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Events

The following is a list of events of interest to the MultiPACK project. Some or all of the project's partners will attend, a very good opportunity to meet us.

Ammonia and CO2 Refrigeration Technologies

Ohrid, R. Macedonia, September 16-17^th 2021

The MulltiPACK team participated in this conference!

An article was presented:

Two years of data monitoring of all-CO2 retail stores within the MultiPACK project

Authors:

Paolo Artuso

Silvia Minetto

Antonio Rossetti

Giacomo Tosato

Sergio Marinetti

EUROVENT

EUROPEAN INDUSTRY ASSOCIATION

Online, June 10-11^th 2021

The MultiPACK team presented an article:

Field data of integrated CO2 heat pump systems for Italian hotels in the MultiPACK project

Authors:

Paolo Artuso

Giacomo Tosato

Armin Hafner

Antonio Rosetti

Silvia Minetto

EU Green Week 2021

Virtual Tour to Demo-sites

A virtual tour to demo-sites of MultiPACK: Explaining CO2 technology for integrated heating, ventilation, airconditioning and refrigeration (HVAC&R) installed in high energy-demanding buildings in Southern Europe. As being a green and energy-efficient technology, the applicability and benefits of CO2 refrigeration and heat pumping systems will be addressed along with their contribution to mitigating climate change by eliminating F-gases to be released into the atmosphere.

The event was held on 09.06.2021.

Life-C4R is the international marketing project co-financed by the EU and part of the European LIFE Programme created to promote natural refrigeration and help replacing HCFC and HFC refrigerants with transcritical CO₂.

The conference will be held on 1^st July at 15.00 CET dedicated to illustrating the results of the project! Extensive information will be presented regarding FTE and ETE technologies, as well as data and lessons learnt from the 7 pilot projects installed in Italy, Spain and Romania, with feedbacks from our Clients.

The participation is free of charge and live translation in English, Italian, Spanish and Romanian will be available.

AIRAH Refrigeration Conference 2021

Melbourne, Australia, May 17-18^th 2021

MultiPACK team contributed with an article:

"State-of-the-art CO" refrigeration systems with integrated HVAC functions"

Authors: Sergiy Kolinchuk, Ekaterini Kriezi, Armin Hafner, Vahid Khoshidi, Christian Schemminger

14^th IIR-Gustav Lorentzen Conference on Natural Refrigerants(GL2020)

Kyoto, Japon, December 7-9^th 2020

MultiPACK team contributed with three articles:

Experimental and numerical investigation of a transcritical CO₂ air/water reversible heat pump: analysis of domestic hot water

Author(s) : TOSATO G., ARTUSO P., MINETTO S., ROSSETTI A., ALLOUCHE Y., BANASIAK K.

Development of CO₂ refrigeration technology between 1995 and 2020

Author(s) : HAFNER A.

Field data of CO₂ integrated refrigeration, heating and cooling systems for supermarkets

Author(s) : TOSATO G., MINETTO S., ROSSETTI A., HAFNER A., SCHLEMMINGER C., GIROTTO S.

shecco

Global Natural Refrigerant Virtual Trade show

The world’s first Virtual Trade Show for natural refrigerants

on September 1, 2020

MultiPACK will participate with three presentations!

(Three presentations have been prepared as video format and merged in as a single video. you can reach the presentations via 'on-demand webinars' section of Virtual Trade Show)

MultiPACK: Demonstrating the performance and efficiency of the next generation of standardised integrated cooling and heating packages.

Part-A_Dissemination of results for integrated CO2 systems monitored under MultiPACK Project by Ekaterini Kriezi, Danfoss.

Part-B_Modelling of CHCP for Supermarkets by Michael Jokiel, Christian Schlemminger, Karl Oskar Pires Bjørgen, Sintef Energy Research.

Part-C_CO2 Heat Pump Water Chillers by Armin Hafner and Engin Söylemez, NTNU Department of Energy and Process Engineering

eurammon symposium 2020

Heating and cooling with Natural Refrigerants - a Way to Decarbonization

June 25 - July 8, 2020

The presentationby MultiPACK team (Online, July 6, 2020):

CO2 Heat Pump Water Chillers

Armin Hafner, NTNU; Sergio Girotto, ENEX SRL; Giacomo Tosato, CNR-ITC

Content:

Introduction: CO2 heat pump history

Benefit of CO2 chiller heat pumps

Innovative CO2 chiller development by ENEX

The CO2 Heat Pump Water Chiller within the MultiPACK project

Summary & Conclusion

Compressors 2021

10th International Conference on Compressors and Coolants

When: 13 January 2021

Where: Bratislava, Slovakia

MultiPACK team participated with two presentations!

