涡流管膨胀的二氧化碳跨临界制冷循环性能研究  

Research on Performance of Carbon Dioxide Trans-critical Refrigeration Cycle with Vortex Tube Expansion

作　　者：刘业凤[1] 孙影 张华[1] 唐丹萍 钟文轩 王东亮 LIU Yefeng;SUN Ying;ZHANG Hua;TANG Danping;ZHONG Wenxuan;WANG Dongliang(School of Energy and Power Engineering Institute,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷技术》2019年第1期11-15,共5页Chinese Journal of Refrigeration Technology

基　　金：上海市浦江人才计划(No.17PJ1407200);上海市技术性贸易措施应对专项项目(No.16TBT012)

摘　　要：本文提出在二氧化碳跨临界制冷循环中,采用涡流管膨胀代替常规的膨胀阀节流,以减少系统的不可逆损失,提高系统性能系数(COP)。本文介绍了涡流管膨胀的二氧化碳跨临界制冷循环的工作原理,分析了系统特点,进行了热力学计算,并与常规的膨胀阀节流系统进行了性能对比分析。研究结果表明:气体冷却器出口温度和排气压力对涡流管系统COP的提高具有显著影响。气冷器出口温度越高、排气压力越低,涡流管系统的COP增加得越显著,可增加30%左右;提高涡流管等熵效率和冷质量分数也可使涡流管系统COP增加10%左右。In this paper, a vortex tube is used to replace the conventional throttle valve in the carbon dioxide trans-critical refrigeration cycle system to reduce the irreversible loss and to improve the coefficient of performance (COP). The working principle of the vortex tube system is introduced, and its features are analyzed. The performance of the system and the traditional system with a throttle valve are calculated and compared. The results show that the outlet temperatures of gas cooler and discharge pressure are main influence factors. The higher the outlet temperatures of gas cooler and the lower the discharge pressures are, the higher the proposed system COP is, and the COP increased by about 30%. The increase of isentropic efficiency of vortex tube and the cooling mass fraction can increase COP by about 10%.

关 键 词：二氧化碳 跨临界制冷循环 涡流管 性能系数 

分 类 号：TB657[一般工业技术—制冷工程]