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  1. Employees

Språkvelger

Norsk

Torbjørn Kristiansen Nielsen

Torbjørn Kristiansen Nielsen

Affiliated
Department of Energy and Process Engineering

torbjorn.nielsen@ntnu.no
+4773593572 +4791897572 Vannkraftlaboratoriet, 2. etg, 24, Gløshaugen, Alfred Getz vei 4
Publications Media

Publications

  • Chronological
  • By category
  • See all publications in Cristin

2022

  • Kelele, Hailay Kiros; Frøyd, Lars; Kahsay, Mulu Bayray; Nielsen, Torbjørn Kristian. (2022) Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy. Energies. volum 15 (21).
    Academic article

2021

  • Cavazzini, Giovanna; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2021) Hydropower. World Scientific Series in Current Energy Issues: Volume 7 Wind, Water and Fire The Other Renewable Energy Resources.
    Academic chapter/article/Conference paper

2020

  • Kelele, Hailay Kiros; Nielsen, Torbjørn Kristian; Froyd, Lars; Kahsay, Mulu Bayray. (2020) Catchment Based Aerodynamic Performance Analysis of Small Wind Turbine Using a Single Blade Concept for a Low Cost of Energy. Energies. volum 13 (21).
    Academic article

2019

  • Dhital, Tilak Chand; Nielsen, Torbjørn Kristian. (2019) Flow and efficiency measurements with clamp-on ultrasonic equipment. Journal of Physics: Conference Series (JPCS). volum 1266.
    Academic article
  • Mdee, Ombeni John; Kimambo, Cuthbert Z.M.; Nielsen, Torbjørn Kristian; Kihedu, Joseph. (2019) Analytical Evaluation of Head and Flow Rate Off-Design Characteristics for Pump as Turbine Application. Journal of Fluids Engineering - Trancactions of The ASME. volum 141 (5).
    Academic article
  • Nielsen, Torbjørn Kristian; Svingen, Bjørnar; Vilberg, Ingrid Kristine. (2019) The elastic property of water and penstock's effect on the governor stability. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (5).
    Academic article
  • Perkunder, Magnus Farstad; Nielsen, Torbjørn Kristian; Faudot, Celine. (2019) Investigation of fluid transients in a penstock attached to a Francis turbine rig using seismic interferometry. Journal of Physics: Conference Series (JPCS). volum 1266 (1).
    Academic article
  • Svarstad, Magni Fjørtoft; Nielsen, Torbjørn Kristian. (2019) Pressure pulsations during a fast transition from pump to turbine mode of operation in laboratory and field experiment. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (8).
    Academic article
  • Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2019) Transient hydraulic calculations with a linear turbine model derived from a nonlinear synthetic model. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (5).
    Academic article
  • Trivedi, Chirag; Dahlhaug, Ole Gunnar; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2019) Francis-99 Workshop 3: Fluid structure interaction. Journal of Physics: Conference Series (JPCS). volum 1296 (1).
    Academic article
  • Vilberg, Ingrid Kristine; Kjeldsen, Morten; Escaler, Xavier; Ekanger, Jarle Vikør; Nielsen, Torbjørn Kristian. (2019) Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access. IOP Conference Series: Earth and Environmental Science (EES). volum 240.
    Academic article

2018

  • Li, Deyou; Wang, Hongjie; Li, Zhenggui; Nielsen, Torbjørn Kristian; Goyal, Rahul; Wei, Xianzhu; Qin, Daqing. (2018) Transient characteristics during the closure of guide vanes in a pump-turbine in pump mode. Renewable Energy. volum 118.
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2018) Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. IFAC-PapersOnLine. volum 51 (2).
    Academic article
  • Svarstad, Magni Fjørtoft; Nielsen, Torbjørn Kristian. (2018) Fast transition from pump to turbine mode of operation. International Journal of Fluid Machinery and Systems. volum 11 (3).
    Academic article

2017

  • Cervantes, Michel; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2017) Francis-99 Workshop 2: transient operation of Francis turbines. Journal of Physics: Conference Series (JPCS). volum 782 (1).
    Editorial
  • Gong, Ruzhi; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2017) Blade passage modeling strategy for hydraulic turbine. International Journal of Fluid Machinery and Systems. volum 10 (4).
    Academic article
  • Li, Deyou; Wang, Hongjie; Nielsen, Torbjørn Kristian; Gong, Ruzhi; Wei, Xianzhu; Qin, Daqing. (2017) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. International Journal of Fluid Machinery and Systems. volum 10 (2).
    Academic article
  • Vereide, Kaspar; Svingen, Bjørnar; Nielsen, Torbjørn Kristian; Lia, Leif. (2017) The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants. IEEE transactions on energy conversion. volum 32 (1).
    Academic article

