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Supermarket case study: analysis of refrigeration system with heating, air conditioning and ground storage integration.

Number: 0601

Author(s) : THANASOULAS S., SAWALHA S., ARIAS J.

Summary

This paper presents the performance analysis of a well-instrumented supermarket in Sweden where heating, air conditioning and ground storage are integrated into a booster trans-critical CO2 refrigeration system. The supermarket has applied several features of a state-of-the-art system, including overfeed evaporators, 2-stage heat recovery, and air conditioning. Two warm and two cold days operation are used for the control and the performance investigation. The heat recovery follows the theoretical control strategy, where the setpoint temperature for the discharge pressure is the forward water temperature to the heating system. The combination of low water temperature return from the space heating system and 2-stage heat recovery provides efficient operation; COP heating is estimated around 6. The warm days study shows that importance of fast fault detection which resulted in 16% energy savings in this case study. The fault drives to limitation of the air conditioning capacity and as result indoor temperature increment. The air conditioning COP is estimated around 2.5 for both warm days, with potential of 20% increase in the COP with optimized operation without thermal leakage to the ground.

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Pages: 10

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Details

  • Original title: Supermarket case study: analysis of refrigeration system with heating, air conditioning and ground storage integration.
  • Record ID : 30031813
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0601

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