBN 2-913149-48-0.
Non-fiction book
Haukås, Hans Torleiv; Stene, Jørn; Rekstad, Inge Håvard; Nekså, Petter (SINTEF); Eikevik, Trygve Magne. (2007) Kjøle- og fryseanlegg med CO2 (R744) som kuldemedium. 2007. ISBN 000-00-000-0000-0.
Textbook
Hafner, Armin; Nekså, Petter. (2007) Global environmental and economic benefits of introducing R-744 mobile air conditioning. Proceedings : 22nd International Congress of Refrigeration : Refrigeration creates the future.
Academic chapter/article/Conference paper
Stene, Jørn; Andresen, Trond; Skiple, Torgeir; Nekså, Petter. (2007) CO2 Heat pump system for combined heating and cooling of non-residential buildings. Proceedings : 22nd International Congress of Refrigeration : Refrigeration creates the future.
Academic chapter/article/Conference paper

2006

Aspelund, Audun; Reigstad, Gunhild Allard; Nekså, Petter; Kolsaker, Kjell. (2006) LNG-Chain, a calculation tool for natural gas quality in small-scale LNG distribution chains. Science et technique du froid.
Academic article
Hafner, Armin; Nekså, Petter. (2006) Global environmental consequences of introducing R-744 (CO2) mobile air conditioning. 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006).
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2006) Globale Konsequenzen bei der Einführung von Fahrzeugklimaanlagen mit dem Kältemittel R-744. Deutsche Kälte-Klima-Tagung 2006 Dresden.
Academic chapter/article/Conference paper
Nekså, Petter. (2006) Performance of CO2-refrigeration (R-744) in commercial cold drink equipment. 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006).
Academic chapter/article/Conference paper

2005

Nekså, Petter; Hoggen, Rune Lillethun; Aflekt, Kåre; Jakobsen, Arne; Skaugen, Geir. (2005) Fan-less heat exchanger concept for CO2 heat pump systems. International journal of refrigeration. volum 28.
Academic article
Nekså, Petter. (2005) Refrigeration sector. IPCC/TEAP special report on safeguarding the ozone layer and the global climate system : issues related to hydrofluorocarbons and perfluorocarbons.
Academic chapter/article/Conference paper

2004

Nekså, Petter; Girotto, Sergio; Minetto, Silvia; Pettersen, Jostein. (2004) Commercial refrigeration system using CO2 as the refrigerant. International journal of refrigeration. volum 27 (7).
Academic article
Jakobsen, Arne; Skaugen, Geir; Skiple, Torgeir; Nekså, Petter; Andresen, Trond. (2004) Development and Evaluation of a Reversible CO2 Residential Air Conditioning System Compared to State-of-the-Art R410A Unit. 6th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2004).
Academic chapter/article/Conference paper

2002

Elgsæther, Munan; Nekså, Petter; Skaugen, Geir; Rekstad, Håvard. (2002) CO2 as refrigerant in beverage coolers, Evaluation and prototype testing. 2002. SINTEF Rapport (TRF5738).
Report
Munkejord, Svend Tollak; Mæhlum, Harald S.; Zakeri, Gholam R.; Nekså, Petter; Pettersen, Jostein. (2002) Micro technology in heat pumping systems. International journal of refrigeration. volum 25.
Academic article
Nekså, Petter; Pettersen, Jostein. (2002) Air Conditioning and Heat Pump Technology Development in Europe. The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea. volum 31 (7).
Academic article
Pettersen, Jostein; Nekså, Petter. (2002) Financial Times' Global Energy Awards 2001 : NTNU/Sintef CO2-teknologi til finalen. Xergi. volum 42 (1).
Popular scientific article
Pettersen, Jostein; Nekså, Petter; Rekstad, Håvard. (2002) Testing and evaluation of a condensing unit in a residential air conditioning system. 2002. SINTEF Rapport (TRF5686).
Report
Rekstad, Håvard; Nekså, Petter. (2002) Testing and evaluation of CO2 compressors for the NBC project. Item 2. Compresosr tests at SINTEF. 2002. SINTEF Rapport (TRF5717).
Report
Nekså, Petter. (2002) CO2 heat pump system. International journal of refrigeration. volum 25 (4).
Academic article

2001

Aarlien, Rune; Pettersen, Jostein; Nekså, Petter; Strømmen, Ingvald; Eikevik, Trygve Magne; Bredesen, Arne Mathias. (2001) Place du CO2 dans les applications frigorifiques et de conditionnement d'air. La Revue Générale du Froid.
Academic article

2000

Nekså, Petter; Bredesen, Arne Mathias. (2000) Short Course on CO2 Refrigeration Technology (SC7). 2000.
Compendium
Strømmen, Ingvald; Bredesen, Arne Mathias; Eikevik, Trygve Magne; Nekså, P.; Pettersen, Jostein; Aarlien, R.. (2000) Refrigeration, Air-conditioning and Heat-Pump Systems for the 21st Century Pompes à chaleur, applicatins frigorifiques et de conditionnement d`air pour le 21e siècle. Bulletin of the International Institute of Refrigeration : Bulletin de l'Institut international du froid. volum LXXX (2).
Academic article

1999

Rekstad, Håvard; Nekså, Petter; Bredesen, Arne Mathias. (1999) Measurements on semi-hermetic pre-series CO2 compressors. 1999. ISBN 82-594-1675-1.
Report

1998

Nekså, Petter; Rekstad, Håvard; Zakeri, G. Reza; Schiefloe, Per Arne. (1998) CO%c-heat pump water heater : characteristics, system design and experimental results. International journal of refrigeration. volum 21 (3).
Popular scientific article
Stene, Jørn; Nekså, Petter. (1998) Highly Efficient CO2 Heat Pump Water Heaters. Heat Pump Centre Newsletter. volum 16 (4).
Popular scientific article

1996

Aarlien, Rune; Nekså, Petter; Pettersen, Jostein. (1996) CO2 som alternativt arbeidsmedium i air-conditioninganlegg og varmepumper for boligformål. Kulde.
Popular scientific article
Aarlien, Rune; Nekså, Petter; Pettersen, Jostein. (1996) Sammenlignende beregninger mellom anlegg med CO2 og R-22. Kulde.
Popular scientific article

1994

Haukås, Hans; Brendeng, Einar; Lorentzen, Gustav; Owren, Geir; Nekså, Petter; Aflekt, Kåre; Jørstad, Oddvar; Lystad, Tor; Nesje, Odd; Sandbakk, Marit. (1994) KFK-fri teknologi for kuldeanlegg og varmepumper : kompendiesamling nytt EEU-kurs. 1994.
Compendium
Nekså, Petter. (1994) Erstatningsmedier for HKFK-22. 1994.
Compendium