2016

  • Li, Deyou; Wang, Hongjie; Chen, Jinxia; Nielsen, Torbjørn Kristian; Qin, Daqing; Wei, Xianzhu. (2016) Hysteresis characteristic in the hump region of a pump-turbine model. Energies. volum 9 (8).
    Academic article
  • Li, Deyou; Wang, Hongjie; Nielsen, Torbjørn Kristian; Gong, Ruzhi; Wei, Xianzhu; Qin, Daqing. (2016) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. IOP Conference Series: Earth and Environmental Science (EES). volum 49 (4).
    Academic article
  • Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2016) Experimental methods and design of a Pelton bucket. 2016. ISBN 978-82-326-0860-7. Doktoravhandlinger ved NTNU (2016:01).
    Doctoral dissertation
  • Thapa, Biraj Singh; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian; Thapa, Bhola. (2016) Effects of sediment erosion in guide vanes of Francis turbines. 2016. ISBN 978-82-326-1859-0.
    Doctoral dissertation
  • Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2016) Hydraulics and Thermodynamics of Closed Surge Tanks for Hydropower Plants. 2016. ISBN 978-82-326-1386-1. Doktoravhandlinger ved NTNU (20).
    Doctoral dissertation
  • Walseth, Eve Cathrin; Nielsen, Torbjørn Kristian; Svingen, Bjørnar. (2016) Measuring the dynamic characteristics of a low specific speed pump-Turbine model. Energies. volum 9 (3).
    Academic article
  • Wiborg, Erik Jacques; Nielsen, Torbjørn Kristian. (2016) Continuous Efficiency Measurements on Hydro Power Plants. 2016. ISBN 978-82-326-1998-6. Doktoravhandlinger ved NTNU (2016:330).
    Doctoral dissertation

2015

  • Cervantes, Michel; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2015) Francis-99 Workshop 1: steady operation of Francis turbines. Journal of Physics: Conference Series (JPCS). volum 579.
    Editorial
  • Escaler, Xavier; Ekanger, Jarle Vikør; Francke, Håkon Hjort; Kjeldsen, Morten; Nielsen, Torbjørn Kristian. (2015) Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full-Scale Francis Turbine. Journal of Fluids Engineering - Trancactions of The ASME. volum 137 (1).
    Academic article
  • Nielsen, Torbjørn Kristian. (2015) Simulation model for Francis and Reversible Pump Turbines. International Journal of Fluid Machinery and Systems. volum 8 (3).
    Academic article
  • Nocente, Alessandro; Arslan, Tufan; Nielsen, Torbjørn Kristian. (2015) Numerical Prediction of a Multistage Centrifugal Pump Performance With Stationary and Moving Mesh. ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum.
    Academic chapter/article/Conference paper
  • Nocente, Alessandro; Arslan, Tufan; Nielsen, Torbjørn Kristian. (2015) Numerical Simulation of Flow inside Centrifugal Pump by two different Solvers. Proceedings of MekIT'15 Eighth National Conference on Computational Mechanics.
    Academic chapter/article/Conference paper
  • Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2015) Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks. Journal of Hydraulic Research. volum 53 (4).
    Academic article
  • Vereide, Kaspar; Tekle, Torbjørn; Nielsen, Torbjørn Kristian. (2015) Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants. Journal of Hydraulic Engineering. volum 141 (6).
    Academic article

2014

  • Kaunda, Chiyembekezo Suzgo; Kimambo Z, Cuthbert; Nielsen, Torbjørn Kristian. (2014) A numerical investigation of flow profile and performance of a low cost Crossflow turbine. The International Journal of Energy and Environment. volum 5 (3).
    Academic article
  • Kaunda, Chiyembekezo Suzgo; Kimambo, C.Z.; Nielsen, Torbjørn Kristian. (2014) A technical discussion on microhydropower technology and its turbines. Renewable and Sustainable Energy Reviews. volum 35.
    Academic article
  • Nielsen, Torbjørn Kristian; Storli, Pål-Tore Selbo. (2014) Measurements and simulations of turbines on common grid. IOP Conference Series: Earth and Environmental Science (EES). volum 22 (4).
    Academic article
  • Nielsen, Torbjørn Kristian; Svarstad, Magni Fjørtoft. (2014) Unstable behaviour of RPT when testing turbine characteristics in the laboratory. IOP Conference Series: Earth and Environmental Science (EES). volum 22.
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2014) Dynamic load on a Francis turbine runner from simulations based on measurements. IOP Conference Series: Earth and Environmental Science (EES). volum 22 (3).
    Academic article

2013

  • Harby, Atle; Sauterleute, Julian; Korpås, Magnus; Killingtveit, Ånund; Solvang, Eivind; Nielsen, Torbjørn Kristian. (2013) Pumped Storage Hydropower. Transition to Renewable Energy Systems.
    Academic chapter/article/Conference paper
  • Nielsen, Torbjørn Kristian. (2013) Hydropower and pumped storage. Handbook of Energy.
    Academic chapter/article/Conference paper
  • Zhao, Wei; Billdal, Jan Tore; Nielsen, Torbjørn Kristian; Brekke, Håvard. (2013) Study on the leakage flow through a clearance gap between two stationary walls. IOP Conference Series: Earth and Environmental Science (EES). volum 15.
    Academic article

