自复叠制冷循环双温冰箱的理论与实验研究  

Simulation and experiment on two-stage temperature refrigerator using auto-cascade refrigeration cycle

作　　者：晏刚[1] 王维[1] 钱文波[1] 冯永斌[1] 张敏[1] 

机构地区：[1]西安交通大学

出　　处：《制冷与空调》2008年第B06期70-74,共5页Refrigeration and Air-Conditioning

摘　　要：由于不同储物的储存温度和湿度的要求不同,需要冰箱提供不同的间室温度来满足储存要求。采用非共沸混合制冷剂的自复叠制冷循环应用于双温冰箱系统,通过理论计算分析采用混合制冷剂R600a/ R32和R600/R125时的系统性能,发现采用R600a/R32时在压力比、压缩机单位容积制冷量和COP方面均有一定优势。并且按照质量分数70%/30%充注R600a和R32进行实验时,成功获得稳定的两级蒸发温度-28.7℃/-52.0℃,证明自复叠双温冰箱的可行性。Investigates the two stage temperature refrigerator using auto-cascade refrigeration （ACR） cycle and non azeotropic mixture refrigerants. Analyzes the performance of the system using R600a/R32 and R600/R125 as mixture refrigerants. The results show that the system＇s performance using R600a/R32 is superior to the other on pressure ratio, unit volume refrigerating capacity of compressor and COP. In the experiment, the system using mixture refrigerants R600a/R32 （70%/30% as mass ratio） can provide steady two stage evaporation temperature - 28.7 ℃ and - 52. 0℃ , which proves the feasibility of two-stage temperature refrigerator using auto cascade refrigeration cycle.

关 键 词：自复叠制冷循环 双温冰箱 混合工质 

分 类 号：TB65[一般工业技术—制冷工程]