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Performance Evaluation of Chlorine Free Zeotropic Refrigerant Mixtures in Heat Pumps.


pdf icon Performance Evaluation of Chlorine Free Zeotropic Refrigerant Mixtures in Heat Pumps. (4059 K)
Pannock, J.; Didion, D. S.; Radermacher, R.

International Institute of Refrigeration. Proceedings. July 1992, 1992.

Keywords:

refrigerants; heat pumps; chlorine; performance evaluation; fluids; mixtures; ozone; temperature; heat transfer; computer simulation; mixtures; entropy

Abstract:

Fifteen binary zeotropic refrigerant mixtures consisting of the components R23, R32, R125, R133a, R143a, and R152a are investigated as possible replacement fluids for R22. The two mixtures of R32/R134a and R32/R152a showed COP improvements over R22 of up to 24% (depending on the operating condition and mixture composition) at the same capacity as with R22 while using counter flow heat exchange in evaporator and condenser. The use of a liquid line to suction line heat exchanger proved to be advantageous for both mixtures. The overall conductance for both mixtures is evaluated to be equal to or up to 22% greater (R32/R152a) than that of R22. Therefore, the heat exchanger size used with R22 should be sufficient to achieve performance increases with these zeotropic mixtures.