-150℃四级自复叠制冷系统的实验与分析  

Experimental study and analysis of four-stage auto-cascade refrigeration system at-150℃

作　　者：徐琳娇 张华[1] 肖丽媛 王国栋[1] XU Linjiao;ZHANG Hua;XIAO Liyuan;WANG Guodong(School of Energy and Power Engineering,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：《能源研究与信息》2021年第3期141-146,共6页Energy Research and Information

摘　　要：搭建了一种四级自复叠制冷系统,采用由R600a、R134a、R23、R14、R50和R740等6种工质组成的非共沸混合制冷剂,经过调试与实验,成功得到了-150℃的柜内温度。讨论了该低温箱体的降温特性、压缩机的运行特性和混合工质的节流特性。研究表明,压缩机的吸、排气压力和温度关乎系统能否安全稳定的运行,每级毛细管的长度关乎系统的降温特性。A four-stage auto-cascade refrigeration system was built using a non-azeotropic refrigerant composed of six refrigerants such as R600 a,R134 a,R23,R14,R50 and R740.After debugging and testing,cabinet temperature of-150℃was successfully obtained.The cooling characteristics of low temperature box,the operation performance of the compressor,and the throttling characteristics of the mixed refrigerants were also discussed.The results show that the suction and discharge pressure and temperature of the compressor are related to the safe and stable operation of the system,and the length of capillary of each stage is related to the cooling characteristics of the system.

关 键 词：四级自复叠制冷系统 混合工质 分级冷凝 特性研究 

分 类 号：TB663[一般工业技术—制冷工程]