Journal publications

Voldsund, Mari; Reyes Lua, Adriana; Fu, Chao; Ditaranto, Mario; Nekså, Petter; Mazzetti, Marit Jagtoyen; Brekke, Olaf; Bindingsbø, Arne Ulrik; Grainger, David; Pettersen, Jostein. (2023) Low carbon power generation for offshore oil and gas production. Energy Conversion and Management: X. volum 17.
Academic article
Berstad, David Olsson; Skaugen, Geir; Roussanaly, Simon; Anantharaman, Rahul; Nekså, Petter; Jordal, Aina Benedikte Kristin; Trædal, Stian; Gundersen, Truls. (2022) CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation. Energies. volum 15 (2).
Academic article
Hagen, Brede Andre Larsen; Andresen, Trond; Nekså, Petter. (2022) Equation-oriented methods for optimizing Rankine cycles using radial inflow turbine. Energy. volum 252.
Academic article
Nekså, Petter. (2022) Vis oss varmepumpa di, så skal vi si om du bruker den rett. Adresseavisen.
Feature article
Perez Clos, Daniel; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2022) Composition and Structure Analysis of Hard Grey Scale (HGS) Formed on Cold Surfaces Exposed to Aluminium Production Off-gas. JOM. volum 74 (9).
Academic article
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2022) Performance of binary zeotropic mixtures in organic Rankine cycles (ORCs). Energy Conversion and Management. volum 266.
Academic article
Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter; Yamaguchi, Hiroshi. (2022) Visualization and Measurement of Swirling Flow of Dry Ice Particles in Cyclone Separator-Sublimator. Energies. volum 15 (11).
Academic article
Berstad, David Olsson; Gardarsdottir, Stefania Osk; Roussanaly, Simon; Voldsund, Mari; Ishimoto, Yuki; Nekså, Petter. (2021) Liquid hydrogen as prospective energy carrier: A brief review and discussion of underlying assumptions applied in value chain analysis. Renewable & Sustainable Energy Reviews. volum 154.
Academic article
Clos, Daniel Perez; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2021) Particle deposition characteristics in the formation of Hard Grey Scale (HGS) on cold surfaces exposed to aluminium production off-gas. Journal of Aerosol Science. volum 161.
Academic article
Hagen, Brede; Agromayor, Roberto; Nekså, Petter. (2021) Equation-oriented methods for design optimization and performance analysis of radial inflow turbines. Energy. volum 237.
Academic article
Singh, Simarpreet; Hafner, Armin; Maiya, M.P.; Banasiak, Krzysztof; Nekså, Petter. (2021) Multiejector CO2 cooling system with evaporative gascooler for a supermarket application in tropical regions. Applied Thermal Engineering. volum 190.
Academic article
Dasi, Koti; Singh, Simarpreet; Guruchethan, A.M.; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2020) Performance Evaluation of Ejector Based CO₂ System for Simultaneous Heating and Cooling Application in an Indian Dairy Industry. Thermal Science and Engineering Progress. volum 20.
Academic article
Ishimoto, Yuki; Voldsund, Mari; Nekså, Petter; Roussanaly, Simon; Berstad, David Olsson; Gardarsdottir, Stefania Osk. (2020) Large-scale production and transport of hydrogen from Norway to Europe and Japan: Value chain analysis and comparison of liquid hydrogen and ammonia as energy carriers. International Journal of Hydrogen Energy. volum 45 (58).
Academic article
Singh, Simarpreet; Maiya, Prakash; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2020) Energy efficient multiejector CO2 cooling system for high ambient temperature. Thermal Science and Engineering Progress. volum 19.
Academic article
Wakimoto, Hiroyuki; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter; Yamaguchi, Hiroshi. (2020) Dry-ice collection performance and collection mechanism of cyclone separator-evaporator. 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2020).
Academic article
Yamasaki, Haruhiko; Kizilkan, Ônder; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Experimental investigation of dry ice cyclone separator for ultra‐low temperature energy storage using carbon dioxide. Energy Storage. volum 2 (4).
Academic article
Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Kizilkan, Ônder; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Experimental investigation of the effect of solid-gas two-phase flow in CO2 cascade refrigeration system. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects.
Academic article
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2019) Experimental investigation of a prototype R-600 compressor for high temperature heat pump. Energy. volum 169.
Academic article
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2019) The development of a hydrocarbon high temperature heat pump for waste heat recovery. Energy. volum 173.
Academic article
Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2019) Investigation on scale formation in aluminium industry by means of a cold-finger. The Minerals, Metals & Materials Series.
Academic article
Jin, Zhequan; Hafner, Armin; Eikevik, Trygve Magne; Nekså, Petter. (2019) Preliminary study on CO2 transcritical ejector enhanced compressor refrigeration system for independent space cooling and dehumidification. International journal of refrigeration. volum 100.
Academic article
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Theoretical analysis of suitable fluids for high temperature heat pumps up to 125 °C heat delivery. International journal of refrigeration. volum 92.
Academic article
Hafner, Armin; Nekså, Petter. (2018) Integrated CO2 solutions for supermarkets. Science et technique du froid. volum 2018-June.
Academic article
Nekså, Petter; Berstad, David Olsson; Størset, Sigmund Østtveit. (2018) Fossil lhjelp til grønt skifte. Dagens næringsliv.
Feature article
Singh, Simarpreet; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2018) CO2 refrigeration system for high ambient temperatures. Air Conditioning and Refrigeration Journal. volum 21 (5).
Article
Singh, Simarpreet; Reddy, Amshith; Prakash, Maiya P.; Banasiak, Krzysztof; Hafner, Armin; Nekså, Petter. (2018) Performance investigation of a multi-ejector R744 heat pump. Science et technique du froid. volum 2018-June.
Academic article
Wilhelmsen, Øivind; Berstad, David Olsson; Aasen, Ailo; Nekså, Petter; Skaugen, Geir. (2018) Reducing the exergy destruction in the cryogenic heat exchangers of hydrogen liquefaction processes. International Journal of Hydrogen Energy. volum 43 (10).
Academic article
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2017) Review of Vapour Compression Heat Pumps for High Temperature Heating using Natural Working Fluids. International journal of refrigeration. volum 80.
Academic literature review
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin. (2017) A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system. International journal of refrigeration. volum 76.
Academic article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu. (2017) Annual energy performance of R744 and R410A heat pumping systems. Applied Thermal Engineering. volum 117.
Academic article
Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Hattori, Kazuyuki; Nekså, Petter. (2017) Experimental Observation of CO2 Dry-ice Behavior in an Evaporator/Sublimator. Energy Procedia. volum 143.
Academic article
Hemmingsen, Anne Karin; Nekså, Petter. (2016) Spillvarme inn i varmen. Gemini.
Feature article
Hemmingsen, Anne Karin; Nekså, Petter. (2016) Spillvarme inn i varmen. Dagens næringsliv.
Feature article
Hu, Haitao; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, Guoliang; Huang, Qingnan; Ye, Jingjing. (2016) Performance analysis of an R744 ground source heat pump system with air-cooled and water-cooled gas coolers. International journal of refrigeration. volum 63.
Academic article
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin. (2016) Investigation on CO2 hybrid ground-coupled heat pumping system under warm climate. International journal of refrigeration. volum 62.
Academic article
Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2016) CO2 gir grønn kjøling. Dagens næringsliv.
Feature article
Berstad, David Olsson; Nekså, Petter. (2015) Flytende vind og gass til Japan?. Dagens næringsliv.
Feature article
DiRenzo, Joseph; Nekså, Petter; Kolsaker, Kjell. (2015) Analysis of Natural Gas engine de-loading on LNG fuelled vessels. Energy Procedia. volum 64 (C).
Academic article
Hafner, Armin; Nekså, Petter. (2015) Il futoro del CO2 : confronto di diverse configurazioni di un sistema ad R744 per supermercati nei paesi piu caldi. Industria & formazione.
Article
Jordal, Kristin; Anantharaman, Rahul; Peters, Thijs; Berstad, David Olsson; Morud, John Christian; Nekså, Petter; Bredesen, Rune. (2015) High-purity H2 production with CO2 capture based on coal gasification. Energy. volum 88.
Academic article
Nekså, Petter. (2015) Preface. Energy Procedia. volum 64 (C).
Editorial
Berstad, David Olsson; Roussanaly, Simon; Skaugen, Geir; Anantharaman, Rahul; Nekså, Petter; Jordal, Kristin. (2014) Energy and Cost Evaluation of A Low-temperature CO2 Capture Unit for IGCC plants. Energy Procedia. volum 63.
Academic article
Hafner, Armin; Nekså, Petter. (2014) System configurations for supermarkets i warm climates applying R744 refrigeration technologies - case study of selected cities. Industria & formazione.
Popular scientific article
Mazzetti, Marit Jagtoyen; Nekså, Petter; Walnum, Harald Taxt; Hemmingsen, Anne Karin. (2014) Energy-Efficient Technologies for Reduction of Offshore CO2 Emissions. Oil and Gas Facilities. volum 3 (1).
Academic literature review
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Integrated Low-temperature CO2 Capture from IGCC Power Plant by Partial Condensation and Separation of Syngas. Chemical Engineering Transactions.
Academic article
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Low-temperature CCS from an IGCC Power Plant and Comparison with Physical Solvents. Energy Procedia. volum 37.
Academic article
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Low-temperature CO2 capture technologies - Applications and potential. International journal of refrigeration. volum 36 (5).
Academic literature review
Kus, Bartosz; Nekså, Petter. (2013) Development of one-dimensional model for initial design and evaluation of oil-free CO2 turbo-compressor. International journal of refrigeration. volum 36 (8).
Academic article
Kus, Bartosz; Nekså, Petter. (2013) Novel partial admission radial compressor for CO2 applications. International journal of refrigeration. volum 36 (8).
Academic article
Kus, Bartosz; Nekså, Petter. (2013) Oil free turbo-compressors for CO2 refrigeration applications. International journal of refrigeration. volum 36 (5).
Academic article
Rohde, Daniel; Walnum, Harald Taxt; Andresen, Trond; Nekså, Petter. (2013) Heat recovery from export gas compression: Analyzing power cycles with detailed heat exchanger models. Applied Thermal Engineering. volum 60 (1-2).
Academic article
Walnum, Harald Taxt; Nekså, Petter; Nord, Lars Olof; Andresen, Trond. (2013) Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions. Energy. volum 59.
Academic article
Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2012) Low-temperature CO2 Removal from Natural Gas. Energy Procedia. volum 26.
Academic article
Mazzetti, Marit Jagtoyen; Nekså, Petter. (2012) Tapt kraft til Nytte. Dagens næringsliv. volum 123 (281).
Feature article
Berstad, David Olsson; Nekså, Petter; Reigstad, Gunhild Allard. (2011) Low-temperature syngas separation and CO2 capture for enhanced efficiency of IGCC power plants. Energy Procedia. volum 4.
Academic article
Hafner, Armin; Nekså, Petter; Ladam, Yves; Eikevik, Trygve Magne. (2011) Oljefrie CO2 systemer for industrielle og kommersielle anvendelser. Kulde.
Academic article
Krasae-in, Songwut; Bredesen, Arne Mathias; Stang, Hans Georg Jacob; Nekså, Petter. (2011) Simulation and experiment of a hydrogen liquefaction test rig using a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 36 (1).
Academic article
Niu, Xiao-Dong; Yamaguchi, Hiroshi; Iwamoto, Yuhiro; Nekså, Petter. (2011) Experimental study on a CO2-solid-gas-flow-based ultra-low temperature cascade refrigeration system. International Journal of Low-Carbon Technologies. volum 6 (2).
Academic article
Tangen, Grethe; Hemmingsen, Anne Karin; Nekså, Petter. (2011) CREATIV: Research-based innovation for industry energy efficiency. Applied Thermal Engineering. volum 31 (17-18).
Academic article
Walnum, Harald Taxt; Ladam, Yves; Nekså, Petter; Andresen, Trond. (2011) Off-design operation of ORC and CO2 power production cycles for low temperature surplus heat recovery. International Journal of Low-Carbon Technologies. volum 6 (2).
Academic article
Yamaguchi, Hiroshi; Niu, Xiao-Dong; Sekimoto, Kenichi; Nekså, Petter. (2011) Investigation of dry ice blockage in an ultra-low temperature cascade refrigeration system using CO2 as a working fluid. International journal of refrigeration. volum 34 (2).
Academic article
Berstad, David Olsson; Stang, Jacob H; Nekså, Petter. (2010) Large-scale hydrogen liquefier utilising mixed-refrigerant pre-cooling. International Journal of Hydrogen Energy. volum 35 (10).
Academic article
Krasae-in, Songwut; Stang, Jacob H; Nekså, Petter. (2010) Exergy analysis on the simulation of a small-scale hydrogen liquefaction test rig with a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 35 (15).
Academic article
Krasae-in, Songwut; Stang, Jacob H; Nekså, Petter. (2010) Simulation on a proposed large-scale liquid hydrogen plant using a multi-component refrigerant refrigeration system. International Journal of Hydrogen Energy. volum 35 (22).
Academic article
Skaugen, Geir; Reigstad, Gunhild Allard; Nekså, Petter; Wahl, Per Eilif. (2010) Use of sophisticated heat exchanger simulation models for investigation of possible design and operational pitfalls in LNG processes. Journal of Natural Gas Science and Engineering. volum 2 (5).
Academic article
Berstad, David Olsson; Stang, Jacob H; Nekså, Petter. (2009) Comparison criteria for large-scale hydrogen liquefaction processes. International Journal of Hydrogen Energy. volum 34 (3).
Academic article
Zha, Shitong; Hafner, Armin (SINTEF); Nekså, Petter (SINTEF). (2008) Investigation of R-744 Voorhees transcritical heat pump system. International journal of refrigeration. volum 31 (1).
Academic article
Aspelund, Audun; Reigstad, Gunhild Allard; Nekså, Petter; Kolsaker, Kjell. (2006) LNG-Chain, a calculation tool for natural gas quality in small-scale LNG distribution chains. Science et technique du froid.
Academic article
Nekså, Petter; Hoggen, Rune Lillethun; Aflekt, Kåre; Jakobsen, Arne; Skaugen, Geir. (2005) Fan-less heat exchanger concept for CO2 heat pump systems. International journal of refrigeration. volum 28.
Academic article
Nekså, Petter; Girotto, Sergio; Minetto, Silvia; Pettersen, Jostein. (2004) Commercial refrigeration system using CO2 as the refrigerant. International journal of refrigeration. volum 27 (7).
Academic article
Munkejord, Svend Tollak; Mæhlum, Harald S.; Zakeri, Gholam R.; Nekså, Petter; Pettersen, Jostein. (2002) Micro technology in heat pumping systems. International journal of refrigeration. volum 25.
Academic article
Nekså, Petter; Pettersen, Jostein. (2002) Air Conditioning and Heat Pump Technology Development in Europe. The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea. volum 31 (7).
Academic article
Pettersen, Jostein; Nekså, Petter. (2002) Financial Times' Global Energy Awards 2001 : NTNU/Sintef CO2-teknologi til finalen. Xergi. volum 42 (1).
Popular scientific article
Nekså, Petter. (2002) CO2 heat pump system. International journal of refrigeration. volum 25 (4).
Academic article
Aarlien, Rune; Pettersen, Jostein; Nekså, Petter; Strømmen, Ingvald; Eikevik, Trygve Magne; Bredesen, Arne Mathias. (2001) Place du CO2 dans les applications frigorifiques et de conditionnement d'air. La Revue Générale du Froid.
Academic article
Strømmen, Ingvald; Bredesen, Arne Mathias; Eikevik, Trygve Magne; Nekså, P.; Pettersen, Jostein; Aarlien, R.. (2000) Refrigeration, Air-conditioning and Heat-Pump Systems for the 21st Century Pompes à chaleur, applicatins frigorifiques et de conditionnement d`air pour le 21e siècle. Bulletin of the International Institute of Refrigeration : Bulletin de l'Institut international du froid. volum LXXX (2).
Academic article
Nekså, Petter; Rekstad, Håvard; Zakeri, G. Reza; Schiefloe, Per Arne. (1998) CO%c-heat pump water heater : characteristics, system design and experimental results. International journal of refrigeration. volum 21 (3).
Popular scientific article
Stene, Jørn; Nekså, Petter. (1998) Highly Efficient CO2 Heat Pump Water Heaters. Heat Pump Centre Newsletter. volum 16 (4).
Popular scientific article
Aarlien, Rune; Nekså, Petter; Pettersen, Jostein. (1996) CO2 som alternativt arbeidsmedium i air-conditioninganlegg og varmepumper for boligformål. Kulde.
Popular scientific article
Aarlien, Rune; Nekså, Petter; Pettersen, Jostein. (1996) Sammenlignende beregninger mellom anlegg med CO2 og R-22. Kulde.
Popular scientific article

Books

Eikevik, Trygve Magne; Nekså, Petter (SINTEF). (2007) Proceedings - 7th IIR Gustav Lorentzen Conference on Natural Working Fluids. 2007. ISBN 2-913149-48-0.
Non-fiction book
Haukås, Hans Torleiv; Stene, Jørn; Rekstad, Inge Håvard; Nekså, Petter (SINTEF); Eikevik, Trygve Magne. (2007) Kjøle- og fryseanlegg med CO2 (R744) som kuldemedium. 2007. ISBN 000-00-000-0000-0.
Textbook

