CO_2两级压缩不同循环模式热力学对比分析

Thermal dynamic comparison and analysis of different cycles of CO_2 two-stage compression

对CO_2跨临界循环两级压缩的一级节流中间完全冷却,一级节流中间不完全冷却,两级节流中间完全冷却,两级节流中间不完全冷却四种运行模式下的理论循环进行了建模和热力分析,对循环的关键参数进行了数值计算,做了对比分析。得出结论:回热器对不同循环模式有不同影响;不同循环模式中,两级节流、中间不完全冷却的COP最大。

In this paper, four different cycles of CO2 transcritical system were compared and analysed for single -throttling complete cooling, single- throttling incomplete cooling, double -throttling complete cooling, double -throttling incomplete cool- ing. The key parameters of cycles were calculated and compared. The results show the regenerator has a different influence on different cycles and the cycle of two - stage throttling incomplete cooling has the bigest COP.