Blar i NTNU Open på forfatter "Banasiak, Krzysztof"
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Testing of tri-partite CO2 gas cooler prototype for domestic hot water and space heating
Tolstorebrov, Ignat; Zendehboudi, Alireza; Banasiak, Krzysztof; Köster, Lukas; Álvarez Pardiñas, Ángel; Hafner, Armin (Chapter, 2020)The aim of this study was to test a tri-partite gas cooler for CO2 heat pumps (5-13 kW). The proposed heat exchanger allowed the simultaneous and separate production of space heating and domestic hot water with an integrated ... -
The R744 multi-ejector hybrid CFD and experimentally-based reduced-order model
Haida, Michal; Smolka, Jacek; Hafner, Armin; Palacz, Michal; Ostrowski, Zeimowit; Madsen, Kenneth B.; Försterling, Sven; Nowak, Andrzej J.; Banasiak, Krzysztof (Chapter, 2018)The proposed hybrid reduced-order model (HROM) of the four R744 fixed ejectors installed in the multiejector module is presented. The ejectors HROM was built by use of the proper orthogonal decomposition together with the ... -
Thermodynamic Performance Investigation of Commercial R744 Booster Refrigeration Plants Based on Advanced Exergy Analysis
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof (Journal article; Peer reviewed, 2019)After the recent renewed interest in CO2 as the refrigerant (R744) for the food retail industry, many researchers have focused on the performance enhancement of the basic transcritical R744 supermarket refrigeration unit ... -
Transcritical R744 refrigeration systems for supermarket applications: Current status and future perspectives
Gullo, Paride; Hafner, Armin; Banasiak, Krzysztof (Journal article; Peer reviewed, 2018)Visible signs of climate change call for urgent actions on food retail industry, since such a sector is characterized by an abundant carbon footprint. Being CO2 (or R744) recognised across the world as the most promising ... -
Two-stage evaporator for R744 heat pumps using greywater as heat source
Pardiñas, Ángel Á.; Kauko, Hanne Laura Pauliina; Hazarika, Mihir Mouchum; Selvnes, Håkon; Banasiak, Krzysztof; Hafner, Armin (Peer reviewed; Journal article, 2023)Heat pumps are pinpointed as a key technology in decarbonizing buildings' heat supply, which is currently dominated by fossil-fuel based systems. To minimize the environmental impact of heat pumps over their lifetime, ...