2012

  • Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Dependency on Runner Geometry for Reversible-Pump Turbine Characteristics in Turbine Mode of Operation. Journal of Fluids Engineering - Trancactions of The ASME. volum 134 (12).
    Academic article
  • Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Stability Limits of Reversible-Pump Turbines in Turbine Mode of Operation and Measurements of Unstable Characteristics. Journal of Fluids Engineering - Trancactions of The ASME. volum 134 (11).
    Academic article

2011

  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. I: Investigation of Zielke's Model. Journal of Hydraulic Engineering. volum 137 (5).
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. II: Two-Coefficient Instantaneous Acceleration-Based Model. Journal of Hydraulic Engineering. volum 137 (6).
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. III: Investigation of the EIT Model Based on Position-Dependent Coefficient Approach in MIAB Model. Journal of Hydraulic Engineering. volum 137 (9).
    Academic article

2010

  • Doorman, Gerard L.; Killingtveit, Ånund; Nielsen, Torbjørn Kristian. (2010) Norsk vannkraft og klimatrusselen. Adresseavisen.
    Feature article
  • Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Jonsson, Pontus P.. (2010) Influence from bends on a pressure-time measurement. IOP Conference Series: Earth and Environmental Science (EES). volum 12 (1).
    Academic article

2007

  • Antonsen, Øyvind; Nielsen, Torbjørn Kristian. (2007) Unsteady flow in wicket gate and runner with focus on static and dynamic load on runner. 2007. ISBN 978-82-471-3392-7.
    Doctoral dissertation

2002

  • Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2002) Status for mini- og mikrokraftverk i Norge. 2002.
    Report
  • Nielsen, Torbjørn Kristian. (2002) Status for mini- og mikrovannkraftverk i Norge. 2002.
    Report

1990

  • Nielsen, Torbjørn Kristian. (1990) Transient Characteristics of High Head Francis Turbines. 1990. ISBN 82-7119-242-6.
    Doctoral dissertation

