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Influence of the evaporating temperature on lower GWP refrigerants used in a compound waste heat-solar driven ejector- compression heat pump.

Number: 2104

Author(s) : AL-SAYYAB A. K. S., MOTA BABILONI A., FERNANDEZ MORENO A., GIMÉNEZ-PRADES P., NAVARRO-ESBRÍ J.

Summary

This work investigates the theoretical influence of the evaporating temperature on the performance of a compound waste heat-solar driven ejector-solar assisted heat pump. R450A and R513A are the alternative refrigerants to be compared to the hydrofluorocarbon R134a. The system recovers waste heat from PV/T (photovoltaic thermal) panels and a condenser located in an industrial process. Five levels of evaporating temperature, from 10 to 18 °C, are proposed. R134a is mainly affected by higher evaporating temperatures, particularly for a system located in Valencia. This increase makes the COP of three refrigerants similar at the highest evaporating temperatures, whereas, at the lowest value considered, R513A presents the highest energy performance. For the rest of the cities, this parameter also affects more significant for Berlin than Stockholm. R513A is the best refrigerant at the lowest evaporating conditions in these locations, and there is a match between the fluids at the contrary conditions.

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Details

  • Original title: Influence of the evaporating temperature on lower GWP refrigerants used in a compound waste heat-solar driven ejector- compression heat pump.
  • Record ID : 30028934
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 6th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2021/09/01
  • DOI: http://dx.doi.org/10.18462/iir.TPTPR.2021.2104
  • Document available for consultation in the library of the IIR headquarters only.

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