摘要
针对非共沸混合制冷工质单级压缩回热制冷循环,分析了LHR循环的特点及主要研究问题。根据非共沸混合制冷工质的特性,讨论并选取了适合于-70℃低温冷柜的混合制冷工质R23和R600a。利用制冷工质物性分析软件NIST Refprop 8.0初步研究了不同配比时制冷系统的特性,然后通过实验方法从不同角度分析混合制冷工质的配比对系统性能的影响,最终得到比较合理的混合制冷工质R23/R600a组分比例3:7。同时分析了该配比下制冷压缩机排气温度、压比、低温冷柜内温度等的变化特点,最后对蒸发器的温度变化特性和回热器的温度变化特性进行了总结。
The single-stage compression heat regenerative cycle of zeotropic refrigerant mixtures was studied. The Linde-Hampson refrigeration cycle characteristics and the main problems were analyzed. The refrigerant mixture R23 and R600a was discussed and selected suitable for -70℃ low temperature refrigerator according to the zeotropic mixture refrigerant properties. The refrigeration system characteristics of different ratio were discussed using refrigerant property analysis software NIST Refprop 8.0. It was compared with the performance of the system through experimental methods under different ratio of refrigerant mixture from different aspects. Finally the reasonable refrigerant mixture R23 / R600a component ratio 3：7 was obtained. The proportion of refrigeration compressor discharge temperature, pressure ratio, and low temperature refrigerator temperature change characteristics was analyzed. And the evaporator and the heat regenerator temperature change characteristics were discussed.
出处
《制冷学报》
CAS
CSCD
北大核心
2012年第6期63-67,共5页
Journal of Refrigeration
基金
国家自然科学基金(51176124)资助项目
上海市优秀学科带头人项目(10XD1403100)
上海市重点学科建设项目(S30503)资助~~
关键词
工程热物理
混合工质
单级压缩
回热循环
实验研究
Engineering thermophysics
Mixed refrigerant
Single-stage compression
Regenerative cycle
Experimental study
