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Performance of alternative refrigerant mixtures for HCFC-22.

Author(s) : JUNG D., SONG Y., PARK B.

Type of article: Article, IJR article

Summary

In this study, 14 refrigerant mixtures composed of R32, R125, R134a, R152a, R290 (propane) and R1270 (propylene) were tested in a breadboard heat pump in an attempt to substitute HCFC-22 used in residential air-conditioners. The heat pump was of 3.5 kW capacity with water as the heat transformer fluid (HTF) in the evaporator and condenser that are in a counter current flow configuration. All tests were conducted with the HTF temperatures fixed to those found in the ARI test A condition. Test results show that ternary mixtures composed of R32, R125, and R134a have a 4-5% higher COP and capacity than HCFC-22. On the other hand, ternary mixtures containing R125, R134a and R152a have both lower COPs and capacities than HCFC-22. R32/R134a binary mixtures show a 7% increase in COP with the similar capacity to that of HCFC-22 while R290/R134a azeotrope shows a 3-4% increases in both COP and capacity. The compressor discharge temperatures of the mixtures tested are much lower than those pf HCFC-22, indicating that these mixtures would offer better system reliability and longer life time than HCFC-22. Finally, test results with a suction line heat exchanger (SLHX) indicate that SLHX must be used with special care in air-conditioners. Since its effect is fluid dependent.

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Pages: 466-474

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Details

  • Original title: Performance of alternative refrigerant mixtures for HCFC-22.
  • Record ID : 2000-2400
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 6
  • Publication date: 2000/09

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