Part of book/report

Cely, Alexandra; Hammer, Morten; Andersen, Hilde; Yang, Tao; Nekså, Petter; Wilhelmsen, Øivind. (2022) Thermodynamic Model Evaluations for Hydrogen Pipeline Transportation. SPE EuropEC - Europe Energy Conference featured at the 83rd EAGE Annual Conference & Exhibition.
Academic chapter/article/Conference paper
Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2022) Coupled fluid-solid modelling of the valve dynamics in reciprocating compressors. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
Academic chapter/article/Conference paper
Yamaguchi, H.; Ishikawa, Yuki; Yamasaki, Hiroshi; Kamimura, Takeshi; Hattori, K; Nekså, Petter. (2022) Ultra-low temperature refrigeration system of CO2 using cyclone separator/evaporator. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2022 - Proceedings - Trondheim, Norway, June 13-15th 2022.
Academic chapter/article/Conference paper
Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th IIR Conference on Compressors and Refrigerants.
Academic chapter/article/Conference paper
Andresen, Trond; Lingaas, Simon Johan Nilsen; Hagen, Brede; Nekså, Petter. (2020) Dynamic Analysis of Energy Recovery Utilizing Thermal Storage from Batch-Wise Metal Casting. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Clos, Daniel Perez; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth. (2020) The Effect of Hard Scale Deposition on the Wall Heat Flux of a Cold Finger. Light Metals 2020.
Academic chapter/article/Conference paper
Hagen, Brede; Cavo, Matteo; Andresen, Trond; Nekså, Petter. (2020) Gradient Based Design Optimization of a Radial Inflow Turbine. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2020) Effect of Waste Heat Utilization on the Performance of Low Temperature Rankine Cycle. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Skjervold, Vidar T.; Skaugen, Geir; Andresen, Trond; Nekså, Petter. (2020) Enabling Power Production from Challenging Industrial Off-Gas – Model-Based Investigation of a Novel Heat Recovery Concept. IIR Rankine Conference 2020.
Academic chapter/article/Conference paper
Tazawa, Taluya; Yoshida, S; Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuhiro; Nekså, Petter. (2020) Thermal Characteristics in Supercritical CO2 Along Heating Tube. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Wakimoto, Hiroko; Uchi, K.; Yamasaki, Haruhiko; Yamaguchi, Hiroshi; Kamimura, Takeshi; Hattori, Kazuyuki; Nekså, Petter. (2020) Basic performance of CO2 cyclone refrigeration system. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Yamasaki, Haruhiko; Wakimoto, Hiroyuki; Yamaguchi, Hiroshi; Nekså, Petter. (2020) Solar heat recovery system using CO2 as working fluid. Proceedings of the 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants - GL2020.
Academic chapter/article/Conference paper
Banasiak, Krzysztof; Singh, Simarpreet; Hafner, Armin; Maiya, Prakash; Nekså, Petter; Pardiñas, Ángel Á.. (2019) Experimental investigation of CO2 systems for Indian supermarkets with parallel configuration of multiejectors (INDEE). Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Kumar, Kundan; Singh, Simarpreet; Kumar, Pramod; Maiya, M.P.; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2019) Experimental analysis of transcritical CO2 booster refrigeration system with heat recovery and ejector expansion. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Nekså, Petter; Bantle, Michael; Schlemminger, Christian; Bamigbetan, Opeyemi Olayinka. (2019) High temperature industrial heat pumps utilising natural working fluids. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Nekså, Petter; Røkke, Petter Egil. (2019) Energibruk og utslipp i industrien: Den billigste kilowatttimen. Det Nye Digitale Norge.
publications.POPVIT_KAPITTEL
Schlemminger, Christian; Svendsen, Eirik Starheim; Foslie, Sverre Stefanussen; Bantle, Michael; Bamigbetan, Opeyemi Olayinka; Nekså, Petter. (2019) Performance of high temperature heat pump for simultaneous and efficient production of ice water and process heat. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Sharooz, Mina; Lindqvist, Per; Nekså, Petter. (2019) Effect of Working Fluid Type on Low Temperature Rankine Cycle Optimization. Proceedings of the 5th International Seminar on ORC Power Systems.
Academic chapter/article/Conference paper
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash; Nekså, Petter. (2019) Experimental Evaluation of a Multi-Ejector Trans-critical CO2 System for Supermarkets. Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Experimental investigation of the performance of a hydrocarbon heat pump for high temperature industrial heating. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian. (2018) Theoretical analysis for charge reduction in a 200 kW hydrocarbon hight temperature heat pump. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Blust, Stefanie; Hafner, Armin; Banasiak, Krzysztof; Nekså, Petter. (2018) Possible configurations of multiejector driven CO2 systems for Indian supermarkets. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Blust, Stefanie; Singh, Simarpreet; Banasiak, Krzysztof; Nekså, Petter. (2018) Environment-friendly refrigeration packs for Indian supermarkets: experimental investigation of energy performance of a multiejector-driven R744 integrated compressor rack. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Dieryckx, Martin; Chen, Guangming; Gluckman, Ray; Nekså, Petter; Okada, Tetsuji. (2018) Water and space heating heat pumps. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Dorman, Dennis; Calm, James M.; Dieryckx, Martin; Hamed, Samir; Pachai, Alex; Rusignuolo, Gorgio; Nekså, Petter; Hickman, Kenneth E.. (2018) Chillers. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Rajendran, Rajan; Janssen, Martien; Kauffeld, Michael; Lal, D. Mohan; Nekså, Petter; Pedersen, Per-Henrik; Motta, Samuel Yana. (2018) Commercial refrigeration. Montreal Protocol on Substances that Deplete the Ozone Layer : 2018 report of the Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee.
Chapter
Shahrooz, Mina; Lundqvist, Per; Nekså, Petter. (2018) Natural refrigerants for low temperature power cycles. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Banasiak, Krzysztof; Hafner, Armin; Maiya, M.P.; Nekså, Petter. (2018) Performance evaluation of CO2 ejector system with parallel compressor for supermarket application. 17th International Refrigeration and Air Conditioning Conference 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash M.; Nekså, Petter. (2018) Experimental evaluation of multi-ejector based CO2 cooling system for supermarkets in tropical zones. 17th International Refrigeration and Air Conditioning Conference 2018.
Academic chapter/article/Conference paper
Singh, Simarpreet; Reddy, Amshith; Parkash, Maiya M.; Banasiak, Krzysztof; Hafner, Armin; Nekså, Petter. (2018) Analysis of R744 refrigeration system with liquid ejectors. Proceedings of the 13th IIR Gustav Lorentzen Conference, Valencia, 2018.
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2017) Extending ammonia high temperature heat pump using butane in a cascade system. 7th Conference on Ammonia and CO2 Refrigeration Technology, Ohrid, Macedonia, May 11-13, 2017.
Academic chapter/article/Conference paper
Berstad, David Olsson; Wilhelmsen, Øivind; Skjervold, Vidar T.; Nekså, Petter. (2017) Cryogenic CO2 condensation and membrane separation of syngas for large-scale LH2 production. Cryogenics 2017 : Proceedings of the 14th IIR International Conference, Dresden, Germany, Mai 15-19, 2017..
Academic chapter/article/Conference paper
Clos, Daniel Perez; Andresen, Trond; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2017) Enabling Efficient Heat Recovery from Aluminium Pot Gas. Light metals 2017.
Academic chapter/article/Conference paper
Kauko, Hanne; Nordtvedt, Stein Rune; Nekså, Petter; Bantle, Michael. (2017) High-temperature heat pumps based on natural working fluids to produce district heating from industrial waste heat. 7th Conference on Ammonia and CO2 Refrigeration Technology, Ohrid, Macedonia, May 11-13, 2017.
Academic chapter/article/Conference paper
Wilhelmsen, Øivind; Skaugen, Geir; Berstad, David Olsson; Aasen, Ailo; Nekså, Petter. (2017) Understanding the physical phenomena that occur inside heat exchangers for liquefaction of hydrogen. Cryogenics 2017 : Proceedings of the 14th IIR International Conference, Dresden, Germany, Mai 15-19, 2017..
Academic chapter/article/Conference paper
Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2016) Evaluation of Natural working fluids for the Development of high temperature heat pumps. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu. (2016) Energy efficiency comparison of heat pumping systems using R744 and R410A as refrigerant. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Nekså, Petter; Hafner, Armin; Bredesen, Arne Mathias; Eikevik, Trygve Magne. (2016) CO2 as working fluid - technological development on the road to sustainable refrigeration. 12th IIR Gustav Lorentzen Conference on Natural Refrigerants GL2016 : Proceedings.
Academic chapter/article/Conference paper
Clodic, Denis; Janssen, Martien; Kauffeld, Michael; Nekså, Petter; Pedersen, Per-Henrik; Silva, Alessandro; Rajandran, Rajan. (2015) Commercial refrigeration. Montreal protocol on substances that deplete the ozone layer : UNEP 2014 Report on the refrigeration, air conditioning and heat pumps Technical Options Committee : 2014 assessment.
Academic chapter/article/Conference paper
Dieryckx, Martin; Chen, Guangming; Grozdek, Marino; Kaibara, Makoto; Nekså, Petter; Okada, Tetsuji. (2015) Water heating heat pumps. Montreal protocol on substances that deplete the ozone layer : UNEP 2014 Report on the refrigeration, air conditioning and heat pumps Technical Options Committee : 2014 assessment.
Academic chapter/article/Conference paper
Fidorra, N; Hafner, Armin; Nekså, Petter; Köhler, Jürgen. (2015) Energy cost analysis of heat recovery in CO2 supermarket refrigeration systems. Ammonia and CO2 Refrigeration Technologies - Ohrid, Macedonia April 16-18, 2015 - Proceedings.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2015) System configurations for supermarkets in warm climates applying R744 refrigeration technologies - case studies of selected cities. 16th European Conference - Latest technologies in refrigeration and air conditioning, Milano 12th-13th June 2015 - Expo 2015.
Chapter
Iwamoto, Yuhiro; Yamasaki, Haruhiko; Niu, Xiao-Dong; Nekså, Petter; Yamaguchi, Hiroshi. (2015) Experimental study on system performance of ultra-low temperature cascade refrigeration system using Carbon Dioxide with tapered evaporator/sublimator. Proceedings of the 24th International Congress of Refrigeration.
Academic chapter/article/Conference paper
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, Guoliang. (2015) ENERGY PERFORMANCE OF CO2 HYBRID GROUND-COUPLED HEAT PUMPING SYSTEM FOR HOTEL APPLICATION. Proceedings of the 24th International Congress of Refrigeration.
Academic chapter/article/Conference paper
Nekså, Petter; Dieryckx, Martin; Chen, Guangming; Grozdek, Marino; kaibara, Makoto; Okada, Tetsuji. (2015) Water Heating Heat Pumps. 2014 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Janssen, Martien; Kauffeld, Michael; Pedersen, Per-Henrik; Silva, Alessandro; Rajandran, Rajan. (2015) Commercial Refrigeration. 2014 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Hafner, Armin; Hemmingsen, Anne Karin; Nekså, Petter. (2014) System configuration for supermarkets in warm climates applying R744 refrigeration technologies - case study of selected chinese cities. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, G.; Hu, Haitao. (2014) Transient simulation of R744 hybrid ground coupled heat pump with modelica. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Mazzetti, Marit Jagtoyen; Ladam, Yves; Walnum, Harald Taxt; Hagen, Brede Andre Larsen; Skaugen, Geir; Nekså, Petter. (2014) Flexible Combined Heat and Power Systems for Offshore Oil and Gas Facilities With CO2 Bottoming Cycles. ASME 2014 Power Conference - POWER 2014 - Volume 2.
Academic chapter/article/Conference paper
Nekså, Petter. (2014) Carbon dioxide applications. CO2 as a refrigerant.
Academic chapter/article/Conference paper
Skaugen, Geir; Walnum, Harald Taxt; Hagen, Brede Andre Larsen; Clos, Daniel Perez; Mazzetti, Marit Jagtoyen; Nekså, Petter. (2014) Design and optimization of waste heat recovery unit using carbon dioxide as cooling fluid. ASME 2014 Power Conference - POWER 2014 - volume 1.
Academic chapter/article/Conference paper
Yamaguchi, H.; Iwamoto, Y; Ozaki, S; Nekså, Petter. (2014) Experimental observation of sedimentation phenomena of CO2 dry ice in model channel. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Ye, Jingjing; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Ding, G.; Hu, H.. (2014) Performance and economy analysis of a solar assisted CO2 ground source heat pump with air-cooled gas cooler under different climate conditions. Proceedings of the 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014.
Academic chapter/article/Conference paper
Hafner, Armin; Justo Alonso, Maria; Schmälzle, Christian; Nekså, Petter. (2013) High efficient 18-90 m3/h R744 compressor. Compressors 2013 : 8th International Conference on Compressors and Coolants.
Academic chapter/article/Conference paper
Mazzetti, Marit Jagtoyen; Nekså, Petter; Walnum, Harald Taxt; Hemmingsen, Anne Karin. (2013) Novel energy efficiency technologies for reduction of offshore CO2 emissions. Offshore Technology Conference.
Academic chapter/article/Conference paper
Hafner, Armin; Poppi, Stefano; Nekså, Petter; Minetto, Silvia; Eikevik, Trygve Magne. (2012) Development of Commersial Refrigeration Systems with Heat Recovery for Supermaket Buildings. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Hafner, Armin; Schmälzle, Christian; Nekså, Petter; Obrist, Frank; Rekstad, Inge Håvard. (2012) High efficient 100 kW elR744 compressor. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Kus, Bartosz; Nekså, Petter. (2012) Oil Free Turbo-Compressors For Refrigeration Applications. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Quack, Hans; Essler, Jürgen; Haberstroh, Christoph; Walnum, Harald Taxt; Berstad, David Olsson; Drescher, Michael; Nekså, Petter. (2012) Search for the Best Processes to Liquefy Hydrogen in Very Large Plants. Proceedings : the 12th Cryogenics 2012 IIR International Conference, Dresden, Germany, September 11-14, 2012.
Academic chapter/article/Conference paper
Rohde, Daniel; Ladam, Yves; Walnum, Harald Taxt; Nekså, Petter. (2012) Heat pumps for steam production from waste heat. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Titze, Maren; Lemke, Nicholas; Nekså, Petter; Hafner, Armin; Köhler, Jürgen. (2012) Dynamic modeling of a combined supermarket refrigeration and HVAC system. Proceedings of 10th IIR Gustav Lorentzen Conference, June 25 - 27 2012 Delft, the Netherlands.
Academic chapter/article/Conference paper
Walnum, Harald Taxt; Berstad, David Olsson; Drescher, Michael; Nekså, Petter; Quack, Hans; Haberstroh, Christoph; Essler, Jürgen. (2012) Principles for the Liquefaction of Hydrogen with Emphasis on Precooling Processes. Proceedings : the 12th Cryogenics 2012 IIR International Conference, Dresden, Germany, September 11-14, 2012.
Academic chapter/article/Conference paper
Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2011) Potential for low-temperature concepts in different CCS applications. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) Low-temperature syngas separation for CO2 capture from an IGCC power plant. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter; Ladam, Yves; Eikevik, Trygve Magne. (2011) OIL-FREE R744 SYSTEMS FOR INDUSTRIAL/COMMERCIAL APPLICATIONS. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Nekså, Petter; Berstad, David Olsson; Anantharaman, Rahul. (2011) Overview of current and possible applications for refrigeration technologies within CCS. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Nekså, Petter; Čermák, Radim; Kauffeld, Michael; Pachai, Alexander C.; Wild, Yves; Cavalier, Gerald; Xie, Ruhe; Colborne, Daniel. (2011) Transport Refrigeration. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Clodic, Denis; Kauffeld, Michael; Pedersen, Per-Henrik; Peixoto, Roberto. (2011) Commercial Refrigeration. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Hickman, Kenneth E.; Calm, James M.; Chen, Guangming; Crawford, Jim; Dorman, Dennis; Pachai, Alexander C.; Pearson, Andy; Colbourne, Daniel; Ohtsuki, Akira. (2011) Chillers. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; kaibara, Makoto; Dieryckx, Martin; Keller, Fred J.; Calm, James M.; Colbourne, Daniel; Pachai, Alexander C.; Hickman, Kenneth E.; Nordman, Roger. (2011) Heat Pumps. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Nekså, Petter; Keller, Fred J.; Colbourne, Daniel; Devotta, Sukumar; Agarwal, Radhey; Crawford, Jim; Dieryckx, Martin; kaibara, Makoto; McInerney, Ed; Nelson, Horace A.; Vodianitskaia, Paulo. (2011) Air-to-Air Air Conditioners and Heat Pumps. 2010 REPORT OF THE REFRIGERATION, AIR CONDITIONING AND HEAT PUMPS TECHNICAL OPTIONS COMMITTEE.
Chapter
Tangen, Grethe; Hemmingsen, Anne Karin; Lorentsen, Odd-Arne; Nekså, Petter. (2011) Energy efficiency in industry - a main path for increased value creation and sustainable energy use. Proceedings of the 23rd International Congress of Refrigeration.
Academic chapter/article/Conference paper
Hafner, Armin; Christensen, Øystein Torp; Nekså, Petter. (2010) Reversible R744 (CO2) heat pumps applied in public trains. 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids.
Academic chapter/article/Conference paper
Hafner, Armin; Ladam, Yves; Andresen, Trond; Nekså, Petter. (2010) Experimental investigation of different ejector geometries for R-744 transcritical systems. 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2007) Global environmental and economic benefits of introducing R-744 mobile air conditioning. Proceedings : 22nd International Congress of Refrigeration : Refrigeration creates the future.
Academic chapter/article/Conference paper
Stene, Jørn; Andresen, Trond; Skiple, Torgeir; Nekså, Petter. (2007) CO2 Heat pump system for combined heating and cooling of non-residential buildings. Proceedings : 22nd International Congress of Refrigeration : Refrigeration creates the future.
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2006) Global environmental consequences of introducing R-744 (CO2) mobile air conditioning. 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006).
Academic chapter/article/Conference paper
Hafner, Armin; Nekså, Petter. (2006) Globale Konsequenzen bei der Einführung von Fahrzeugklimaanlagen mit dem Kältemittel R-744. Deutsche Kälte-Klima-Tagung 2006 Dresden.
Academic chapter/article/Conference paper
Nekså, Petter. (2006) Performance of CO2-refrigeration (R-744) in commercial cold drink equipment. 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006).
Academic chapter/article/Conference paper
Nekså, Petter. (2005) Refrigeration sector. IPCC/TEAP special report on safeguarding the ozone layer and the global climate system : issues related to hydrofluorocarbons and perfluorocarbons.
Academic chapter/article/Conference paper
Jakobsen, Arne; Skaugen, Geir; Skiple, Torgeir; Nekså, Petter; Andresen, Trond. (2004) Development and Evaluation of a Reversible CO2 Residential Air Conditioning System Compared to State-of-the-Art R410A Unit. 6th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2004).
Academic chapter/article/Conference paper

