Blar i SINTEF Open på forfatter "Hafner, Armin"
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Experimental Evaluation of a Multi-Ejector Trans-critical CO2 System for Supermarkets
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash; Nekså, Petter (Actes du ... Congres international du froid;ICR2019, Chapter; Peer reviewed, 2019) -
Experimental evaluation of multi-ejector based CO2 cooling system for supermarkets in tropical zones
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Maiya, Prakash M.; Nekså, Petter (Purdue e-Pubs;, Chapter, 2018) -
Experimental evaluation of the performance of an ejector for a single compression multi-temperature CO2 refrigeration unit
Fabris, F; Pardiñas, Ángel Á.; Marinetti, Sergio; Rossetti, Antonio; Hafner, Armin; Minetto, Silvia (Science et technique du froid;, Chapter; Peer reviewed, 2022)A novel vapor-compression system concept employing carbon dioxide as the refrigerant is proposed to serve the needs of a typical medium-size refrigerated truck used for multi-temperature (MT and LT) goods delivery. The ... -
Experimental investigation of CO2 systems for Indian supermarkets with parallel configuration of multiejectors (INDEE)
Banasiak, Krzysztof; Singh, Simarpreet; Hafner, Armin; Maiya, Prakash; Nekså, Petter; Pardiñas, Ángel Á. (Actes du ... Congres international du froid;2019, Chapter; Peer reviewed, 2019) -
Experimental investigation on integrated two-stage evaporators for CO2 heat-pump chillers
Hafner, Armin; Hazarika, Mihir Mouchum; Lechi, Federico; Zorzin, Alvaro; Pardiñas, Ángel Á.; Banasiak, Krzysztof (Science et technique du froid;, Chapter; Peer reviewed, 2022)In this experimental study the performance of novel compact evaporator configuration was investigated. What makes this evaporator configuration unique is the integration of a gravity-fed/ self-circulation evaporator loop ... -
An experimental study of an ejector-boosted transcritical R744 refrigeration system including an exergy analysis
Elbarghthi, Anas F.A.; Hafner, Armin; Banasiak, Krzysztof; Dvorak, Vaclav (Peer reviewed; Journal article, 2021)The field of refrigeration witness a massive transition in the supermarket with a strong focus reflected on energy consumption. The use of ejector allows for overcoming the significant exergy destruction lays on the expansion ... -
Experimental study of the heat transfer problem in expansion devices in CO2 refrigeration systems
Mastrowski, Mikolaj; Smolka, Jacek; Hafner, Armin; Haida, Michal; Palacz, Michal; Banasiak, Krzysztof (Journal article; Peer reviewed, 2019)Two expansion devices designed for CO2 refrigeration systems namely, capillary tube and fixed-geometry ejector were experimentally tested in the SINTEF/NTNU laboratory in Trondheim, Norway to determine the influence of ... -
Field data of CO2 integrated refrigeration, heating and cooling systems for supermarkets
Tosato, Giacomo; Minetto, Silvia; Rossetti, Antonio; Hafner, Armin; Schlemminger, Christian; Girotto, Sergio (Science et technique du froid;, Chapter, 2020)The EU H2020 project MultiPACK has given the opportunity of installing three state-of-the art CO2 systems for supermarkets in South Europe, able to supply all the required thermal energy needs of the site, i.e. refrigeration, ... -
Heat pump/chiller system for centralized kitchens in India
Singh, Simarpreet; Hafner, Armin; Banasiak, Krzysztof; Seshadri, Satyanarayanan; Maiya, Prakash; Smitt, Silje Marie; Gabrielii, Cecilia H (Science et technique du froid;, Chapter, 2020)A heat pump unit using CO2 as working fluid is designed to meet not only a part of the heating demand in the centralised kitchen at The Akshaya Patra Foundation, Bengaluru, India, but also the entire cooling demand to ... -
Höchtemperatur-Wärmepumpen mit natürlichen Kältemitteln : Fallstudien zur HTWP-Integration für industrielle Kälte- und Prozessheisswasserherstellung
Schlemminger, Christian; Ahrens, Marcel Ulrich; Foslie, Sverre Stefanussen; Moen, Ole Marius; Bantle, Michael; Hafner, Armin; Jenssen, Sigmund (Chapter; Peer reviewed, 2021) -
Innovative reheat approach of the TES system during the hotel’s standstill operation utilizing a CO2 heat pump/chiller unit
Elarga, Hagar Hassan Hassanein Hassan; Pardiñas, Ángel Á.; Minetto, Silvia; Hafner, Armin (Science et technique du froid;2023-4, Chapter; Peer reviewed, 2023)The implementation of CO2 as a refrigerant is considered one of the solutions to improve the overall building’s energy performance, especially if the heat recovery concept is applied. In this paper, an innovative approach ... -
Integrated CO2 refrigeration and AC unit for hot climates
Kvalsvik, Karoline Husevåg; Banasiak, Krzysztof; Hafner, Armin (Science et technique du froid;2017-2, Chapter; Peer reviewed, 2017) -
Integrated CO2 refrigeration and heat pump systems for dairies
Selvnes, Håkon; Jenssen, Sigmund; Sevault, Alexis; Widell, Kristina Norne; Ahrens, Marcel Ulrich; Ren, Shuai; Hafner, Armin (Science et technique du froid;, Chapter; Peer reviewed, 2022)Production facilities in the food industry are large consumers of electricity and thermal energy due to energyintensive processes such as steam production, cleaning, sanitising, refrigeration and drying. Furthermore, there ... -
Integrated CO2 solutions for supermarkets
Hafner, Armin; Nekså, Petter (Journal article; Peer reviewed, 2018) -
Integrated heating and cooling CO2 heat pump system in a modern distribution centre
Kvalsvik, Karoline Husevåg; Hafner, Armin (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Integrated R744 ejector supportet parallel compression racks for supermarkets : experimental results
Pardiñas, Ángel Á.; Hafner, Armin; Banasiak, Krzysztof (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Integrated R744 ejector supportet parallel compression racks for supermarkets : experimental results
Pardiñas, Ángel Á.; Hafner, Armin; Banasiak, Krzysztof (Science et technique du froid;2018-3, Chapter; Peer reviewed, 2018) -
Integration of gravity-fed evaporators in CO2 based heat-pump chillers
Hazarika, Mihir Mouchum; Bengsch, Jan; Hafsås, Johan; Hafner, Armin; Svendsen, Eirik Starheim; Ye, Zuliang (Chapter; Peer reviewed, 2022)This study is carried out to model a gravity-fed evaporator for CO2 based heat-pump chillers. The gravity-fed evaporator loop consists of a separator, a downcomer, a heat exchanger, and a riser. The working principle is ... -
Investigation of CO2 refrigeration system and thermal energy storage for passenger ships
Andersen, Henrik; Saeed, Muhammad Zahid; Hafner, Armin; Gabrielii, Cecilia H (Science et technique du froid;2023, Chapter; Peer reviewed, 2023) -
Investigation on heat recovery strategies from low temperature food processing plants: Energy analysis and system comparison
Ahrens, Marcel Ulrich; Selvnes, Håkon; Henke, Leon Hendrik; Bantle, Michael; Hafner, Armin (Chapter; Peer reviewed, 2021)Industrial food processing plants often have significant thermal requirements at both low and high temperatures. These plants can produce a variety of products including frozen, chilled and grilled/steamed foodstuff, ...