CO2亚临界制冷系统热力学性能分析  

Thermodynamic analysis of the CO_2 subcritical refrigeration system

作　　者：申江[1] 汪倍倍 周成君 胡开永[1] 杨建国 Shen Jiang;Wang Beibei;Zhou Chengjun;Hu Kmyong;Yang Jianguo(Tianjin Key Lab of Refrigeration TechnoIogy,Tianjin University of Commerce,Tianjin 300134,China;KL Refngerstion Equipment Co.Ltd.,Beijing 101302,China)

机构地区：[1]天津商业大学,天津市制冷技术重点实验室,天津300134 [2]北京市京科伦冷冻设备有限公司,北京101302

出　　处：《低温与超导》2018年第12期91-95,共5页Cryogenics and Superconductivity

摘　　要：用分析方法对CO_2亚临界制冷系统性能进行分析。通过建立CO_2亚临界制冷系统热力学模型,分析不同中间温度、冷凝温度对系统效率和压缩机排气温度等性能参数的影响,结果表明:制冷循环系统存在最佳中间温度,在此中间温度时获得最大系统效率和最低压缩机排气温度,随着冷凝温度的减小,压缩机排气温度下降,获得最低排气温度的中间温度减小。在系统部件中,压缩机和冷凝器的损占总损的比例较大,需进行重点优化。In this paper,the exergy was analyzed to evaluate the performance characteristics of CO2suberitical refrigeration system.Thermodynamic models of C02 saberitieal refrigeration system was established.The variations of exergy efficiency of the refrigeration system and exhaust temperature of the compressor with the operating parameters such as intermediate temperature, condensing temperature were investigated.The analysis results show that the refrigeration cycle system has the optimum intermedi- ate temperature.At the optimum intermediate temperature,the exergy effieieney of the refrigeration system reaches the maximum and the exhaust temperature of the compressor is the minimum.With the decreasing of the condensation temperature,the exhaust temperature of the compressor decreases,and the optimum intermediate temperature (at that temperature the minimum exhaust temperature of the compressor is obtained)decreases.In addition,the compressor and condenser contribute the most exergy loss.

关 键 词：CO2亚临界制冷系统 热力学分析 (火用)效率 系统优化 

分 类 号：TB657[一般工业技术—制冷工程]