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Forty years of courting R32: personal retrospective on its properties and design considerations in refrigeration, air-conditioning, and heat pumping.

Number: pap. n. 607

Author(s) : KAZACHKI G.

Summary

The analysis of refrigerants for one-stage, low-temperature applications brought attention on R32 forty years ago. The analysis covered 20 refrigerants with normal boiling points ranging from that of R-12 to R13B1. A second consideration of R-32 was given in 1992 while analysing available alternatives to R-22 and R-502 in supermarket refrigeration in a range of evaporating temperatures from -45°C to +7°C at a condensing temperature 43°C. The current study explores design approaches that could broaden R32 application limits in low- and medium refrigeration, air conditioning, and heat pumping, mainly with hermetic and semi-hermetic compressors. Factors, such as controlled superheat at the compressor inlet and enhanced compressor isentropic and electric motor efficiencies are quantified to reflect opportunities for R32 application in secondary-coolant and distributed low- and medium-temperature supermarket refrigeration systems. New materials used in compressors could lead to allowing higher temperature level and broader application limits for R32 as well.

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Pages: 7 p.

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Details

  • Original title: Forty years of courting R32: personal retrospective on its properties and design considerations in refrigeration, air-conditioning, and heat pumping.
  • Record ID : 30015737
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0607

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