以分析法比较制冷工质的流动换热性能  

Comparison of the convective heat transfer performance of refri gerants by an exergy analysis method

作　　者：杨丽明[1] 

机构地区：[1]湛江海洋大学工程学院

出　　处：《华中科技大学学报（自然科学版）》2003年第6期63-65,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：湛江海洋大学工程热物理重点学科基金资助项目

摘　　要：借助于控制体热平衡和熵平衡导出换热过程火用损失率方程 ,利用换热过程的火用损失率方程得到了 3种天然制冷工质 (氨、二氧化碳、丙烷 )和常用卤代烃制冷工质在不同换热方式下的综合特性 ,并在相同换热模式下进行分析比较 .结果表明 ,上述几种天然工质 (尤其是氨 )其流动与传热的综合性能优于R2 2 ,R5 0The exergy loss rate equations were derived by the bala nces of heat and entropy in the control volume. The synthetic performance of sev eral natural refrigerants (ammonia, carbon dioxide, propane) and several halocar bon compounds refrigerants were discovered by the exergy loss rate equations und er the same heat transfer conditions. The results show that under same condition s the synthetic performance of the three natural refrigerants, especially ammoni a, is better than that of the common halocarbon compounds refrigerants.

关 键 词：对流换热 天然工质 Yong损失率 性能评价 

分 类 号：TK123[动力工程及工程热物理—工程热物理]