Journal publications

  • Kelele, Hailay Kiros; Frøyd, Lars; Kahsay, Mulu Bayray; Nielsen, Torbjørn Kristian. (2022) Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy. Energies. volum 15 (21).
    Academic article
  • Kelele, Hailay Kiros; Nielsen, Torbjørn Kristian; Froyd, Lars; Kahsay, Mulu Bayray. (2020) Catchment Based Aerodynamic Performance Analysis of Small Wind Turbine Using a Single Blade Concept for a Low Cost of Energy. Energies. volum 13 (21).
    Academic article
  • Dhital, Tilak Chand; Nielsen, Torbjørn Kristian. (2019) Flow and efficiency measurements with clamp-on ultrasonic equipment. Journal of Physics: Conference Series (JPCS). volum 1266.
    Academic article
  • Mdee, Ombeni John; Kimambo, Cuthbert Z.M.; Nielsen, Torbjørn Kristian; Kihedu, Joseph. (2019) Analytical Evaluation of Head and Flow Rate Off-Design Characteristics for Pump as Turbine Application. Journal of Fluids Engineering - Trancactions of The ASME. volum 141 (5).
    Academic article
  • Nielsen, Torbjørn Kristian; Svingen, Bjørnar; Vilberg, Ingrid Kristine. (2019) The elastic property of water and penstock's effect on the governor stability. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (5).
    Academic article
  • Perkunder, Magnus Farstad; Nielsen, Torbjørn Kristian; Faudot, Celine. (2019) Investigation of fluid transients in a penstock attached to a Francis turbine rig using seismic interferometry. Journal of Physics: Conference Series (JPCS). volum 1266 (1).
    Academic article
  • Svarstad, Magni Fjørtoft; Nielsen, Torbjørn Kristian. (2019) Pressure pulsations during a fast transition from pump to turbine mode of operation in laboratory and field experiment. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (8).
    Academic article
  • Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2019) Transient hydraulic calculations with a linear turbine model derived from a nonlinear synthetic model. IOP Conference Series: Earth and Environmental Science (EES). volum 240 (5).
    Academic article
  • Trivedi, Chirag; Dahlhaug, Ole Gunnar; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2019) Francis-99 Workshop 3: Fluid structure interaction. Journal of Physics: Conference Series (JPCS). volum 1296 (1).
    Academic article
  • Vilberg, Ingrid Kristine; Kjeldsen, Morten; Escaler, Xavier; Ekanger, Jarle Vikør; Nielsen, Torbjørn Kristian. (2019) Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access. IOP Conference Series: Earth and Environmental Science (EES). volum 240.
    Academic article
  • Li, Deyou; Wang, Hongjie; Li, Zhenggui; Nielsen, Torbjørn Kristian; Goyal, Rahul; Wei, Xianzhu; Qin, Daqing. (2018) Transient characteristics during the closure of guide vanes in a pump-turbine in pump mode. Renewable Energy. volum 118.
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2018) Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. IFAC-PapersOnLine. volum 51 (2).
    Academic article
  • Svarstad, Magni Fjørtoft; Nielsen, Torbjørn Kristian. (2018) Fast transition from pump to turbine mode of operation. International Journal of Fluid Machinery and Systems. volum 11 (3).
    Academic article
  • Cervantes, Michel; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2017) Francis-99 Workshop 2: transient operation of Francis turbines. Journal of Physics: Conference Series (JPCS). volum 782 (1).
    Editorial
  • Gong, Ruzhi; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2017) Blade passage modeling strategy for hydraulic turbine. International Journal of Fluid Machinery and Systems. volum 10 (4).
    Academic article
  • Li, Deyou; Wang, Hongjie; Nielsen, Torbjørn Kristian; Gong, Ruzhi; Wei, Xianzhu; Qin, Daqing. (2017) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. International Journal of Fluid Machinery and Systems. volum 10 (2).
    Academic article
  • Vereide, Kaspar; Svingen, Bjørnar; Nielsen, Torbjørn Kristian; Lia, Leif. (2017) The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants. IEEE transactions on energy conversion. volum 32 (1).
    Academic article
  • Li, Deyou; Wang, Hongjie; Chen, Jinxia; Nielsen, Torbjørn Kristian; Qin, Daqing; Wei, Xianzhu. (2016) Hysteresis characteristic in the hump region of a pump-turbine model. Energies. volum 9 (8).
    Academic article
  • Li, Deyou; Wang, Hongjie; Nielsen, Torbjørn Kristian; Gong, Ruzhi; Wei, Xianzhu; Qin, Daqing. (2016) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. IOP Conference Series: Earth and Environmental Science (EES). volum 49 (4).
    Academic article
  • Walseth, Eve Cathrin; Nielsen, Torbjørn Kristian; Svingen, Bjørnar. (2016) Measuring the dynamic characteristics of a low specific speed pump-Turbine model. Energies. volum 9 (3).
    Academic article
  • Cervantes, Michel; Trivedi, Chirag; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2015) Francis-99 Workshop 1: steady operation of Francis turbines. Journal of Physics: Conference Series (JPCS). volum 579.
    Editorial
  • Escaler, Xavier; Ekanger, Jarle Vikør; Francke, Håkon Hjort; Kjeldsen, Morten; Nielsen, Torbjørn Kristian. (2015) Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full-Scale Francis Turbine. Journal of Fluids Engineering - Trancactions of The ASME. volum 137 (1).
    Academic article
  • Nielsen, Torbjørn Kristian. (2015) Simulation model for Francis and Reversible Pump Turbines. International Journal of Fluid Machinery and Systems. volum 8 (3).
    Academic article
  • Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2015) Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks. Journal of Hydraulic Research. volum 53 (4).
    Academic article
  • Vereide, Kaspar; Tekle, Torbjørn; Nielsen, Torbjørn Kristian. (2015) Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants. Journal of Hydraulic Engineering. volum 141 (6).
    Academic article
  • Kaunda, Chiyembekezo Suzgo; Kimambo Z, Cuthbert; Nielsen, Torbjørn Kristian. (2014) A numerical investigation of flow profile and performance of a low cost Crossflow turbine. The International Journal of Energy and Environment. volum 5 (3).
    Academic article
  • Kaunda, Chiyembekezo Suzgo; Kimambo, C.Z.; Nielsen, Torbjørn Kristian. (2014) A technical discussion on microhydropower technology and its turbines. Renewable and Sustainable Energy Reviews. volum 35.
    Academic article
  • Nielsen, Torbjørn Kristian; Storli, Pål-Tore Selbo. (2014) Measurements and simulations of turbines on common grid. IOP Conference Series: Earth and Environmental Science (EES). volum 22 (4).
    Academic article
  • Nielsen, Torbjørn Kristian; Svarstad, Magni Fjørtoft. (2014) Unstable behaviour of RPT when testing turbine characteristics in the laboratory. IOP Conference Series: Earth and Environmental Science (EES). volum 22.
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2014) Dynamic load on a Francis turbine runner from simulations based on measurements. IOP Conference Series: Earth and Environmental Science (EES). volum 22 (3).
    Academic article
  • Zhao, Wei; Billdal, Jan Tore; Nielsen, Torbjørn Kristian; Brekke, Håvard. (2013) Study on the leakage flow through a clearance gap between two stationary walls. IOP Conference Series: Earth and Environmental Science (EES). volum 15.
    Academic article
  • Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Dependency on Runner Geometry for Reversible-Pump Turbine Characteristics in Turbine Mode of Operation. Journal of Fluids Engineering - Trancactions of The ASME. volum 134 (12).
    Academic article
  • Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Stability Limits of Reversible-Pump Turbines in Turbine Mode of Operation and Measurements of Unstable Characteristics. Journal of Fluids Engineering - Trancactions of The ASME. volum 134 (11).
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. I: Investigation of Zielke's Model. Journal of Hydraulic Engineering. volum 137 (5).
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. II: Two-Coefficient Instantaneous Acceleration-Based Model. Journal of Hydraulic Engineering. volum 137 (6).
    Academic article
  • Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) Transient Friction in Pressurized Pipes. III: Investigation of the EIT Model Based on Position-Dependent Coefficient Approach in MIAB Model. Journal of Hydraulic Engineering. volum 137 (9).
    Academic article
  • Doorman, Gerard L.; Killingtveit, Ånund; Nielsen, Torbjørn Kristian. (2010) Norsk vannkraft og klimatrusselen. Adresseavisen.
    Feature article
  • Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Jonsson, Pontus P.. (2010) Influence from bends on a pressure-time measurement. IOP Conference Series: Earth and Environmental Science (EES). volum 12 (1).
    Academic article

