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Influence of subcooling in R449A supermarket low-temperature refrigeration circuit using medium temperature cooling load.

Number: 0002

Author(s) : MOTA BABILONI A., GIMÉNEZ-PRADES P., UDROIU C-M., BARRAGÁN-CERVERA A., ESBRÍ J. N.

Summary

This work studies the impact of subcooling in supermarket refrigeration systems with medium and low temperature requirementsbased on a vapor compression single-stage with a subcooler. The energy performance (measured by the coefficient of performance, COP) of the low-temperature circuit has been analyzed considering the current system (with subcooling) and compared with a semi-empirical scenario without a subcooler. For a fixed cooling capacity, the new design compressors selected for R-449A reduce the compressor power consumption compared to the measurements, increasing COP, particularly at low-temperature lifts. Among the subcooler and no subcooler options, the differences are negligible in overall COP because the differences in COP for each stage are compensated. Carbon emissions calculated with the total equivalent warming impact (TEWI) are slightly lower in the configuration without a subcooler. From an energy and environmental point of view, it is not advisable to use subcooling in R-449A supermarket refrigeration.

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Pages: 7 p.

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Details

  • Original title: Influence of subcooling in R449A supermarket low-temperature refrigeration circuit using medium temperature cooling load.
  • Record ID : 30031012
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: 3rd IIR conference on HFO Refrigerants and low GWP Blends. Shanghai, China.
  • Publication date: 2023/04/05
  • DOI: http://dx.doi.org/10.18462/iir.HFO2023.0002

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