节能2026，Vol.45Issue(1)：66-71,6.DOI:10.3969/j.issn.1004-7948.2026.01.016
混合工质在复叠式热泵中的性能研究
Research on the performance of mixed working fluids in cascade heat pumps
摘要
Abstract
To explore the influence of the selection of mixed working fluids on the performance of the cascade heat pump system,the working principle of the cascade heat pump is systematically elaborated,and the screening process of mixed working fluids is described.The model of the cascade heat pump is designed and simulated using Matlab,and the REFPROP software is called to analyze the effects of factors such as condensation and evaporation pressures,compressor power consumption,mass fraction,and intermediate condensation temperature of different mixed working fluids on the energy efficiency ratio(COP).The results show that the application of 3 types of mixed working fluids increases the condensation pressure by 8.60%to 25.40%and the evaporation pressure by 8.70%to 26.23%.When the mass fraction of R134a is 10%,the compressor power consumption of the R134a+R152a combination is lower,at 24.26 kW.Compared with the other 3 groups of working fluids,the COP of the R152a+R1234ze combination is higher,reaching 3.27.For the cascade heat pump system,different mixed working fluids have specific optimal intermediate condensation temperatures,and the R152a+R1234ze combination has the lowest power consumption of 48.28 kW.As a low-temperature-level mixed working fluid,R152a+R1234ze always maintains the maximum COP when the low-temperature evaporation temperature and high-temperature condensation temperature change.关键词
复叠式热泵/节能减排/混合工质Key words
cascade heat pump/energy-saving and emission reduction/mixed working fluids分类
能源科技引用本文复制引用
段棋,宋海琛,聂小龙,李欣,吴维成,张静..混合工质在复叠式热泵中的性能研究[J].节能,2026,45(1):66-71,6.基金项目
辽宁省科技计划联合计划(项目编号:2023JH2/101700251) （项目编号:2023JH2/101700251）
辽宁省"揭榜挂帅"科技计划(项目编号:2023020439-JH1/104) （项目编号:2023020439-JH1/104）