Part of book/report

  • Cavazzini, Giovanna; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2021) Hydropower. World Scientific Series in Current Energy Issues: Volume 7 Wind, Water and Fire The Other Renewable Energy Resources.
    Academic chapter/article/Conference paper
  • Nocente, Alessandro; Arslan, Tufan; Nielsen, Torbjørn Kristian. (2015) Numerical Prediction of a Multistage Centrifugal Pump Performance With Stationary and Moving Mesh. ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum.
    Academic chapter/article/Conference paper
  • Nocente, Alessandro; Arslan, Tufan; Nielsen, Torbjørn Kristian. (2015) Numerical Simulation of Flow inside Centrifugal Pump by two different Solvers. Proceedings of MekIT'15 Eighth National Conference on Computational Mechanics.
    Academic chapter/article/Conference paper
  • Harby, Atle; Sauterleute, Julian; Korpås, Magnus; Killingtveit, Ånund; Solvang, Eivind; Nielsen, Torbjørn Kristian. (2013) Pumped Storage Hydropower. Transition to Renewable Energy Systems.
    Academic chapter/article/Conference paper
  • Nielsen, Torbjørn Kristian. (2013) Hydropower and pumped storage. Handbook of Energy.
    Academic chapter/article/Conference paper

Report

  • Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2016) Experimental methods and design of a Pelton bucket. 2016. ISBN 978-82-326-0860-7. Doktoravhandlinger ved NTNU (2016:01).
    Doctoral dissertation
  • Thapa, Biraj Singh; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian; Thapa, Bhola. (2016) Effects of sediment erosion in guide vanes of Francis turbines. 2016. ISBN 978-82-326-1859-0.
    Doctoral dissertation
  • Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2016) Hydraulics and Thermodynamics of Closed Surge Tanks for Hydropower Plants. 2016. ISBN 978-82-326-1386-1. Doktoravhandlinger ved NTNU (20).
    Doctoral dissertation
  • Wiborg, Erik Jacques; Nielsen, Torbjørn Kristian. (2016) Continuous Efficiency Measurements on Hydro Power Plants. 2016. ISBN 978-82-326-1998-6. Doktoravhandlinger ved NTNU (2016:330).
    Doctoral dissertation
  • Antonsen, Øyvind; Nielsen, Torbjørn Kristian. (2007) Unsteady flow in wicket gate and runner with focus on static and dynamic load on runner. 2007. ISBN 978-82-471-3392-7.
    Doctoral dissertation
  • Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2002) Status for mini- og mikrokraftverk i Norge. 2002.
    Report
  • Nielsen, Torbjørn Kristian. (2002) Status for mini- og mikrovannkraftverk i Norge. 2002.
    Report
  • Nielsen, Torbjørn Kristian. (1990) Transient Characteristics of High Head Francis Turbines. 1990. ISBN 82-7119-242-6.
    Doctoral dissertation

Media

2018

  • Academic lecture
    Nielsen, Torbjørn Kristian; Svingen, Bjørnar; Vilberg, Ingrid Kristine. (2018) The elastic property of water and penstock’s effect on the governor stability. 29th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
  • Popular scientific lecture
    Nydal, Ole Jørgen; Nielsen, Torbjørn Kristian. (2018) African University Collaboration on Renewable Energy. Innspill seminar NTNU . NTNU; Trondheim. 2018-01-11 - 2018-01-11.
  • Academic lecture
    Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) First principles approach linear model for hydraulic turbines suitable for use in available simulation platforms. Pressure Surges 2018 . BHR Group; Bordeaux. 2018-11-14 - 2018-11-16.
  • Academic lecture
    Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) Transient Hydraulic Calculations with a Linear Turbine Model derived from a Nonlinear Synthetic Model. 29th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
  • Academic lecture
    Vilberg, Ingrid Kristine; Kjeldsen, Morten; Arndt, Roger E. A.; Nielsen, Torbjørn Kristian. (2018) The effect of gas content on cavitation shedding and test facility dynamics. 10th International Symposium on Cavitation (CAV2018) ; 2018-05-14 - 2018-05-16.
  • Academic lecture
    Vilberg, Ingrid Kristine; Kjeldsen, Morten; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2018) Experimental assessment of pressure pulsations and transient characteristics of a 1400 m pipe line. Pressure Surges 2018 . BHR Group; Bordeaux. 2018-11-14 - 2018-11-16.