Report

Abdelaziz, Omar; Carvalho, Suely; Woodcock, Ashley; Agyarko, Kofi; Altoé, Paulo; Bhambure, Jitendra; Colbourne, Daniel; Dohnt, Hilde; Dreyfus, Gabrielle; Elassaad, Bassam; Gluckman, Ray; Hamed, Samir; Herlianika, Herlin; Kujak, Steven; Kumar, Saurabh; Li, Tingxun; Lord, Richard; Nekså, Petter; Okada, Tetsuji; Olama, Mohamed Alaa; Peixoto, Roberto; Shah, Nihar; Rajendran, Rajan; Rochat, Helene. (2022) Montreal protocol on substances that deplete the ozon layer: report of the Technology and Economic Assessment Panel. Volume 3: Decision XXXIII/5 - Continued provision of information on energy-efficient and low-global-warming-potential technologies. United Nations Environment Programme. 2022. ISBN 978-9966-076-95-3.
Report
Abdelaziz, Omar; Elassaad, Bassam; Bhambure, Jitendra; Kuijpers, Lambert J.M.; Nekså, Petter; Pachai, Alexander C.; Peixoto, Roberto; Polonara, Fabio; Rajendran, N.. (2021) Montreal Protocol on Substances that Deplete the Ozone Layer : Report of the Refrigeration Technical Options Committee Vaccines Cold Chain Subcommittee Addendum to the TEAP 2021 Progress Report. United Nations Environment Programme. 2021. ISBN 978-9966-076-90-8.
Report
Tomasgard, Asgeir; Berstad, David Olsson; Blekkan, Edd Anders; Karstad, Per Ivar; Burheim, Odne Stokke; Dawson, James; Espegren, Kari Aamodt; Løvås, Terese; Meyer, Julien; Møller-Holst, Steffen; Nekså, Petter; Pollet, Bruno; Størset, Sigmund Østtveit; Sundseth, Kyrre; Thomassen, Magnus; Ulleberg, Øystein. (2019) Hydrogen i fremtidens lavkarbonsamfunn. 2019. ISBN 978-82-93198-31-4.
Report
Ervik, Åsmund; Saai, Afaf; Meyer, Ole; Nekså, Petter. (2018) Modelling of mechanical and flow processes in compressors. 2018.
Report
Haukås, Hans T.; Stene, Jørn; Rekstad, Inge Håvard; Nekså, Petter; Hafner, Armin; Eikevik, Trygve Magne. (2016) CO2 (R744) som kuldemedium. 2016.
Compendium
Elgsæther, Munan; Nekså, Petter; Skaugen, Geir; Rekstad, Håvard. (2002) CO2 as refrigerant in beverage coolers, Evaluation and prototype testing. 2002. SINTEF Rapport (TRF5738).
Report
Pettersen, Jostein; Nekså, Petter; Rekstad, Håvard. (2002) Testing and evaluation of a condensing unit in a residential air conditioning system. 2002. SINTEF Rapport (TRF5686).
Report
Rekstad, Håvard; Nekså, Petter. (2002) Testing and evaluation of CO2 compressors for the NBC project. Item 2. Compresosr tests at SINTEF. 2002. SINTEF Rapport (TRF5717).
Report
Nekså, Petter; Bredesen, Arne Mathias. (2000) Short Course on CO2 Refrigeration Technology (SC7). 2000.
Compendium
Rekstad, Håvard; Nekså, Petter; Bredesen, Arne Mathias. (1999) Measurements on semi-hermetic pre-series CO2 compressors. 1999. ISBN 82-594-1675-1.
Report
Haukås, Hans; Brendeng, Einar; Lorentzen, Gustav; Owren, Geir; Nekså, Petter; Aflekt, Kåre; Jørstad, Oddvar; Lystad, Tor; Nesje, Odd; Sandbakk, Marit. (1994) KFK-fri teknologi for kuldeanlegg og varmepumper : kompendiesamling nytt EEU-kurs. 1994.
Compendium
Nekså, Petter. (1994) Erstatningsmedier for HKFK-22. 1994.
Compendium

