The Performance Analysis of an Integrated CO 2 Refrigeration System with Multi-Ejectors Installed in a Supermarket

Engin Söylemez, Armin Hafner, Christian Schlemminger, Ekaterini E. Kriezi and Vahid Khorshidi
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Engin Söylemez: Process and Power Research Group Trondheim, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
Armin Hafner: Process and Power Research Group Trondheim, Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
Christian Schlemminger: Sintef Energy Research, Department of Thermal Energy, 7465 Trondheim, Norway
Ekaterini E. Kriezi: RAC R&D Danfoss A/S -Nordborgvej 81, 6430 Nordborg, Denmark
Vahid Khorshidi: RAC R&D Danfoss A/S -Nordborgvej 81, 6430 Nordborg, Denmark

Energies, 2022, vol. 15, issue 9, 1-16

Abstract: The field data from an integrated CO 2 refrigeration system installed in a supermarket located north of the capital of Lisbon was analyzed. The goal was to demonstrate the effect and performance of multi-ejectors on a refrigeration system operating in a warm climate. The measurement results for the system with and without activating ejectors were compared. It was observed that the system with a multi-ejector operation had considerable performance superiority. The ejectors improved the cooling capacity of the medium temperature stage of the system by 17.4%. The system with active ejectors had 7.5% less total power consumption compared to the ejector off mode of the same system.

Keywords: R-744; integrated CO 2; supermarket; transcritical; ejectors; power consumption; refrigeration (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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