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Performance evaluation of near-azeotropic R-502 alternative refrigerants.

Author(s) : SHIN J. S., KIM M. H.

Summary

As a long-term alternative for R-502, environmentally friendly refrigerant mixtures were proposed and performance evaluations of refrigeration system with alternatives were conducted. Two newly proposed refrigerants are near-azeotropic binary mixtures, R-152a/R-1270 (35/65 by wt.%) and R-290/DME (35/65 by wt.%). These two alternatives have zero ODP (Ozone Depletion Potential) and much less GWP (Global Warming Potential) than R-502 and R-404A. They have excellent thermodynamic and transport properties. In this study, thermodynamic refrigeration cycle analysis was performed, and cycle characteristics such as cooling capacity, coefficient of performance, suction and discharge pressures and temperatures are compared to those for the baseline R-502 and the R-404A systems. In addition, performance evaluation tests were conducted with evaporation temperature of 5°C, condensation temperature of 45°C, subcooling temperature of 5°C, superheating temperature of 5°C. Comparisons between R-404A and R-290/DME (35/65 by wt.%) were carried out on the same cooling capacity. The system performance of newly proposed refrigerant mixture showed promising results.

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Pages: 2006-2

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Details

  • Original title: Performance evaluation of near-azeotropic R-502 alternative refrigerants.
  • Record ID : 2008-0069
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

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