In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been ...In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been proposed as the working fiuids to adjust thecapacity of the system with load change. The results show that if it is effective to control therefrigerant composition and capacities, the improvements for the seasonal energy efficiencyratio will be obtained.展开更多
A group contribution method is designed for the estimation of basic properties(normal boiling poillt, critical temperature and critical pressure) of new heat pump working fluids.The average relative errors of the prop...A group contribution method is designed for the estimation of basic properties(normal boiling poillt, critical temperature and critical pressure) of new heat pump working fluids.The average relative errors of the proposed method for estimating Tb, Tc and Pc are 1.29%,1.31% and 2.38% respectively. As a result of the application of the method, 14 stratospherically safe heat pump working fluids are selected as alternatives of Rll4 when the condensing temperature is about 80℃.展开更多
文摘In this paper, the properties and energy saving protential of a capacity control systemby varing the composition of a mixture has been analysized and experimented. The mixturesR22/142b, R32/124 and R32/134a have been proposed as the working fiuids to adjust thecapacity of the system with load change. The results show that if it is effective to control therefrigerant composition and capacities, the improvements for the seasonal energy efficiencyratio will be obtained.
文摘A group contribution method is designed for the estimation of basic properties(normal boiling poillt, critical temperature and critical pressure) of new heat pump working fluids.The average relative errors of the proposed method for estimating Tb, Tc and Pc are 1.29%,1.31% and 2.38% respectively. As a result of the application of the method, 14 stratospherically safe heat pump working fluids are selected as alternatives of Rll4 when the condensing temperature is about 80℃.