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Thermodynamic analysis and selection of refrigerants for high-temperature heat pumps.

Number: pap. n. 1193

Author(s) : CORBERÁN J. M., HASSAN A. H., PAYÁ J.

Summary

This paper presents an analysis of the performance of high-temperature heat pumps using different refrigerants. A thermodynamic cycle model, considering minimum temperature difference at the heat exchangers pinch point, and reasonable pressure drop and efficiencies, has been developed. The source temperature was fixed at 80 °C, as a reference, while the temperature lift between sink and source was varied from 40 to 80 K to cover a wide range of applications. The selected refrigerants were categorized into three groups, wet, dry, and isentropic, based on the slope of saturated vapor curve on T-s diagram. The results showed that isentropic refrigerants, R-245fa, R-1233zd(E), and Butene, have the highest performance compared to dry and wet refrigerants. R-1233zd(E) is considered to be the most suitable one regarding performance and safety, however it only allows a maximum temperature lift of 73 K. Acetone seems to be a good candidate for higher temperature lifts.

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Pages: 8

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Details

  • Original title: Thermodynamic analysis and selection of refrigerants for high-temperature heat pumps.
  • Record ID : 30026522
  • Languages: English
  • Subject: HFCs alternatives
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1193

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