Abstract
Abstract Modern expander applications in refrigeration are associated with two-phase expanders to replace the irreversible throttling process of liquid refrigerants. This paper relates to vapor expander applications utilizing available waste heat for complete power recovery to drive power-consuming equipment of R134a air conditioning systems and reducing the global warming effect. The vapor compression and expansion refrigeration cycle is introduced and its thermodynamic analysis is provided. The calculated performance characteristics on boiling temperature in the boiler, condensing temperature in the condenser, evaporating temperature in the evaporator, and compressor and expander isentropic efficiencies are presented and compared with the regular refrigeration cycle and the two-phase expander refrigeration cycle.
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