PRODUKT

Røkke, Petter Egil; Nekså, Petter. (2021) Episode 393 – Om varmetap med Petter Røkke og Petter Nekså. Teknisk ukeblad. 2021.
Sound material
Nekså, Petter. (2020) How CO2 Can Help The Climate. SINTEF Energi AS. 2020.
Multimedia product
Nekså, Petter. (2020) Hydrogen can contribute to decarbonizing the European energy system. SINTEF Energi. 2020.
Multimedia product
Nekså, Petter. (2020) Norsk teknologi kan kutte 0,5 grader global oppvarming!. SINTEF Energi. 2020.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep1: Utnytte industriell overskuddsvarme. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep1: Utnytte industriell overskuddsvarme. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep2: Hvor bruker man arbeidsmedier?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep2: Hvor bruker man arbeidsmedier?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep3: Er kunstige arbeidsmedier egentlig så farlige?. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep3: Er kunstige arbeidsmedier egentlig så farlige?. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep4: CO2 som arbeidsmedium. SINTEF Energi, Facebook. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep4: CO2 som kuldemedium. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep5: Arbeidsmedier og overskuddsvarme. SINTEF Energi. 2018.
Multimedia product
Nekså, Petter. (2018) Naturlige arbeidsmedier Ep5: Konvertering av overskuddsvarme. SINTEF Energi, Facebook. 2018.
Multimedia product

INFORMASJONSMATR

Nekså, Petter. (2022) Bør jeg kjøpe varmepumpe? Vil det lønne seg?.
Website (informational material)
Røkke, Petter Egil; Kauko, Hanne; Nekså, Petter. (2022) Industrial neighbours can share excess energy.
Website (informational material)
Gardarsdottir, Stefania Osk; Nekså, Petter. (2021) Assumptions Matter When Assessing Blue & Green Hydrogen.
Website (informational material)
Røkke, Petter Egil; Kauko, Hanne; Nekså, Petter. (2021) Industrinaboer kan dele overskuddsenergi.
Website (informational material)
Berstad, David Olsson; Nekså, Petter. (2018) Ambisiøse planer for hydrogen i Japan.
Website (informational material)
Nekså, Petter. (2017) FN-møte i Jordan for å fase ut klimagasser.
Website (informational material)
Nekså, Petter. (2016) What is the role for gas in the future?.
Website (informational material)
Jordal, Kristin; Berstad, David Olsson; Nekså, Petter. (2015) Hydrogen cars: The role of fossil fuels and CCS in a cleaner transport system.
Website (informational material)
Jordal, Kristin; Berstad, David Olsson; Nekså, Petter. (2015) The role of fossil fuels and CCS in a cleaner transport system.
Website (informational material)
Nekså, Petter. (2015) Energisk mellom Japan og Norge.
Briefs

Teaching

Courses

Media

2023

Interview

Nekså, Petter. (2023) Forsker og jazz-ildsjel fikk pris. Adresseavisen [Avis]. 2023-03-15.

2022

Interview

Nekså, Petter. (2022) 20 Twh overskuddsvarme slippes rett ut. Norsk Fjernvarme [Fagblad]. 2022-09-09.
Interview

Nekså, Petter. (2022) Consumer, Power | These power-saving measures have no effect in practice. Archenewsy [Internett]. 2022-11-08.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Nettavisen [Avis]. 2022-11-04.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Sandnesposten [Avis]. 2022-11-04.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Jærbladet [Avis]. 2022-11-04.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Nordlys [Avis]. 2022-11-04.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Telemarksavisa [Avis]. 2022-11-05.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Gudgransdølen Dagningen [Avis]. 2022-11-05.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Oppland Arbeiderblad [Avis]. 2022-11-05.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Tidens krav [Internett]. 2022-11-05.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Arbeidets Rett [Avis]. 2022-11-05.
Interview

Nekså, Petter. (2022) Disse strømspare-tiltakene har i praksis ingen effekt. Fredrikstad Blad [Avis]. 2022-11-06.
Interview

Nekså, Petter. (2022) Disse strømsparetiltakene har i praksis ingen effekt. Moss Avis [Avis]. 2022-11-14.
Interview

Nekså, Petter. (2022) Disse strømsparetiltakene har i praksis ingen effekt. Vestby Avis [Avis]. 2022-11-10.
Interview

Nekså, Petter. (2022) Industrien fyrer for kråkene. Aftenposten [Avis]. 2022-09-10.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. MN24 [Fagblad]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Dagens Perspektiv [Avis]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Byggeindustrien [Fagblad]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. DN [Avis]. 2022-09-19.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Stavanger Aftenblad [Avis]. 2022-09-10.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Adresseavisen [Avis]. 2022-09-10.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Oppland Arbeiderblad [Avis]. 2022-09-10.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. Fremover [Internett]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer fortsatt for kråkene. NRK [Internett]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer framleis for kråkene. Kvinnheringen [Avis]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer framleis for kråkene. Nordre [Avis]. 2022-09-09.
Interview

Nekså, Petter. (2022) Norsk industri fyrer framleis for kråkene. Møre-nytt [Avis]. 2022-09-12.
Interview

Nekså, Petter. (2022) Sett aldri varmepumpa på «Auto». TU [Fagblad]. 2022-06-18.
Interview

Nekså, Petter. (2022) Sett aldri varmepumpa på «auto». Fagpressenytt [Internett]. 2022-06-16.
Interview

Nekså, Petter. (2022) Sett aldri varmepumpa på «auto». forskersonen [Internett]. 2022-06-16.
Interview

Nekså, Petter. (2022) Strømkrisen til tross – industrien fyrer for kråkene. TU [Fagblad]. 2022-09-09.
Interview

Nekså, Petter; Røkke, Petter Egil. (2022) 20 Twh overskuddsvarme slippes rett ut. Norsk fjernvarme [Fagblad]. 2022-09-09.

2021

Academic lecture

Ervik, Åsmund; Saai, Afaf; Berstad, Torodd; Meyer, Ole; Tsuji, Takuma; Oku, Tatsuya; Hattori, Kazuhiro; Yamada, Kazuya; Delhaye, Virgile Roger; Nekså, Petter. (2021) Modelling the dynamics of ring plate valves in reciprocating compressors using coupled CFD-FEM simulations. 10th International Conference on Compressors and Coolants . Slovak Association for Cooling and Air Conditioning Tech.; 2021-01-13 - 2021-01-15.
Interview

Nekså, Petter. (2021) Millilardprosjekt skal gjera Barents-gass til ein del av klimaløysinga. Stavanger Aftenblad [Avis]. 2021-06-01.
Interview

Røkke, Petter Egil; Nekså, Petter. (2021) Norge mister 20 TWh årlig i varmetap – disse forskerne vil bruke energien i stedet. null [Fagblad]. 2021-11-04.
Interview

Røkke, Petter Egil; Nekså, Petter; Knudsen, Brage Rugstad. (2021) Vi kan bruke spillvarme til å lage norske avokadofarmer. Dagens Næringslilv [Avis]. 2021-03-25.

2020

Interview

Nekså, Petter. (2020) Bedre HVAC-systemer kan hjelpe hotellnæringen. VVS Aktuelt [Fagblad]. 2020-06-17.
Interview

Nekså, Petter. (2020) Historien om CO2 som kjølemedium. sintef.no [Internett]. 2020-06-03.
Interview

Nekså, Petter. (2020) Norske hoteller kan redusere strømregningen med hele 44 prosent. ITBA Aktuelt [Internett]. 2020-06-18.
Interview

Nekså, Petter. (2020) Slik kan hotellene halvere strømregningen. enerWE [Fagblad]. 2020-06-17.
Interview

Nekså, Petter. (2020) Standard for brannfarlige kuldemedier i varmepumper til avstemning. VVSFORUM [Fagblad]. 2020-10-21.
Interview

Nekså, Petter. (2020) Standard for brannfarlige kuldemedier i varmepumper til avstemning. VVS aktuelt [Fagblad]. 2020-10-21.
Interview

Nekså, Petter. (2020) The story of CO2 as a refrigerant. sintef.no [Internett]. 2020-04-20.
Lecture

Nekså, Petter; Andresen, Trond. (2020) FME HighEFF – Anlegg for utnyttelse av overskuddsvarme til kraftproduksjon. Norsk Kjøleteknisk Møte 2020 . Norsk Kjøleteknisk Forening - Tekna; Clarion Hotell og Konferansesenter, Trondheim. 2020-10-29 - 2020-10-29.
Lecture

Nikolaisen, Monika; Nekså, Petter. (2020) Measuring achievement of the HighEFF overall goals. HighEFF Annual Consortium Meeting 2020 ; 2020-05-13 - 2020-05-13.

2019

Lecture

Ervik, Åsmund; Saai, Afaf; Meyer, Ole; Nekså, Petter. (2019) Dynamic modelling of compressor ring plate valve behaviour with CFD and FEM. HighEFF Annual Consortium Meeting 2019 . SINTEF Energi; Trondheim. 2019-05-08 - 2019-05-09.
Interview

Nekså, Petter. (2019) Skal berge skiløypene. NRK [Internett]. 2019-04-15.
Interview

Nekså, Petter. (2019) VM-stadionet forurenser like mye hver dag som å kjøre bil 20 ganger rundt ekvator. NRK [Internett]. 2019-10-04.
Lecture

Skjervold, Vidar T.; Andresen, Trond; Skaugen, Geir; Nekså, Petter. (2019) Novel heat recovery concept development. Practical vs. Academic approach to Energy Recovery ; 2019-10-22.

2018

Academic lecture

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Schlemminger, Christian; Dallai, Mauro. (2018) Experimental Investigation of a Hydrocarbon Piston Compressor for High Temperature Heat Pumps. 24th International Compressor Engineering Conference ; Purdue. 2018-07-12.
Academic lecture

Berstad, David Olsson; Anantharaman, Rahul; Wilhelmsen, Øivind; Skjervold, Vidar T.; Nekså, Petter. (2018) Large-Scale Hydrogen Production and Liquefaction for Regional and Global Export. International Hydrogen and Fuel Cells Conference . SINTEF, NTNU; Trondheim. 2018-05-14 - 2018-05-15.
Lecture

Berstad, David Olsson; Nekså, Petter; Størset, Sigmund Østtveit. (2018) Large-scale decarbonised hydrogen production. Offshore Northern Seas (ONS) 2018 ; 2018-08-27 - 2018-08-30.
Poster

Berstad, David Olsson; Wilhelmsen, Øivind; Voldsund, Mari; Nekså, Petter; Ishimoto, Yuki. (2018) Large-scale co-production of liquid hydrogen from fossil and renewable energy. 22nd World Hydrogen Energy Conference ; 2018-06-17 - 2018-06-22.
Lecture

Claussen, Ingrid Camilla; Røyrvik, Jens Olgard Dalseth; Nekså, Petter. (2018) Role of Industry Clusters for improving energy efficiency. 10th KIFEE symposium . Kifee Kyoto Norway Centre; Norwegian Coastal Express/Tromsø. 2018-10-05 - 2018-10-08.
Lecture

Ishimoto, Yuki; Voldsund, Mari; Berstad, David Olsson; Nekså, Petter. (2018) Value chain analysis for long distance transport of hydrogen carriers. 22nd World Hydrogen Energy Conference ; 2018-06-17.
Lecture

Ishimoto, Yuki; Voldsund, Mari; Berstad, David Olsson; Nekså, Petter; Iida, Shigeki. (2018) Value chain analysis of long-distance hydrogen transport. 10th Kyoto International forum for energy and environment symposium (KIFEE-10) ; 2018-10-05.
Academic lecture

Kauko, Hanne; Selvnes, Håkon; Knudsen, Brage Rugstad; Hafner, Armin; Nekså, Petter. (2018) Thermal storage for improved energy efficiency in the industry. 10th KIFEE symposium . NTNU og University of Doshisha; MS Finnmarken. 2018-10-05 - 2018-10-08.
Interview

Nekså, Petter. (2018) Det blir mer klimavennlig snø. Skiforbundet [Fagblad]. 2018-12-11.
Interview

Nekså, Petter. (2018) We skiën tegen de klippen op. trouw.nl [Fagblad]. 2018-12-02.
Interview

Nekså, Petter; Berstad, David Olsson; Størset, Sigmund Østtveit. (2018) Fossil hjelp til grønt skifte. Dagens Næringsliv [Avis]. 2018-05-25.