Paper 1: presented by Vahid Khorshidi, MSc. (Danfoss A/S)

Performance of integrated R744-packs Part 1 - Compressor mass flow estimation based on data driven models using analytical methods and actual field measurement

DOI: 10.18462/iir.compr.2021.0390

Rising concerns for climate change repercautions along with the new legislations aimed at lowering emissions indicates the inevitable transition in cooling/heating industry towards a more energy efficient solutions with minimal environmental impact. Integrated refrigeration, air condition and heat recovery solutions by CO2(R744) packs are efficient solutions to high energy demanding building (supermarkets and hotels). Proven performance enhancement of Multi Ejector SolutionTM makes the R744 systems more energy efficient, especially in warm climates, compared to the most conventional synthetic refrigerant systems in food retail application.Pilot installation in the frame of MultiPack, an EU funded project, provided a wide range of data, offering the possibility of evaluating real performance of each ejector group: high pressure (HP), low pressure (LP) and liquid ejector(LE), by running the system in different operating modes. Analysis on the data indicated performance improvement of a system with ejector, on average a 35% lower energy consumption compared to baseline parallel compression R744 system without ejectors.Availability of mass flow measurement, 6 Coriolis mass flow meters on this pilot, enabled the possibility of comparison of mass flow rate estimation based on data acquisition from compressors with actual measurement. Methods utilized include: Energy balance, volumetric displacement, manufacturer polynomials and data driven method. The comparison reviles the impotence of compressor suction and discharge parameters to for reliable results based on energy balance, volumetric displacement, manufacturer polynomials. The data driven method preforms well after sufficient training time.

Paper 2: presented by Ekaterini Kriezi, PhD (Danfoss A/S)

Performance of integrated R744-packs Part2 - Ejectors performance, a comparison of onsite measurements and model predictions

DOI: 10.18462/iir.compr.2021.0401

Rising concerns for climate change repercautions along with the new legislations aimed at lowering emissions indicates the inevitable transition in cooling/heating industry towards a more energy efficient solutions with minimal environmental impact. Integrated refrigeration, air condition and heat recovery solutions by CO2(R744) packs are efficient solutions to high energy demanding building (supermarkets and hotels). Proven performance enhancement of Multi Ejector SolutionTM makes the R744 systems more energy efficient, especially in warm climates, compared to the most conventional synthetic refrigerant systems in food retail application.Pilot installation in the frame of MultiPack, an EU funded project, provided a wide range of data, offering the possibility of evaluating real performance of each ejector group: high pressure (HP), low pressure (LP) and liquid ejector(LE), by running the system in different operating modes. Analysis on the data indicated performance improvement of a system with ejector, on average a 35% lower energy consumption compared to baseline parallel compression R744 system without ejectors.Availability of mass flow measurement, enabled the possibility of comparison of mass flow rate estimation based on data acquisition from compressors with actual measurement. A data- driven models were used to estimate the performance of ejectors using onsite data from various operating modes and compared with simulated performance and lab measurements. Careful data pre-processing allows the data-driven model to predict the ejector performance with acceptable accuracy compared to mass flows and performance data derived from onside measurements in combination with models validated by highly accurate lab experiments.

ICCC 2020 - 6th IIR Conference on Sustainability and the Cold Chain

When: 15-17 April 2020

Where: Nantes, France

Come and meet us! MultiPACK team will participate with two presentations

Dr. Christian Schlemminger Dr. Yosr Allouche Dr. Silvia Minetto Dr. Giacomo Tosato

( Research scientist, SINTEF) ( Researcher, NTNU) ( Researcher, CNR) (Technologist, CNR)

Paper 1: Integrated energy systems for supermarkets are becoming popular for the shop owners due to significant energy and cost savings. Integrated system means: the centralized refrigeration unit delivers the entire freezing, cooling and Air Conditioning demand of the Supermarket. Only the natural working fluid CO2 is applied within the units.

Within the EU funded project MultiPACK, a series of demonstration supermarkets are developed and monitored across Southern Europe (Portugal and Italy).

