R600/R170/R14三级自复叠制冷系统性能研究  

Performance study on R600/R170/R14 three-stage auto-cascade refrigeration system

作　　者：何永宁 邬辉红 许柯 邢林芬 张海清 吴学红 金听祥 He Yongning;Wu Huihong;Xu Ke;Xing Linfen;Zhang Haiqing;Wu Xuehong;Jin Tingxiang(School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;Machinery Industry No.6 Design Research Institution,Zhengzhou 450001,China)

机构地区：[1]郑州轻工业大学能源与动力工程学院,郑州450001 [2]机械工业第六设计研究院有限公司,郑州450001

出　　处：《低温与超导》2023年第5期71-77,84,共8页Cryogenics and Superconductivity

基　　金：河南省科技攻关项目(222102320269);郑州轻工业大学博士科研基金(2021BSJJ045)资助。

摘　　要：针对超低温冰箱制取-90℃以下温度的需求,提出了采用碳氢制冷剂替代传统制冷工质的三级自复叠制冷(ACR)系统。在变工况下,分别对采用R134a/R23/R14、R600/R23/R14和R600/R170/R14的三级ACR系统进行性能对比分析。结果表明,在蒸发器出口温度为-90℃(冷凝器出口温度为30℃)的工况下,R600/R23/R14和R600/R170/R14的COP相比R134a/R23/R14分别提高57.4%和72.3%。在冷凝器出口温度为20℃(蒸发器出口温度为-100℃)的工况下,R600/R170/R14的COP相比R600/R23/R14可提高13.9%。为获得-100℃的低温,R600/R170/R14(质量分数为0.24/0.12/0.64)是水冷三级ACR系统的最佳制冷剂选择,其系统COP为0.396。In view of the demand for temperature below-90℃in ultra-low-temperature freezers,a three-stage auto-cascade refrigeration(ACR)system using hydrocarbons instead of traditional refrigerants was proposed.Under variable working conditions,the system performances of ACR using R134a/R23/R14,R600/R23/R14 and R600/R170/R14 were analyzed respectively.The results show that with the evaporator outlet temperature is-90℃(the condenser outlet temperature is 30℃),the COP of R600/R23/R14 and R600/R170/R14 are 57.4%and 72.3%higher than R134a/R23/R14,respectively.When the condenser outlet temperature is 20℃(the evaporator outlet temperature is-100℃),the COP of R600/R170/R14 is 13.9%higher than R134a/R23/R14.To achieve-100℃or even lower temperature,R600/R170/R14 with a mass fraction of 0.24/0.12/0.64 is the best choice for the water-cooled three-stage ACR system,and system COP is 0.396.

关 键 词：三级ACR系统 配比优化 制冷剂替代 性能对比 

分 类 号：TB657[一般工业技术—制冷工程]