两级自复叠制冷系统的实验研究  

Experimental Research on Two Stage Auto Cascade Refrigeration System

作　　者：朱珠 Zhu Zhu(Nanjing Normal University,Zhongbei college,Zhenjiang 212000,China)

机构地区：[1]南京师范大学中北学院,江苏镇江212000

出　　处：《科学技术创新》2022年第3期164-167,共4页Scientific and Technological Innovation

摘　　要：本文搭建一台两级自动复叠的制冷系统进行实验研究,通过平面压焓图变化关系分析机组降温、运行特性和得出机组的最佳运行工况。实验结果表明:系统制冷量随着冷凝温度的降低而增加,最佳工况:冷凝温度为10℃、制冷量为428W,COP为0.132,此时混合制冷剂R14/R23/R227的质量比为:30/55/15。In this paper,a two-stage automatic cascade refrigeration system is built for experimental research.Through the change relationship of plane pressure enthalpy diagram,the cooling characteristics and operation of the unit are analyzed,and the optimal operation condition of the unit is obtained.The experimental results show that the refrigerating capacity of the unit decreases with the decrease of ambient temperature.The optimal working condition is that the condensation temperature is 10℃,the refrigerating capacity is 428w and the cop is 0.132.At this time,the mass ratio of mixed refrigerant R14/R23/R227 is 30/55/15.

关 键 词：自动复叠制冷 混合工质 COP 

分 类 号：TB61[一般工业技术—制冷工程]