超低温保存箱复叠式制冷循环特性分析  

Analysis of cycling performance of cascade refrigeration system in ultra low temperature freezer

作　　者：赵之贵[1] 孙志高[1] 王功亮[1] 焦丽君[1] 

机构地区：[1]苏州科技学院环境科学与工程学院,江苏苏州215009

出　　处：《苏州科技学院学报（工程技术版）》2013年第3期17-20,共4页Journal of Suzhou University of Science and Technology （Engineering and Technology）

基　　金：苏州市科技计划项目(SYG201042)

摘　　要：在理论分析和计算的基础上,选择R404A/R508作为复叠制冷循环的制冷剂工质对,通过分析复叠式制冷系统的高、低温级制冷循环性能系数(COP)与各自的蒸发温度、冷凝温度之间的关系,在整机COP最大化和高、低温级压缩比相等的原则下,确定了复叠式制冷系统最佳中间温度以及系统工作的状态点。Cascade refrigeration system is discussed in this work. R404A/R508 is chosen as refrigerant by theoretical analysis and calculation. The relationship of the high and low temperature stage＇s COP and their evaporation temperature and condensation temperature is analyzed. The best intermediate temperature and each state point of the cascade refrigeration system are determined, based on the principles that COP of the whole cascade refrigeration system is maximized and the compressure ratio of high and low temperature stage cycle is equal.

关 键 词：复叠式制冷 制冷剂 状态点 超低温保存箱 

分 类 号：TB6[一般工业技术—制冷工程]