2017

Lecture

Andresen, Trond; Nekså, Petter. (2017) Thermodynamics for dummies. HighEff Annual Consortium Meeting 2017 . SINTEF Energi AS; Trondheim. 2017-06-19 - 2017-06-20.
Lecture

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael. (2017) Extending ammonia high temperature heat pump using butane in a cascade system. 7th Conference on Ammonia and CO2 Refrigeration Technologies . Faculty of Mechanical Engineering - Skopje; Ohrid. 2017-05-11 - 2017-05-13.
Lecture

Bamigbetan, Opeyemi Olayinka; Eikevik, Trygve Magne; Nekså, Petter; Bantle, Michael; Banasiak, Krzysztof. (2017) Extending Hydrocarbon Heat Pumps to Higher Temperatures: Predictions from Simulations. 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems ; San Diego. 2017-07-02 - 2017-07-06.
Academic lecture

Berstad, David Olsson; Wilhelmsen, Øivind; Skjervold, Vidar T.; Nekså, Petter. (2017) Cryogenic CO2 condensation and membrane separation of syngas for large-scale LH2 production. 14th CRYOGENICS 2017 IIR International Conference . IIR; Dresden. 2017-05-15 - 2017-05-19.
Academic lecture

Clos, Daniel Perez; Gaertner, Heiko; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2017) DESIGN OF A COOLED FOULING PROBE TO INVESTIGATE SCALING MECHANISMS FROM THE ALUMINIUM PRODUCTION OFF-GAS. Heat Exchanger Fouling and Cleaning XII . HTRI; Madrid. 2017-06-11 - 2017-06-16.
Academic lecture

Clos, Daniel Perez; Nekså, Petter. (2017) Heat recovery from Al off-gases. SFI høst møte 2017 . NTNU-IMA; Trondheim. 2017-11-07 - 2017-11-08.
Academic lecture

Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2017) Scaling in Heat Recovery Systems for Aluminium Production Off-Gas. SFI vår møte 2017 ; 2017-04-25 - 2017-04-26.
Academic lecture

Kauko, Hanne; Nordtvedt, Stein Rune; Nekså, Petter; Bantle, Michael. (2017) High-temperature heat pumps based on natural working fluids to produce district heating from industrial waste heat. 7th Conference on Ammonia and CO2 Refrigeration Technologies . International Institute of Refrigeration (IIR); Ohrid. 2017-05-11 - 2017-05-13.
Interview

Nekså, Petter. (2017) - Vet at alle i skisporten er opptatt av snøtilgang. Adresseavisen [Avis]. 2017-11-14.
Interview

Nekså, Petter. (2017) A Norwegian project: Snow for the future. JARN [Internett]. 2017-06-06.
Interview

Nekså, Petter. (2017) A future for skiing in a warmer world. Science Daily [Tidsskrift]. 2017-02-01.
Interview

Nekså, Petter. (2017) A future for skiing in a warmer world. AlphaGalileo [Tidsskrift]. 2017-02-01.
Interview

Nekså, Petter. (2017) «Det var alltid veldig mye snø da jeg var liten». Fredrikstad blad [Avis]. 2017-01-28.
Interview

Nekså, Petter. (2017) Erik Røste, skipresident, Norges skiforbund, er bekymret for fremtiden. NRK Dagsrevyen [TV]. 2017-01-28.
Interview

Nekså, Petter. (2017) Får millioner for å lage snø i varmen. E24 [Avis]. 2017-02-04.
Academic lecture

Nekså, Petter. (2017) GAS TO MARKET –HOW TO OVERCOME THE DISTANCE FROM REMOTE PRODUCTION. Arctic Frontiers - The Offshore Arctic under Lower Oil Prices . Arctic Frontiers and IEA Global Techn Coll. Progr. (IEA GOT); Tromsø. 2017-01-25 - 2017-01-26.
Interview

Nekså, Petter. (2017) Klimaforsker: – Det var lengre vintre og mer snø før. amta.no [Internett]. 2017-01-28.
Interview

Nekså, Petter. (2017) Kolumne "nachgeforscht": Grüner gleiten. Maerkische Oderzeitung [Fagblad]. 2017-03-20.
Interview

Nekså, Petter. (2017) Kolumne "nachgeforscht": Grüner gleiten. Märkische online zeitung [Fagblad]. 2017-02-11.
Interview

Nekså, Petter. (2017) Kuldeteknikk. TV2 Nyhetskanalen [TV]. 2017-02-22.
Lecture

Nekså, Petter. (2017) Low carbon solutions for the blue economy: The role of technology and innovation. Arctic Frontiers, Arctic Environment Forum . Arctic Frontiers Secretariat; Tromsø. 2017-01-23 - 2017-01-26.
Interview

Nekså, Petter. (2017) MØRKE UTSIKTER. Dagbladet Magasinet [Avis]. 2017-04-08.
Interview

Nekså, Petter. (2017) Norway saves skiing with climate-friendly snow. Scandinavian Times [Avis]. 2017-02-12.
Interview

Nekså, Petter. (2017) Norway saves skiing with climate-friendly snow. Environmentalresearchweb [Internett]. 2017-02-16.
Interview

Nekså, Petter. (2017) Norwegian eco snow machines secure the future of skiing. Association Iinternationale de la Presse Sportive [Fagblad]. 2017-02-17.
Interview

Nekså, Petter. (2017) Skisporten skal reddes med snøproduksjon. sportsbransjen.no [Internett]. 2017-01-25.
Interview

Nekså, Petter. (2017) Will future skiers rely on heat pumps?. CoolingPost [Fagblad]. 2017-02-15.
Lecture

Nekså, Petter; Berstad, David Olsson. (2017) Hyper, potential for large scale hydrogen production for export from Norway. Japan-Norway Hydrogen seminar “Collaboration within hydrogen future market and value chain” . Norges forskningsråd, Innovasjon Norge, Norges amb. i Japan; Tokyo. 2017-02-28 - 2017-02-28.
Lecture

Nekså, Petter; Berstad, David Olsson; Størset, Sigmund Østtveit. (2017) Large scale hydrogen production from natural gas in Norway - a possibility for sustainable value creation based on Norwegian energy resources. Smart Gas 2017 . Tekna; Oslo. 2017-05-10 - 2017-05-11.
Lecture

Nekså, Petter; Fosso, Olav B. (2017) Strategic Research Area 2014-2023 NTNU ENERGY. Norway-Japan KIFEE-9, Symposium 2017 . KIFEE, Doshisha University; Kyoto. 2017-03-07 - 2017-03-10.
Lecture

Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2017) FME HighEFF-Centre for an Energy Efficient and Competitive Industry for the Future –aktivitet relatert til norsk kjølebransje. Norsk Kjøleteknisk Møte 2017 . Norsk Kjøleteknisk Forening - Tekna; Trondheim. 2017-04-20 - 2017-04-21.
Lecture

Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2017) HighEFF-Centre for an Energy Efficient and Competitive Industry for the Future. Norway-Japan KIFEE-9 Symposium 2017 . KIFEE, Doshisha University; Kyoto. 2017-03-07 - 2017-03-10.
Interview

Nekså, Petter; Røkke, Nils Anders. (2017) Klimaændringer truer Norges nationalsport: Nu vil nordmændene opfinde ’grøn’ kunstsne. DR.dk [Internett]. 2017-01-19.
Interview

Nekså, Petter; Stang, Hans Georg Jacob. (2017) Norwegian eco snow machines secure the future of skiing. Climateaction.org [Internett]. 2017-02-13.
Interview

Nekså, Petter; Stang, Jacob H; Eikevik, Trygve Magne. (2017) A future for skiing in a warmer world. geminiresearchnews.com [Tidsskrift]. 2017-02-02.
Interview

Røkke, Nils Anders; Nekså, Petter. (2017) Skal redde skisporten – i plussgrader. abc nyheter [Internett]. 2017-01-19.
Academic lecture

Wilhelmsen, Øivind; Skaugen, Geir; Berstad, David Olsson; Aasen, Ailo; Nekså, Petter. (2017) Understanding the physical phenomena that occur inside heat exchangers for liquefaction of hydrogen. 14th CRYOGENICS 2017 IIR International Conference . IIR; Dresden. 2017-05-15 - 2017-05-19.

2016

Interview

Bantle, Michael; Nekså, Petter; Benjaminsen, Christina. (2016) Gjør gull av spillvarme. Kule og Varmepumper [Fagblad]. 2016-04-01.
Lecture

Berstad, David Olsson; Nekså, Petter. (2016) Liquefied hydrogen production from surplus wind/hydro power and fossil sources in Norway. Hydrogenkonferanse Sogn og Fjordane 2016 . Maritim Forening Sogn og Fjordane m.fl.; Florø. 2016-10-19 - 2016-10-20.
Academic lecture

Berstad, David Olsson; Nekså, Petter; Voldsund, Mari; Wilhelmsen, Øivind; Korpås, Magnus. (2016) Liquefied Hydrogen Production and Export in Norway. 4th Trondheim Gas Technology Conference . The Gas Technology Centre NTNU-SINTEF; Trondheim. 2016-12-05 - 2016-12-05.
Academic lecture

Berstad, David Olsson; Roussanaly, Simon; Anantharaman, Rahul; Nekså, Petter; Jakobsen, Jana Poplsteinova. (2016) Techno-economic evaluation of a low-temperature CO2 capture unit for IGCC Plants. 22nd International Congress of Chemical and Process Engineering ; 2016-08-27 - 2016-08-31.
Academic lecture

Berstad, David Olsson; Roussanaly, Simon; Anantharaman, Rahul; Nekså, Petter; Jakobsen, Jana Poplsteinova. (2016) Techno-economic evaluation of a low-temperature CO2 capture unit for IGCC Plants. 8th International Freiberg Conference on IGCC & XtL Technologies ; 2016-06-12 - 2016-06-16.
Academic lecture

Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth. (2016) PhD Heat recovery from Al pot gas and scaling issues. SFI høst møte 2016 ; 2016-10-25 - 2016-10-26.
Academic lecture

Nekså, Petter. (2016) CO2 in the Commercial Refrigeration Sector, Including High Ambient Temperatures. MOP 28 Kigali, Side event: Opportunities for A5 Countries to Leapfrog to Long-Term Sustainable Alternatives Based on Natural Refrigerants . Joint Indo-Norwegian arranged side-event; Kigali. 2016-10-13 - 2016-10-13.
Lecture

Nekså, Petter. (2016) HighEFF Work Plans. FME HighEFF Kick-off . SINTEF Energy Research; Gardermoen. 2016-11-28 - 2016-11-28.
Lecture

Nekså, Petter. (2016) HighEFF, energiforskning for industriell, grønn konkurransekraft. Industri 2016 . Norsk Industri; Bodø. 2016-09-28 - 2016-09-29.
Interview

Nekså, Petter. (2016) Hydrogenvei til Japan. Energi og Klima.no [Internett]. 2016-06-14.
Interview

Nekså, Petter. (2016) NEL ASA starts feasibility study for large-scale hydrogen production in Norway. CTBR Energy Management Transport Sustainability [Internett]. 2016-04-05.
Interview

Nekså, Petter. (2016) NEL announces initiation of feasibility partner study for large-scale hydrogen production in Norway. Bloomberg [Internett]. 2016-04-15.
Interview

Nekså, Petter. (2016) Nel Asa Initiates Feasibility Study for Hydrogen Export. Process wordwide [Fagblad]. 2016-04-20.
Interview

Nekså, Petter. (2016) Nå kan Norge få storstilt produksjon av hydrogen. sysla grønn [Fagblad]. 2016-04-14.
Interview

Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2016) - La naturens egne stoffer overta som kjølegasser. ITBAktuelt [Internett]. 2016-10-28.
Interview

Nekså, Petter; Hemmingsen, Anne Karin Torstveit. (2016) CO2 gir grønn kjøling. GEMINI [Fagblad]. 2016-10-21.