2016

  • Lecture
    Nocente, Alessandro; Arslan, Tufan; Jasinski, Daniel; Nielsen, Torbjørn Kristian. (2016) A Study of Flow inside a Centrifugal Pump: High Performance Numerical Simulations Using GPU cards. ISROMAC16 - International Symposium on Transport Phenomena and Dynamics of Rotating Machinery ; Honolulu, HI. 2016-04-10 - 2016-04-15.

2014

  • Interview
    Snøfugl, Ingvil; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Lia, Leif. (2014) Nytt vannkraftsenter skal lokke ungdom vekk fra oljebransjen. Teknisk Ukeblad nettavis [Internett]. 2014-02-10.
  • Interview
    Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian; Lundgren, Silje Strand. (2014) Vannkraft: Europas grønne batteri. Under Dusken [Tidsskrift]. 2014-03-11.
  • Academic lecture
    Vereide, Kaspar; Lia, Leif; Nielsen, Torbjørn Kristian. (2014) Physical Modelling of Hydropower Waterway with Air Cushion Surge Chamber (ISBN 9781742721156). 5th International Symposium on Hydraulic Structures . IAHR; Brisbane. 2014-06-25 - 2014-06-25.
  • Lecture
    Wiborg, Erik Jacques; Hulaas, Harald; Francke, Håkon Hjort; Nielsen, Torbjørn Kristian. (2014) Applied statistical quality control on field measurement data. IGHEM 2014 . International Gruop of Hydro Efficiency Measurements; Itajuba. 2014-09-06 - 2014-09-19.

2013

  • Academic lecture
    Harby, Atle; Sauterleute, Julian; Korpås, Magnus; Killingtveit, Ånund; Solvang, Eivind; Nielsen, Torbjørn Kristian. (2013) Pumped Storage Hydropower. 3rd International Conference on Energy Process Engineering . DECHEMA; Frankfurt am Main. 2013-06-04 - 2013-06-06.

2012

  • Academic lecture
    Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) A Two-Dimensional Model for Pump-Turbine Instability Investigations. ISROMAC ; 2012-02-27 - 2012-03-03.
  • Academic lecture
    Olimstad, Grunde; Nielsen, Torbjørn Kristian; Børresen, Bjarne. (2012) Geomatry Impact on Pump-Turbine Characteristics. ISROMAC ; Honolulu. 2012-02-27 - 2012-03-03.
  • Academic lecture
    Walseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2012) Comprehensive experimental study of instability in a reversible pump-turbine model at no-load operation. Hydro 2012 ; 2012-10-29 - 2012-10-31.
  • Academic lecture
    Walseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2012) Investigation of a 1D-model for simulating the characteristics of a high head Francis turbine. 14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery. ISROMAC-14 . Technische Universität Darmstadt; Honolulu, Hawaii. 2012-02-27 - 2012-03-02.

2011

  • Academic lecture
    Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2011) The quality of Norwegian grid frequency and the consequences for pumped storage. Pumped Storage Powerplants . SHF; Lyon. 2011-11-23 - 2011-11-24.
  • Academic lecture
    Walseth, Eve Cathrin; Svingen, Bjørnar; Nielsen, Torbjørn Kristian. (2011) Investigating the effect of turbine characteristics on the pressure response of a system. IAHR 4th international conference on cavitation and dynamic problems in hydraulic machinery and systems . IAHR; Beograd. 2011-10-26 - 2011-10-28.

2010

  • Academic lecture
    Jonsson, Pontus P.; Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) The Pressure-Time measurements project at LTU and NTNU. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
  • Academic lecture
    Kobro, Einar; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) Data Analysis From Onboard Francis Model Runner Pressure Measurements. The 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery . University of Tokyo, Japan; Honolulu, Hawaii. 2010-04-04 - 2010-04-09.
  • Academic lecture
    Nielsen, Torbjørn Kristian; Olimstad, Grunde. (2010) Dynamic Behaviour of Reversible Pump-Turbines in Turbine Mode of Operation. ISROMAC ; 2010-04-04 - 2010-04-07.
  • Academic lecture
    Ramdal, Jørgen; Jonsson, Pontus P.; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) Uncertainties for Pressure-Time Efficiency Measurements. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology; Roorkee. 2010-10-21 - 2010-10-23.
  • Academic lecture
    Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) UNCERTAINTY AND PERFORMANCE OF A LOW HEAD THERMODYNAMIC MEASUREMENT. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
  • Academic lecture
    Walseth, Eve Cathrin; Nielsen, Torbjørn Kristian. (2010) Reversible Pumped Hydro-Benefits and Challenges. Renewable Energy Research Conference . The Centre for Renewable Energy; Trondheim. 2010-06-07 - 2010-06-08.
  • Academic lecture
    Zhao, Wei; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2010) An Experimental Study on Leakage Flow in Different Geometrical Disk Seals. 9th International Conference on Hydrodynamics ; Shanghai. 2010-10-11 - 2010-10-15.
  • Academic lecture
    Zhao, Wei; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2010) Effects of Cavity on Leakage Loss in Straight-though Labyrinth Seals. 25th IAHR Symposium on Hydraulic Machinery and Systems ; Timisoara. 2010-09-20 - 2010-09-24.

