R290家用空调器性能研究

Research on the performance of R290 household air conditioner

为了探讨R290在家用分体空调器中替代R32的优化方向,对R290和R32进行了热物性对比分析、热力循环计算及同平台下两种制冷剂整机测试分析。系统循环计算结果表明R290逆卡诺理论循环性能优于R32;整机测试结果表明R290额定制冷能效比减少16.8%,额定制热能效比减少5.6%。R290整机系统能效衰减的主要原因在于R290饱和温度随压力波动的稳定性差,因此降低低压侧压力损失成为R290系统提效的重要方向。

In order to explore the optimization direction of using R290 as a substitute for R32 in residential split air conditioners,conducted comparative analysis,including thermal property analysis,thermodynamic cycle calculation,and testing analysis of the two refrigerants on the same platform.The results of the system cycle calculations showed that the theoretical Carnot cycle performance of R290 is superior to R32.The results of the whole machine testing show that the rated refrigeration energy efficiency ratio of R290 decreased by 16.8%,and the rated heating energy efficiency ratio decreased by 5.6%.The main reason for the decrease in the overall efficiency of the R290 system is the poor stability of the saturation temperature of R290 with pressure fluctuations.Therefore,reducing the pressure loss on the low-pressure side becomes the key direction to improve the efficiency of the R290 system.