Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Performance of R290 and R1270 as Alternative Refrigerants of R22 According to Temperature Variations of Evaporator and Condenser

증발기와 응축기 온도변화에 따른 R22 대체냉매 R290 및 R1270의 성능평가

  • 백인철 (인하대학교 대학원 기계공학과) ;
  • 박기정 (인하대학교 대학원 기계공학과) ;
  • 심윤보 (인하대학교 대학원 기계공학과) ;
  • 정동수 (인하대학교 기계공학과)
  • Published : 2006.10.01
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Abstract

In this study, performance of 2 pure hydrocarbons R290 and R1270 was measured in an attempt to substitute R22 under 3 different temperature conditions. They were tested in a refrigerating bench tester with a hermetic rotary compressor. The test bench provided about 3.5 kW capacity and water and water/glycol mixture were employed as the secondary heat transfer fluids. All tests were conducted under the same external conditions resulting in the average saturation temperatures of $7/45^{\circ}C$ and $-7/41^{\circ}C$ and $-21/28^{\circ}C$ in the evaporator and condenser, respectively. Test results show that the coefficient of performance (COP) of these refrigerants is up to 11.54% higher than that of R22 in all temperature conditions. Compressor discharge temperatures were reduced by $14{\sim}31^{\circ}C$ with these fluids. There was no problem with mineral oil since the mixtures were mainly composed of hydrocarbons. The amount of charge was reduced up to 58% as compared to R22. Overall, these fluids provide good performance with reasonable energy savings without any environmental problem and thus can be used as long term alternatives for residential air-conditioning and heat pumping application.

Keywords

References

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