CO_2跨临界双级压缩制冷循环的热力学分析  

Thermodynamic analysis of CO_2 trans-critical two-stage compression refrigeration cycle

作　　者：谢英柏[1] 孙刚磊[1] 刘春涛[1] 刘迎福[1] 

机构地区：[1]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《化工学报》2008年第12期2985-2989,共5页CIESC Journal

摘　　要：Two-stage vapor compression refrigeration cycle was accomplished with an intercooler.The state of the refrigerant vapor leaving the intercooler affects the system performance.The thermodynamic analysis of the trans-critical two-stage refrigeration cycle using CO2 as the refrigerant was made with a condensing temperature of 35℃.When the intercooler operated at about the geometric mean of the evaporating and condensing pressures,compared with the single stage cycle,the coefficient of performance(COP)of the two-stage cycle was improved.As the degree of superheating of the CO2 vapor leaving the intercooler increased,the COP of the two-stage system decreased.Two-stage vapor compression refrigeration cycle was accomplished with an intercooler. The state of the refrigerant vapor leaving the intercooler affects the system performance. The thermodynamic analysis of the trans-critical two-stage refrigeration cycle using COz as the refrigerant was made with a condensing temperature of 35~C. When the intercooler operated at about the geometric mean of the evaporating and condensing pressures, compared with the single stage cycle, the coefficient of performance （COP） of the two-stage cycle was improved. As the degree of superheating of the CO2 vapor leaving the intercooler increased, the COP of the two-stage system decreased.

关 键 词：跨临界双级制冷循环 CO2 中间冷却 热力学分析 性能系数 

分 类 号：TB61[一般工业技术—制冷工程]