2015

Interview

Benjaminsen, Christina; Bantle, Michael; Nekså, Petter. (2015) Gjør gull av spillvarme. byggfakta.no [Internett]. 2015-07-09.
Interview

Benjaminsen, Christina; Bantle, Michael; Nekså, Petter. (2015) Gjør gull av spillvarme. petro.no [Internett]. 2015-07-07.
Interview

Bergh, Nicholas; Løfaldi, Reidar; Nekså, Petter. (2015) Norske klimaeksperter skal redde skisporten. Aftenposten side 19-20 [Avis]. 2015-03-05.
Lecture

Berstad, David Olsson; Roussanaly, Simon; Skaugen, Geir; Anantharaman, Rahul; Nekså, Petter; Jordal, Kristin; Jakobsen, Jana Poplsteinova. (2015) Energy and cost evaluation of a low-temperature CO2 capture unit for IGCC plants. Pittsburgh Coal Conference . University Of Pittsburgh; Pittsburgh. 2015-10-05 - 2015-10-08.
Academic lecture

Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin. (2015) Investigation on CO2 ground-coupled heat pumping system for buildings under cold climate. Proceedings of 8th International Cold Climate HVAC Conference ; 2015-10-20 - 2015-10-23.
Lecture

Nekså, Petter. (2015) Conversion of surplus heat in industry. Japan-Norway Energy Science Week 2015 . Norwegian Embassy, The Research Council of Norway, SIU, IN; Tokyo Int Exchange Center. 2015-05-27 - 2015-05-28.
Lecture

Nekså, Petter. (2015) Non-HFC refrigerants in small and medium-sized air-conditioning and heat pump systems. Workshop on Management of HFCs: Technical Issues . UNEP; Bangkok. 2015-04-20 - 2015-04-21.
Lecture

Nekså, Petter. (2015) Sites and concepts for possible hydrogen production and export from Norway. Japan-Norway Energy Science Week 2015 . Norwegian Embassy, Research Council of Norway, SIU, IN; Tokyo Int Exchange Center. 2015-05-27 - 2015-05-28.

2014

Academic lecture

Berstad, David Olsson; Lindqvist, Karl; Nekså, Petter; Roussanaly, Simon. (2014) Natural gas sweetening by additive-aided extractive distillation for CO2 freezing point depression. 3rd Trondheim Gas Technology Conference ; 2014-06-04 - 2014-06-05.
Lecture

Berstad, David Olsson; Roussanaly, Simon; Skaugen, Geir; Anantharaman, Rahul; Nekså, Petter; Jordal, Kristin. (2014) Energy and cost evaluation of a low-temperature CO2 capture unit for IGCC plants. GHGT-12 . IEAGHG; Austin, TX. 2014-10-05 - 2014-10-09.
Academic lecture

Jordal, Kristin; Anantharaman, Rahul; Peters, Thijs; Berstad, David Olsson; Morud, John Christian; Nekså, Petter; Bredesen, Rune. (2014) High‐purity H2 production with CO2 capture based on coal gasification. 27th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems ; Turku. 2014-06-15 - 2014-06-19.
Lecture

Roussanaly, Simon; Anantharaman, Rahul; lindqvist, karl; Nekså, Petter. (2014) Multi-criteria analyses of two solvent and one low-temperature concepts for acid gas removal from natural gas. Trondheim Gas Technology Conference 3 . SINTEF Energy Research; Trondheim. 2014-06-04 - 2014-06-05.
Academic lecture

Skaugen, Geir; Walnum, Harald Taxt; Hagen, Brede Andre Larsen; Clos, Daniel Perez; Mazzetti, Marit Jagtoyen; Nekså, Petter. (2014) DESIGN AND OPTIMIZATION OF WASTE HEAT RECOVERY UNIT USING CARBON DIOXIDE AS COOLING FLUID. ASME Power 2014 Conference . ASME; Baltimore, Maryland. 2014-07-28 - 2014-07-31.
Academic lecture

Yamaguchi, Hiroshi; Iwamoto, Yuhiro; Ozaki, S; Nekså, Petter. (2014) EXPERIMENTAL OBSERVATION OF SEDIMENTATION PHENOMENA OF CO2 DRY ICE IN MODEL CHANNEL. 11th IIR-Gustav Lorentzen Conference on Natural Refrigerants GL2014 . International Institute of Refrigeration; Hangzhou. 2014-08-31 - 2014-09-02.

2013

Academic lecture

Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2013) Integrated low-temperature CO2 capture from IGCC power plant by partial condensation and separation of syngas. 16th Conference Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES13) ; Rhodos. 2013-09-29 - 2013-10-02.
Academic lecture

Mazzetti, Marit Jagtoyen; Nekså, Petter; Walnum, Harald Taxt; Hemmingsen, Anne Karin. (2013) Novel Energy Efficiency Technologies for Reduction of Offshore CO2 Emissions. OTC 2013 . OTC; Houston. 2013-05-06 - 2013-05-08.

2012

Poster

Berstad, David Olsson; Anantharaman, Rahul; Nekså, Petter. (2012) Low-temperature CCS from an IGCC power plant and comparison with physical solvents. 11th International Conference on Greenhouse Gas Control Technologies (GHGT-11) . IEAGHG; Kyoto. 2012-11-18 - 2012-11-22.
Poster

Berstad, David Olsson; Quack, Hans; Walnum, Harald Taxt; Drescher, Michael; Stang, Hans Georg Jacob; Nekså, Petter; Haberstroh, Christoph; Decker, Lutz; Michael, Börsch; Holdener, Fridolin. (2012) Design Principles for High-Efficiency Hydrogen Liquefaction Processes. World Hydrogen Energy Conference 2012 ; 2012-06-03 - 2012-06-07.
Academic lecture

Hafner, Armin; Poppi, Stefano; Nekså, Petter; Eikevik, Trygve Magne; Minetto, Silvia. (2012) Development of Commersial Refrigeration Systems with Heat Recovery for Supermaket Buildings. 10th Gustav Lorentzen Conference on Natural Working Fluids . International Institute of Refrigeration; Delfts. 2012-06-24 - 2012-06-24.
Academic lecture

Hafner, Armin; Schmälzle, Christian; Nekså, Petter; Obrist, Frank; Rekstad, Inge Håvard. (2012) High Efficient 100 kW(el) R744 Compressor. 10th IIR Gustav Lorentzen Conference on Natural Refrigerants . International Institute of Refigeration (IIR); Delft. 2012-06-24 - 2012-06-27.
Academic lecture

Nekså, Petter; Stolzenburg, Klaus. (2012) Making Hydrogen Liquefaction more competitive: Overview of the Project and of the Supply Pathways considered. World Hydrogen Energy Conference (WHEC) ; Toronto. 2012-06-03 - 2012-06-07.
Academic lecture

Quack, Hans; Essler, Jürgen; Haberstroh, Christoph; Walnum, Harald Taxt; Berstad, David Olsson; Drescher, Michael; Nekså, Petter. (2012) Search for the Best Processes to Liquefy Hydrogen in Very Large Plants. IIR Cryogenics 2012 ; Dresden. 2012-09-11 - 2012-09-14.
Poster

Quack, Hans; Haberstroh, Christoph; Essler, Jürgen; Nekså, Petter; Berstad, David Olsson; Drescher, Michael; Stang, Hans Georg Jacob; Walnum, Harald Taxt; Decker, Lutz; Treite, Phillip. (2012) Boundary Conditions and assumptions Influencing the Power Needed to Liquefy Hydrogen. World Hydrogen Energy Conference 2012 ; 2012-06-03 - 2012-06-07.
Academic lecture

Walnum, Harald Taxt; Berstad, David Olsson; Nekså, Petter; Drescher, Michael; Quack, Hans; Haberstroh, Christoph; Essler, Jürgen. (2012) Principles for the Liquefaction of Hydrogen with Emphasis on Precooling Processes. IIR Cryogenics 2012 ; Dresden. 2012-09-11.
Poster

Walnum, Harald Taxt; Berstad, David Olsson; Nekså, Petter; Drescher, Michael; Stang, Hans Georg Jacob. (2012) Mixed Refrigerants for High Efficiency Hydrogen Pre-cooling. World Hydrogen Energy Conference 2012 ; 2012-06-03.

2011

Academic lecture

Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) CO2 capture from IGCC by low-temperature syngas separation and partial condensation of CO2. The 6th Trondheim CCS Conference . SINTEF Energi AS; Trondheim. 2011-06-14 - 2011-06-16.
Academic lecture

Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) CO2 capture from IGCC by lowtemperature syngas separation and partial condensation of CO2. 6th Trondheim CCS Conference . SINTEF Energi; Trondheim. 2011-06-14 - 2011-06-16.
Academic lecture

Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) Potential for low-temperature capture technologies in different CCS applications. The 6th Trondheim CCS Conference . SINTEF Energi AS; Trondheim. 2011-06-14 - 2011-06-16.
Academic lecture

Berstad, David Olsson; Nekså, Petter; Anantharaman, Rahul. (2011) Potential for low-temperature capture technologies in different CCS applications. 6th Trondheim CCS Conference . SINTEF Energi; Trondheim. 2011-06-14 - 2011-06-16.
Academic lecture

Berstad, David Olsson; Roussanaly, Simon; Nekså, Petter; Anantharaman, Rahul. (2011) Low temperature CO2 removal from natural gas. 2nd Trondheim Gas Technology Conference . The Gas Technology Centre NTNU-SINTEF; Trondheim. 2011-11-02 - 2011-11-03.
Academic lecture

Berstad, David Olsson; Roussanaly, Simon; Nekså, Petter; Anantharaman, Rahul. (2011) Low-temperature CO2 removal from natural gas. 2nd Trondheim Gas Technology Conference . Gas Technology Centre NTNU-SINTEF; Trondheim. 2011-11-02 - 2011-11-03.
Academic lecture

Hafner, Armin; Nekså, Petter; Ladam, Yves; Eikevik, Trygve Magne. (2011) Oil-Free R744 Systems for Industrial/Commersial Applications. The 23rd International Congress of Refrigeration . IIR International Institute of Refrigeration; Prague. 2011-08-22 - 2011-08-26.

2009

Academic lecture

Berstad, David Olsson; Stang, Hans Georg Jacob; Nekså, Petter. (2009) A future energy chain based on liquefied hydrogen. Hydrogen and Fuel Cells in the Nordic Countries – 2009 . Norwegian Hydrogen Forum; Oslo. 2009-11-24 - 2009-11-26.
Academic lecture

Berstad, David Olsson; Stang, Hans Georg Jacob; Nekså, Petter. (2009) A future energy chain based on liquefied hydrogen. 1st Trondheim Gas Technology Conference . Gas Technology Centre (NTNU-SINTEF); NOVA. 2009-10-21 - 2009-10-22.
Academic lecture

Nekså, Petter. (2009) CREATIV - Efficient Heating and Cooling. CREATIV Research Workshop . SINTEF Energy Research; Trondheim. 2009-11-23 - 2009-11-23.
Academic lecture

Nekså, Petter. (2009) Japanske husstander varmer opp vann med varmepumper - Hvilke perspektiver gir CO2 som kuldemedium?. Nordiske varmepumpedager 2009 . NOVAP og andre nordiske varmepumpeforeninger; Oslo. 2009-06-04 - 2009-06-05.
Academic lecture

Nekså, Petter. (2009) Refrigeration Technology with CO2 and Other Natural Refrigerants. KIFFE Symposium 2009 . NTNU; Trondheim. 2009-09-07 - 2009-09-09.
Academic lecture

Nekså, Petter; Ladam, Yves. (2009) Spillvarme - en kilde til kraftproduksjon -- Waste heat – a source for power production. Enovas Industrikonferanse 2009 . Enova SF; Trondheim. 2009-11-30 - 2009-12-01.
Academic lecture

Nekså, Petter; Ladam, Yves. (2009) Strømproduksjon fra lavtemperatur spillvarme - Power production from low temperature surplus heat. Energiuka 2009 . NFR, Enova,; Oslo. 2009-02-04 - 2009-02-05.

