Investigation on performance for the two stage transcritical CO2 cycle with injector

This paper analyzed the performance of CO2 trans-critical two-stage compression/ejection refrigeration cycle, and contrasted it with the CO2 trans-critical two-stage compression refrigeration cycle. Under stable operation conditions, effects of heat rejection pressure, outlet temperature of gascooler, evaporation temperature and super-heat of compressor on the COP are investigated. Aimed at providing the reference for the optimization design of trans-critical CO2 refrigeration system.