Experimental Study on the Performance of Heat Pump Using Refrigerant Mixture R22/R142b

R22/R142b 혼합냉매를 사용한 열펌프의 성능

  • 김민수 (서울대학교 정밀기계설계공동연구소) ;
  • 장세동 (서올대학교 대학원 기계공학과) ;
  • 노승탁 (서울대학교 공과대학 기계공학과)
  • Published : 1992.02.01

Abstract

Experimental investigation on the performance of a heat pump system using refrigerant mixtures is done. The condenser and the evaporator are double pipe heat exchangers of counter flow type and the compressor is driven by a variable speed motor. The refrigerant mixture used in the experiment is R22/R142b. Experiments are performed by changing the compressor speed, composition on ratio of mixture, and the average temperatures of condenser and evaporator. The compressor work, heating capacity and the coefficient of performance are calculated. Results show that the heating capacity can be changed by varying the mass flow rate of refrigerant mixtures to meet the heating load. It is shown that the capacity control by changing the composition ratio is more effective than by changing the compressor speed. Under the condition where the external conditions are fixed and the heating loads are equal, the coefficient of performance has its maximum value near 50 : 50 mass fraction of the refrigerant mixture in this study.

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Acknowledgement

Supported by : 한국과학재단