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Heat recovery impact on eco-efficiency of retail refrigerating units.

Number: 0923

Author(s) : RACHED W., WISNIK P., BERNARDI J. de

Summary

Heating is a major CO2 emission source in the European Union (EU). Major heating sources use the combustion of hydrocarbon gas mixtures. The combustion of these mixtures produces more than 250 g of eCO2 and 0.055g of NOx for each kWh produced. This paper will investigate the heat recovery aspect from supermarket refrigeration system to produce heating and hot water. Different technologies using R-455A and R744 refrigerants are analysed and compared in function of the ambient conditions and for different climate zone. The results show that heat for heating and hot water should be recovered from R-455A and R744 refrigeration systems without increasing the condensing pressure above the level corresponding to the current ambient temperature. Refrigeration technologies should always use floating condenser/gas cooler pressure to increase refrigeration system COP and produce heat recovery with zero additional electricity cost. Increasing condenser/gas cooler pressure leads to global performance degradation versus other technologies like independent heat pumps.

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Paper: Heat recovery impact on eco-efficiency of retail refrigerating units

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Details

  • Original title: Heat recovery impact on eco-efficiency of retail refrigerating units.
  • Record ID : 30031853
  • 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.2023.0923

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