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Miscibility analysis of polyol-ester based oil SW32 with R404A and low-GWP refrigerant R452A.

Author(s) : SALEEM A., KIM M. H.

Type of article: IJR article

Summary

Refrigerant/lubricant miscibility plays an important role in the overall thermal performance and reliability of refrigeration and air-conditioning systems. R452A is considred a viable replacement of R404A refrigerant due to its comparible thermophysical properties and low global warming potential. In this paper, the miscibility of a polyol ester based oil SW32 is experimentally investigated with R404A and R452A by varying the oil mass fraction from 5% to 70% over the temperature range of 243.15K to 313.15K. The results revealed R452A is completely miscible with SW32 oil up to 30% oil mass fraction over the whole temperature range considered in the study followed by R404A which showed complete miscibility up to 20% oil mass fraction. Liquid phase separation showed the presence of three different types of immisicibility present for both refrigerant at higher oil mass fractions. Moreover, the low-global warming potential alternative, R452A demonstrated an 18% higher miscibility region with SW32 oil compared to R404A.

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Details

  • Original title: Miscibility analysis of polyol-ester based oil SW32 with R404A and low-GWP refrigerant R452A.
  • Record ID : 30028690
  • Languages: English
  • Subject: HFCs alternatives
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 129
  • Publication date: 2021/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2021.05.002
  • Document available for consultation in the library of the IIR headquarters only.

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