Performance Analysis of a Heat Pump Using Refrigerant Mixtures (II)

혼합냉매를 사용한 열펌프의 성능해석 (II)

  • 김민수 (서울대학교 대학원 기계공학과) ;
  • 김동섭 (서울대학교 대학원 기계공학과) ;
  • 원성필 (울산대학교 공과대학 기계공학과) ;
  • 노승탁 (서울대학교 공과대학 기계공학과)
  • Published : 1990.08.01

Abstract

Studies on the performance of a heat pump using non-azeotropic refrigerant mixtures are done. In order to estimate the thermodynamic properties for the selected non-azeotropic refrigerant mixtures including R22/R152a, R22/R142b, R22/R114 and R13B1/R152a, Peng-Robinson equation of state is adopted. The pressure-enthalpy diagram and the temperature-entropy diagram are plotted for each refrigerant mixture. Considerations on the capacity modulation for the heat pump system using refrigerant mixtures are taken into. Results show that when the heating load varies, the possibility for the capacity modulation is found in the heat pump system using a compressor with constant volume flow rate. Under a constant heating capacity condition in the heat pump system, the coefficient of performance increases when the refrigerant mixtures are used. The volume flow rate decreases as the mass fraction of lower boiler increases in this case.

Keywords

Acknowledgement

Supported by : 한국과학재단