The energy performance of the MultiPACK unit in Portugal is compared to comparable shop in the region. The MultiPACK system configuration is explained as well as the baseline configuration, i.e. the reference shop. The first-year operation indicates a 30% reduction in energy demand for the Portuguese shop with the MultiPACK unit when comparing with a shop containing a baseline standard cascade configuration (CO2 & HFC134a).

Paper 2: Pushed by sustainability drivers, commercial refrigeration is now strongly oriented towards CO2 based systems, and, amongst them, integrated solutions are gaining market share, as they offer an environmental friendly, all-in-one solution serving the entire supermarket thermal energy needs.

The EU H2020 Project MultiPACK aims at proving integrated CO2 systems performance in the South European Climate by field measurements.

In this paper, the most recently installed MultiPACK unit is presented: its major peculiar lies in the fact of combining a state of the art CO2 layout, including parallel compression, expansion by ejectors and overfed evaporators, with distributed heating and cooling terminals for localized AC in the shopping area.

Winter and summer operations are presented, taking care of both refrigerating unit and display cabinets performances.

Refrigeration 2020 Conference

When: 23-24 March 2020

Where: Melbourne, Australia

EuroShop World´s No. 1 Retail Trade Fair

When: 16-20 February 2020

Where: Dusseldorf, Germany

You are welcome to join the talk given by Dr. Ekaterini Kriezi from Danfoss and share it with your network!

Dr. Ekaterini Kriezi , Technology expert (Danfoss)

Content: The demonstration sites with CO₂ integrated systems in south European supermarkets are presented. Design Key Performance Index (KPI) for comparison of supermarkets performance and the challenges of monitoring supermarket installation and data handling are discussed.

The presentation is available for download here.

IIR International Congress of Refrigeration

When: 24-30 August 2019

Where: Montreal, Canada

MultiPACK team will participate with two presentations! Come and meet us!

Prof. Armin Hafner Dr. Silvia Minetto Dr. Krzysztof Dr. Christian Dr. Yosr Allouche (NTNU) (CNR) Banasiak Schlemminger (NTNU) (SINTEF) (SINTEF)

Paper 1: The manufacturers of refrigeration equipment are facing challenges related to the legislative requirements forcing them to implement less conventional refrigerants with lower Global Warming Potential (GWP) in their new products. Natural working fluids like Ammonia, Carbon Dioxide and Propane have demonstrated to be energy efficient and environmentally benign alternatives. Ammonia refrigeration systems have been successfully in the market for more than 140 years. Especially at high ambient temperature conditions, these units can outperform conventional HFC systems. The cost, availability and detection of the fluid are no issue on a global base. Hydrocarbon based AC split units, applying propane, are in focus and large-scale production lines are under preparation. The fluid- and thermosphysical properties of CO2 are quite different from most other working fluids. Therefore, the refrigeration system design has to be carefully adapted to the properties of CO2, thereby maximising the energy efficiency and minimising the total cost of ownership. The article describes the challenges related to conventional refrigerants and examples of the latest system developments applying natural working fluids in industrial-, commercial and marine refrigeration will be described in the work.

Paper 2: The complexity of CO2 layouts for commercial refrigeration installed in warm climates, integrating also air conditioning and heating, with different load ratios, poses challenges in evaluating and comparing energy performances. Both analysis based on first or second law of thermodynamics requires the measurement of refrigerant mass flow rate to straight forward evaluate useful effects. A low-cost, reliable and low intrusive option to measure CO2 volume flow will be illustrated, demonstrating the use of not-in-kind sensors in commercial refrigeration systems. Signals coming from the field might be used to evaluate the system performance, i.e. Coefficient of Performance and exergetic efficiency, and potentially to promptly identify anomalous working conditions leading to inefficient operations or failure. Field data will validate the possibility of identifying the system performance and its health status using a limited amount of signals and filtering them through proper figures.

International Conference on Ammonia and CO2 Refrigeration Technologies

When: 11-13 April 2019

Where: Ohrid, Macedonia

sheccoBase webinar: Zero net energy supermarkets: towards a sustainable future

As refrigeration accounts for about 60% of total energy use in supermarkets, the progress towards zero net energy supermarkets can be realised through coupling cooling and heating systems of the store with renewable energy sources and linking the system into a district-heating network. #GoNatRefs

The presentation concerning MultiPACK is available for download.