Abstract
The (H)CFC-phase-out and the fear for future problems for other synthetic working fluids, because of their known and unknown impact on the environment, have introduced a rising interest in environmentally safe natural working fluids. CO2 is one of the few non-toxic and non-flammable working fluids that do not contribute to ozone depletion or global warming, if leaked to the atmosphere. Because the critical temperature of CO2 is only 31.1 °C, the transcritical cycle can be used to improve the coefficient of performance of the system. To the gas cooler of transcritical CO2 heat pump system for thermodynamics analysis and test results show that gas cooler on the system's performance has a great influence, so need to the performance analysis of the gas cooler. Analytical process should be taken into account in evaporation temperature, gas cooler outlet temperature and pressure, using exergy analysis method to heat exchanger performance analysis.
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