Investigation of the potential effect of zeotropic refrigerant mixture on performance of a hot water heat pump

The refrigerant R-22, which is currently being used in hot water heat pumps, delivers hot water at temperatures of 60 degree C to 65 degree C (140 degree F to 149 degree F). This temperature is adequate for domestic use but is low when compared to temperatures that can be delivered by fossil fuel an...

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Bibliographic Details
Main Authors: Smit, Floris J, Meyer, Josua P
Format: Conference Proceeding
Language:English
Subjects:
COMPARATIVE EVALUATIONS
Composition effects
DESIGN
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
HEAT PUMPS
Heating
MIXTURES
REFRIGERANTS
WATER HEATERS
WATER HEATING
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Summary:The refrigerant R-22, which is currently being used in hot water heat pumps, delivers hot water at temperatures of 60 degree C to 65 degree C (140 degree F to 149 degree F). This temperature is adequate for domestic use but is low when compared to temperatures that can be delivered by fossil fuel and direct electric resistance systems. This limits the potential applications of hot water heat pumps. In this study, it is shown analytically that a zeotropic mixture of R-22 and R-142b can be used to obtain higher temperatures. It was found that in certain cases, depending on the concentrations, not only are increased hot water temperatures possible, but an improved heating capacity as well as an improvement in the coefficient of performance are also possible.
ISSN:0001-2505