2009

  • Academic lecture
    Kobro, Einar; Gamboa, Alphonse; Bloch, Reinhard; Nielsen, Torbjørn Kristian. (2009) ONBOARD PRESSURE MEASUREMENT IN HIGH HEAD FRANCIS PROTOTYPE RUNNERS. 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, . IAHR; Brno. 2009-10-14 - 2009-10-16.
  • Popular scientific lecture
    Nielsen, Torbjørn Kristian. (2009) Hva betur turbinvirkningsgraden på inntekten. Småkraftverk konferanse . Energi Norge; Gardermoen. 2009-03-09.
  • Popular scientific lecture
    Nielsen, Torbjørn Kristian. (2009) Hydro Power. ISFIT 09 . ISFIT/NTNU; Trondheim. 2009-09-08 - 2009-09-09.
  • Academic lecture
    Nielsen, Torbjørn Kristian. (2009) System Dynamics in Hydro Power. 3rd Nordic Conference in Fluid Dynamics . Vattenfall; Köbenhavn. 2009-09-15 - 2009-09-16.
  • Popular scientific lecture
    Nielsen, Torbjørn Kristian. (2009) Vannkraft i verden. Maskinmøte 09 . Energi Norge; Trondheim. 2009-12-10.
  • Academic lecture
    Ramdal, Jørgen; Jonsson, Pontus P.; Nielsen, Torbjørn Kristian; Cervantes, Michel. (2009) Finding Inertia Constants for Bends related to a Modified Gibson Method. 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hyrdraulic Machinery and System . IAHR; Brno. 2009-10-14 - 2009-10-16.
  • Poster
    Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Jonsson, Pontus P.; Cervantes, Michel. (2009) FINDING INERTIA TIME CONSTANTS FOR BENDS RELATED TO A MODIFIED GIBSON’S METHOD. 3rd IAHR Int. meeting of the workgroup on cavitation and dynamic problems in Hydarulic machinery . IAHR; Brno. 2009-10-14 - 2009-10-16.
  • Academic lecture
    Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2009) Curved friction coefficients for better fit with experimental results. International Meeting on “Unsteady friction in pipes, ducts and channels” . Deltares; Delft. 2009-05-06 - 2009-05-07.
  • Academic lecture
    Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2009) Improving the performance of instantaneous acceleration based models using curved coefficients. 3rd Internartional Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems . IAHR; Brno. 2009-10-14 - 2009-10-16.

2008

  • Academic lecture
    Kobro, Einar; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2008) Onboard Pressure Measurement In Francis Model Runner Blades. 24th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Foz do Iguazzu. 2008-10-27 - 2008-10-31.
  • Academic lecture
    Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2008) Decreasing uncertainty in thermodynamic measurement. IAHR Symposium on Hydraulic Machinery and systems . IAHR; Foz do Iguassu, Brazil. 2008-10-27 - 2008-10-31.
  • Academic lecture
    Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian. (2008) NON- STATIONARY, FREQUENCY DEPENDENT FRICTION IN HYDRAULIC PIPE SYSTEMS; AN INVESTIGATION OF THE ZIELKE MODEL. 24th IAHR Symposium on Hydraulic Machinery and Systems ; 2008-10-27 - 2008-10-31.