2008

Academic lecture

Hafner, Armin; Nekså, Petter. (2008) Global environmental & economic benefits of introducing R744 mobile air conditioning. MAC-Summit-Shanghai-2008 ; Shanghai. 2008-01-01 - 2008-01-02.
Academic lecture

Nekså, Petter. (2008) CO2 as Refrigerant, Current and Future Applications and Basic Research Needs. EPRI Workshop to Assess Basic Science Research Needs . Electricity and Power Research Institute EPRI, USA; Charlotte, NC, USA. 2008-01-15 - 2008-01-16.
Academic lecture

Nekså, Petter. (2008) Refrigeration: Perspectives, NH3 and CO2 as natural refrigerants. 2008 Refrigeration Year, AFF-IIR Centenary, 100 years at the service of the development of refrigeration and its applications . International Institute of Refrigeration; Paris, France. 2008-06-12 - 2008-06-12.

2007

Academic lecture

Rekstad, Inge Håvard; Nekså, Petter (SINTEF). (2007) Smøremidler for CO2 anlegg. Kveldsmøte . Norsk Kjøleteknisk Forening; Oslo. 2007-11-01 - 2007-11-01.
Academic lecture

Stene, Jørn; Jakobsen, Arne (SINTEF); Andresen, Trond; Skiple, Torgeir (SINTEF); Nekså, Petter (SINTEF). (2007) CO2 Heat Pump for Combined Heating and Cooling of Non-Residential Buildings. 22nd IIR/IIF International Congress of Refrigeration . International Institute of Refrigeration; Bejing. 2007-08-22 - 2007-08-26.
Academic lecture

Eikevik, Trygve Magne; Rekstad, Håvard (NTNU); Skaugen, Geir (SINTEF); Jakobsen, Arne (SINTEF); Nekså, Petter (SINTEF). (2007) Prototype Liquid Chiller Using Carbon Dioxide as Refrigerant. 22nd International Congress of Refrigeration . China Assisiation of Refrigeration; Beijing. 2007-08-21 - 2007-08-26.
Academic lecture

Hafner, Armin; Nekså, Petter. (2007) Global environmental & economic benefits of introducing R744 mobile air conditioning. 2nd International Workshop on Mobile Air Conditioning and Auxiliary Systems . ATA; Torino. 2007-10-29 - 2007-11-30.

2006

Academic lecture

Hafner, Armin; Nekså, Petter. (2006) Factors influencing life cycle environmental impact calculations of MACs. MAC-Summit-Saafelden-2006 ; Saalfelden. 2006-02-15 - 2006-02-16.

2005

Academic lecture

Zha, Shitong; Hafner, Armin (SINTEF); Nekså, Petter (SINTEF). (2005) Study on Transcritical R-744 (CO2) Voorhees Heat Pump Cycle. IIR International Conference on Commercial Refrigeration, Vicenza . International Institute of Refrigeration (IIR); Vicenza. 2005-08-30 - 2005-08-31.
Academic lecture

Hafner, Armin; Nekså, Petter. (2005) R744 (CO2) Technology Maturity and Availability. Workshop on Technology Cooperation for Next-Generation Mobile Air Conditioning ; New Delhi. 2005-03-03 - 2005-03-05.

2004

Academic lecture

Jakobsen, Arne; Skaugen, Geir; Skiple, Torgeir; Nekså, Petter; Andresen, Trond. (2004) Development and Evaluation of a Reversible CO2 Residential Air Conditioning System Compared to State-of-the-Art R410A Unit. Natural Working Fluids 2004 - 6th Gustav Lorentzen Conference . International Institute of Refrigeration; Glasgow. 2004-08-29 - 2004-09-01.
Academic lecture

Nekså, Petter (SINTEF); Hoggen, Rune Lillethun; Aflekt, Kåre (NTNU); Jakobsen, Arne (SINTEF); Skaugen, Geir (SINTEF). (2004) Fan-less Heat Exchanger Concept for CO2 Heat Pump Systems. Natural Working Fluids 2004 - 6th Gustav Lorentzen Conference . International Institute of Refrigeration - IIR; Glasgow. 2004-08-29 - 2004-09-01.
Academic lecture

Rekstad, Håvard; Nekså, Petter; Pisano, Giacomo; Bredesen, Arne Mathias. (2004) Measurement on a Two-Stage CO2-Compresor. Natural Working Fluids 2004 - 6th Gustav Lorentzen Conference . International Institute of Refrigeration - IIR; Glasogow. 2004-08-29 - 2004-09-01.
Academic lecture

Tøndell, Espen; Bredesen, Arne Mathias; Pettersen, Jostein; Nekså, Petter. (2004) Test Facility and Concept for CO2 Expander. Natural Working Fluids 2004 - 6th Gustav Lorentzen Conference . International Institute of Refrigeration - IIR; Glasgow. 2004-08-29 - 2004-09-01.

2003

Academic lecture

Nekså, Petter; Pettersen, Johan; Skaugen, Geir. (2003) CO2 refrigeration, air conditioning and heat pump technology. X Technologica Innovations in Refrigeration adn Air Conditioning, Milan, June 27-28 2003 . [Mangler data]; Milano. 2003-06-28.
Academic lecture

Nekså, Petter; Pettersen, Jostein; Bredesen, Arne Mathias. (2003) Development of CO2 Refrigeration, Air Conditioning and Heat Pump Technology in Europe. International Conference on Fluid and Thermal Energy Conversion 2003 . [Mangler data]; Bali, Indonesia. 2004-12-12.
Academic lecture

Pettersen, Jostein; Nekså, Petter. (2003) Consequences of the newest improvements in R-744 systems. Automotive alternate refrigerant symposium . [Mangler data]; Phoneix, AX, USA. 2003-07-17.

2002

Academic lecture

Aarlien, Rune; Nekså, Petter; Pettersen, Jostein. (2002) CO2 as working fluid in heat pumping equipment. IEA Heat Pump Conference (7 : 2002 : Beijing) . [Mangler data]; Beijing. 2002-05-22.
Academic lecture

Skaugen, Geir; Nekså, Petter; Pettersen, Jostein. (2002) Simulation of trans-critical vapour compression systems. IIR Gustav Lorentzen Conference on Natural Working Fluids (5 : 2002 : Guangzhou, China) . [Mangler data]; Guangzhou, China. 2002-09-20.

2000

Academic lecture

Aarlien, R.; Pettersen, Jostein; Bredesen, Arne Mathias; Nekså, P.; Adriansyah, Willy. (2000) Use of Carbon Dioxide as Working Fluid - Current Status and Potentials. International Conference on Fluid and Thermal Energy Conversion 2000 (FTEC 2000) . [Mangler data]; Bandung, Indonesia, July 2-6, 2000.
Academic lecture

Nekså, P.; Dorin, F.; Rekstad, Håvard; Bredesen, Arne Mathias. (2000) Development of Two-stage Semi-Hermetic CO2-Compressors". The 4th IIR Gustav Lorentzen Conference on Natural Working Fluids . [Mangler data]; Purdue, West Lafyette, USA, July 25-28 2000.
Academic lecture

Strømmen, Ingvald; Bredesen, Arne Mathias; Eikevik, Trygve Magne; Nekså, Petter; Pettersen, Jostein; Aarlien, Rune. (2000) Varmepumpesystemer for et nytt århundre. Svenska kyltekniska föreningen och kylentreprenörernas förenings årsmøte. . [Mangler data]; Halmstad, Sverige, 12. mai 2000.
Academic lecture

Zakeri, Reza G.; Nekså, Petter; Rekstad, Håvard; Lang-Ree, Kristian; Olsen, Torbjørn. (2000) Results and experiences with the first commercial pilot plant CO2 heat pump water heater. The 4th IIR Gustav Lorentzen Conference on Natural Working Fluids . [Mangler data]; Purdue, West Lafayette, USA, July 25-28, 2000.

1999

Academic lecture

Munkejord, S.T.; Mæhlum, H.S.; Nekså, Petter; Pettersen, Jostein. (1999) Micro Technology in Heat Pumping Systems. 29th International Congress of Refrigeration, IIR/IIF . [Mangler data]; Sydney, Australia, September 1999.
Academic lecture

Nekså, Petter; Dorin, Filippo; Rekstad, Håvard; Bredesen, Arne Mathias; Serbisse, Ahmed. (1999) Development of semi-hermetic CO2-compressors. 20th International Congress of Refrigeration, IIR/IIF . [Mangler data]; Sydney, Australia, September 1999.
Academic lecture

Nekså, Petter; Rekstad, Håvard; Zakeri, G.R.; Schiefloe, P.A.; Svensson, M.Chr.. (1999) Heat pump water heaters with CO%c as working fluid. 6th International Energy Agency Heat Pump Conference 1999 "Heat pumps - a benefit for the environment" . [Mangler data]; Berlin, Tyskland, May 31 - June 2, 1999.
Academic lecture

Nekså, Petter; Rekstad, Håvard; Zakeri, G.Reza; Schiefloe, Per Arne; Svensson, Morten Chr.. (1999) Commercial heat pumps for water heating and heat recovery. CO%c Technology in Refrigeration, Heat Pump and Air Conditioning Systems. CO%c Technology in Refrigeration, Heat pump, and Air Condition Systems . [Mangler data]; Mainz, Tyskland, 18th March, 1999.
Academic lecture

Strømmen, Ingvald; Bredesen, Arne Mathias; Eikevik, Trygve Magne; Nekså, Petter; Aarlien, Rune. (1999) Heat pumping systems for the next century. 20th International Congress of Refrigeration, IIR/IIF . [Mangler data]; Sydney, Australia, September 1999.

1997

Academic lecture

Bredesen, Arne Mathias; Aflekt, Kåre; Pettersen, Jostein; Hafner, Armin; Nekså, Petter; Skaugen, Geir. (1997) Studies on CO2 heat exchangers and heat transfer. IEA/IIR Workshop on CO2 Technology in Refrigeration, Air Condit ioning and Heat... . [Mangler data]; Trondheim.
Academic lecture

Bredesen, Arne Mathias; Hafner, Armin; Pettersen, Jostein; Nekså, Petter; Aflekt, Kåre. (1997) Heat transfer and pressure drop for in-tube evaporation of CO%c. Heat transfer issues in natural refrigerants . [Mangler data]; University of Maryland, Washington, 6.-7. November 1997.
Academic lecture

Nekså, Petter; Rekstad, Håvard; Fagerli, Bjørn E.. (1997) Norske løsninger med CO%c - praktiske resultater : CO%c-varmepumpe for tappevannsberedning. 15. Nordiske kjølemøte, 8. Nordiske varmepumpedager . [Mangler data]; Reykjavik (1997-06-19/22).
Academic lecture

Pettersen, Jostein; Aarlien, Rune; Nekså, Petter; Skaugen, Geir; Aflekt, Kåre (NTNU). (1997) A comparative evaluation of CO2 and HCFC-22 residential air-conditioning systems in a Japanese climate. 15. nordiske kölemödet, 8. nordiske varmepumpedagene . KTI; Reykjavik. 1997-06-18 - 1997-06-21.

1996

Academic lecture

Aarlien, Rune; Pettersen, Jostein; Skaugen, Geir; Nekså, Petter. (1996) Residential air conditioning with CO2 - Perliminary results. Applications for natural reprigerants . IIR/IIF; Aarhus. 1996-09-03 - 1996-09-06.

1995

Academic lecture

Pettersen, Jostein; Nekså, Petter; Nesje, Odd M.; Schiefloe, Per Arne; Rekstad, Inge Håvard. (1995) Recent advances in CO2 refrigeration. 19th International Congress of Refrigeration . [Mangler data]; [Mangler data].

1994

Academic lecture

Nekså, Petter. (1994) Trans-critical vapour compression heat pumps. New Applications of Natural Working Fluids in Refrigeration and Air Conditioning . [Mangler data]; [Mangler data].

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Petter Nekså

Petter Nekså

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