Abstract
Cascading of vapour-compression refrigeration and heat pump systems to produce both cooling and heating for industrial applications is an interesting possibility. As a first step in this direction, a detailed thermodynamic analysis of an idealised hybrid systems is made for various combinations of working fluids R12 or R22 on the refrigeration system and R11, R21 or R12B1 on the heat pump system. Charts and correlations are presented to facilitate the estimation of performance parameters such as COP, isentropic compression work and cooling and heating capacities. For the temperature ranges considered, overall COPs in the range of 9.5–4.0 can be achieved.
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