工况对R22及替代工质有效过热循环性能的影响  

Influence of Operating Condition on Effective Superheat Cycle Performance of R22 and Its Alternative Working Substances

作　　者：郭航[1] 杜海燕[1] 李恒[1] 赵鹏[1] 刘佳[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100022

出　　处：《北京工业大学学报》2008年第9期986-989,共4页Journal of Beijing University of Technology

基　　金：北京市属市管高等学校人才强教计划资助项目

摘　　要：为解决R22替代过程中制冷系统回热器的再设计问题,以热力学计算分析的方法对运行工况参数对R22及其7种替代制冷剂的有效过热循环性能的影响进行了研究.结果表明,决定有效过热对制冷循环的性能是否有利的因素除了工质种类外。还有运行工况参数;有效过热对R22、R152a和R410A的制冷循环性能的影响是否有利取决于具体工况;有效过热对R407C、R134a、R290和R507的制冷循环性能的影响总是有利的,而对R717的制冷循环的性能总有负面影响.For the purpose of redesigning of superheater in refrigeration system during R22 phase-out, the effect of operating parameters on effective superheat performance of R22 and its seven alternative refrigerants have been studied by thermodynamic calculation and analysis. The results showed that the influencing factors of performance contrast between effective superheat refrigeration cycles and ideal refrigeration cycles include not only refrigerant species, but also parameters of operating condition of cycle. For R22, R152a and R410A, the performance contrast between cycles with or without effective superheat is strongly depending on operating conditions. R290, R134a, R407C and R507 always benefit from effective superheat in regard to refrigerating capacity per unit swept volume. The effective superheat has negative influence on cycle performance of R717 under all calculated conditions.

关 键 词：过热器 制冷量 制冷剂 运行工况 

分 类 号：TB615[一般工业技术—制冷工程]