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Field measurement analysis of centralized refrigeration systems’ evaporators under overfeed conditions.

Number: 0582

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

Summary

Overfeeding the medium temperature level evaporators using liquid ejectors is one of the features of the modern CO2 refrigeration systems for supermarket applications, which provides higher evaporation temperature. The liquid leaving the evaporator is accumulated in a liquid receiver before the compressor and is pumped back to the main receiver before the evaporators by the liquid ejector. This paper uses field measurements of two supermarkets in Sweden. One of the supermarkets is analysed in two days where it operates under overfeed conditions at one day and under dry expansion conditions at the other, providing better understanding of the benefit of overfeeding the cabinets. The first system shows that the evaporation temperature is increased by 2 K (from -6 °C to -4 °C) while the air set point temperature inside the cabinet is kept satisfied. The second system shows that the evaporation temperature can be up to -2.5 °C with a small impact in the cabinets' air set point temperature satisfaction.

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Pages: 10

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Details

  • Original title: Field measurement analysis of centralized refrigeration systems’ evaporators under overfeed conditions.
  • Record ID : 30031811
  • 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.2023.0582

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