2006

  • Academic lecture
    Antonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Experimental and Theoretical Investigations of the Flow Field at the Inlet of a Francis Runner. HydroVision 2006 . HCI-Publication; Portland, Oregon. 2006-08-01 - 2006-08-04.
  • Academic lecture
    Antonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Billdal, Jan Tore. (2006) Pressure pulses in Francis Turbines vs. guide vane design. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
  • Academic lecture
    Dahlhaug, Ole Gunnar; Kobro, Einar; Skåre, Per Egil; Nielsen, Torbjørn Kristian; Thapa, Bhola. (2006) Efficiency loss in Pelton buckets due to sediment erosion. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
  • Academic lecture
    Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian; Brandåstrø, Bård Aslak; Francke, Håkon Hjort; Hulaas, Harald. (2006) Comparison between pressure-time and thermodynamic efficiency measurements on a low head turbine. IGHEM 2006 . The International Group for Hydraulic Efficiency Measurement; Portland, Oregon. 2006-07-30 - 2006-08-01.
  • Academic lecture
    Kjeldsen, Morten; Olsen, Knut Magne; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Water injection for the mitigation of draft tube pressure pulsations. IAHR Int. Meeting on Cavitation and Dynamic Problems . IAHR; Barcelona. 2006-06-28 - 2006-06-30.
  • Academic lecture
    Nielsen, Torbjørn Kristian; Røyrvik, Johnny; Ramdal, Jørgen; Dahlhaug, Ole Gunnar. (2006) Propeller turbine with two contra-rotating impellers and built in generators. 23th IAHR Symposium . IAHR; Yokohama. 2006-10-17 - 2006-10-20.
  • Academic lecture
    Svingen, Bjørnar; Brekke, Terje; Skaare, Per Egil; Nielsen, Torbjørn Kristian. (2006) Minimizing oscillations and transients for large and rapid changes in power output from hydro power plants by new control algorithms. 23th IAHR Symposium . IAHR; Yokohama. 2006-10-17 - 2006-10-20.
  • Academic lecture
    Svingen, Bjørnar; Nielsen, Torbjørn Kristian; Skaare, Per Egil. (2006) On transient problems in Norwegian Power Plants, and solution by transient analysis and interactive simulators using LVTrans. IAHR International meeting of WG on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems . IAHR; Barcelona. 2006-06-20 - 2006-06-30.

2005

  • Academic lecture
    Dahlhaug, Ole Gunnar; Thapa, Bhola; Nielsen, Torbjørn Kristian; Ruud, Jonas Jessen. (2005) Thermodynamic efficiency measurement of Khimti Hydropower Plant and assessment of sand erosion on turbine components. Hydropwer �05, The Backbone of Sustainable Energy Supply. . International Center for Hydropower, ICH; Stavanger. 2005-05-23 - 2005-05-25.
  • Interview
    Nielsen, Torbjørn Kristian. (2005) Bygger kraftverk under vann. Teknisk ukeblad [Avis]. 2005-07-23.
  • Interview
    Nielsen, Torbjørn Kristian. (2005) Distriktsnyheter Sogn og fjordane vedr. bølgekraft. NRK Sogn og fjordane [Radio]. 2005-06-25.
  • Popular scientific lecture
    Nielsen, Torbjørn Kristian. (2005) Fornybar energi i startgropa-salt, bølger, havstrøm og sol. Norges energidager 2005 . Norges vassdrags- og energidirektorat; Oslo. 2005-10-20 - 2005-10-21.
  • Interview
    Nielsen, Torbjørn Kristian. (2005) Opp av bølgedalen. Ukeavisen Ledelse, Nyskaping [Avis]. 2005-12-01.
  • Interview
    Nielsen, Torbjørn Kristian. (2005) Ubegripelig kraftsatsing. Teknisk ukeblad [Avis]. 2005-07-23.
  • Interview
    Nielsen, Torbjørn Kristian. (2005) Vil ta kraft fra bølgene. Dagens Næringsliv [Avis]. 2005-06-24.

2004

  • Interview
    0lsen, Claude R.; Falnes, Johannes; Nielsen, Torbjørn Kristian; Rostrup, Jørgen. (2004) Nytt liv for bølgekraften. EuroPower, juni 2004, 2(6) , vedlegg til Dagens Næringsliv [Avis]. 2004-06-25.
  • Academic lecture
    Antonsen, Øyvind; Nielsen, Torbjørn Kristian. (2004) CFD simulation of von Karman vortex shedding. IAHR Symposium . IAHR, VAttenfall; Stockholm. 2004-06-29 - 2004-07-02.
  • Academic lecture
    Nielsen, Torbjørn Kristian. (2004) Frequency and load regulatig ability of water power plants exposed to Load ramping. IAHR Symposium . IAHR, Vattenfall; Stockholm. 2004-06-29 - 2004-07-02.
  • Academic lecture
    Pettersen, Kristin; Nielsen, Torbjørn Kristian; Billdal, Jan Tore. (2004) An explanation to steep speed-flow characteristics of RPTs. IAHR Symposium . IAHR, Vattenfall; Stockholm. 2004-06-29 - 2004-07-02.

2003

  • Academic lecture
    Nielsen, Torbjørn Kristian. (2003) Om turbiner og anlegg for små vannkraftverk. Norsk Elektroteknisk forening; Dagseminar småkraftverk . [Mangler data]; Oslo. 2003-10-30.
  • Programme participation
    Nielsen, Torbjørn Kristian. (2003) Schrødingers katt: uttalelse om nytt elvekraft konsept. NRK, Schrødingers katt [TV]. 2003-11-27.
  • Academic lecture
    Nielsen, Torbjørn Kristian; Antonsen, Øyvind. (2003) CFD simulation of von Karman vortex shedding. IAHR Work Group . [Mangler data]; Stuttgart, Germany. 2003-10-10.
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