Performance Evaluation of Chlorine Free Zeotropic Refrigerant Mixtures in Heat Pumps.
Performance Evaluation of Chlorine Free Zeotropic
Refrigerant Mixtures in Heat Pumps.
Pannock, J.; Didion, D. S.; Radermacher, R.
International Institute of Refrigeration. Proceedings.
July 1992, 1992.
refrigerants; heat pumps; chlorine; performance
evaluation; fluids; mixtures; ozone; temperature; heat
transfer; computer simulation; mixtures; entropy
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