CO_2跨临界循环系统性能影响的研究进展

Research Progress on System Performance of CO_2 Transcritical Cycle

CO_2因其优良性质被认为是最具有潜力的长期热泵替代工质。然而,实际应用中CO_2循环系统大多采用跨临界循环,其高压侧压力比常规系统要高很多。为了解决这一问题,一些学者尝试将性能优异的冷媒与CO_2组成混合制冷工质应用于CO_2跨临界循环系统中。从国内外CO_2跨临界系统的研究及应用现状出发,总结了当前典型的CO_2混合工质跨临界制冷循环系统,并概述了不同种类添加剂对CO_2热泵系统性能的影响,为CO_2跨临界系统的进一步研究和应用提供了参考和依据。

CO2 is considered to be the most potential long-term alternative refrigerant of heat pump because of its good character.However,the CO2 cycle is mostly work in transcritical cycle,and its high-side pressure is much higher than that of conventional system.To solve this problem,some scholars have tried to combine the excellent refrigerant and CO2 into a hybrid refrigerant and apply it to the CO2 transcritical circulation system.From the research and application situation of CO2 transcritical system at home and abroad,the current typical CO2 mixture transcritical cycle system was reviewed and the effects of different additives on the CO2 heat pump system were summarized.It can provide the reference and basis for further research and application on CO2 transcritical system.