自复叠制冷循环双温冰箱设计的理论研究  

Theoretical Study on Design of Two-Stage Temperature Refrigerator Using Auto-Cascade Refrigeration Cycle

作　　者：晏刚[1] 颜俊[1] 王维[1] 钱伟[1] 任挪颖[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2008年第5期551-555,共5页Journal of Xi'an Jiaotong University

摘　　要：为了给冰箱提供不同的间室温度来满足储存要求,将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,研究了两间室蒸发器出口温度、冷凝器出口温度、冷藏室与冷冻室制冷量比例及冷凝蒸发器高压侧出口过冷度的变化对冰箱系统优化设计的影响.结果表明:系统性能系数随着冷藏室和冷冻室蒸发器出口温度的降低、冷凝器出口温度的升高而减小;提高两间室制冷量的比例可增大性能系数,但压缩机耗功和压力比也同时增大;增大冷凝蒸发器高压端出口侧制冷剂的过冷度可以减小压缩机耗功,提高系统性能系数.研究结果对于自复叠双温冰箱的实际推广提供了参考.A two-stage temperature refrigerator using auto-cascade refrigeration cycle and nonazeotropic mixture refrigerant was proposed. The system parameters including the outlet temperatures of the evaporators and the condenser, the refrigerating capacity ratio of the two compartments and the subcooling degree at outlet of the evaporative condenser were analyzed to optimize the design of the refrigerator. The results show that as the outlet temperatures of the fridge evaporator and the freezer evaporator decrease, or the condensation temperature increases, the coefficient of performance （CCOP） decreases. Moreover, increasing the refrigerating capacity ratio can improve the system Ccop but the compressor power consumption and the pressure ratio increases. In addition, as the subcooling degree at the high-pressure outlet of the evaporative condenser increases, the compressor power decreases and the system CCOP rises.

关 键 词：自复叠制冷循环 双温冰箱 混合制冷剂 

分 类 号：TB657.4[一般工业技术—制冷工程]