制冷技术2016，Vol.36Issue(4)：8-13,35,7.DOI:10.3969/j.issn.2095-4468.2016.04.102
CO2跨临界双级压缩制冷循环的热力学分析
Thermodynamic Analysis of CO2 Transcritical Two-stage Compression Refrigeration Cycle
摘要
Abstract
Based on a variety of CO2 transcritical single stage compression refrigeration cycle, six thermodynamic models for CO2 transcritical two-stage compression refrigeration system were established in this paper, and the effects of the design parameters, including the evaporating temperature, the gas cooler outlet temperature, and the compressor efficiencies for high pressure stage and low pressure stage on the coefficient of performance (COP) in these systems were analyzed. The results showed that the outlet temperature of gas cooler and the compressor efficiency of low pressure stage are the major influencing factors for COP. At the same time, comparing the six systems, it was found that the performance coefficient and the operation safety in the two-stage compression system with incomplete cooling in the middle of the double-throttling were best among these systems under given high pressure conditions. The research results would provide the reference for the optimization design of CO2 transcritical two-stage compression refrigeration system.关键词
CO2/跨临界双级压缩/性能系数/蒸发温度/二次节流Key words
CO2/Transcritical two-stage compression/Coefficient of performance/Double-throttling引用本文复制引用
刘圣春,李正..CO2跨临界双级压缩制冷循环的热力学分析[J].制冷技术,2016,36(4):8-13,35,7.基金项目
天津市科技特派员项目（No.15JCTPJC62600）。 （）
