R_(11)/R_(113)非共沸混合工质竖管内膜状凝结换热的研究  

CONVECTIVE FILMW1SE CONDENSATION OF NONAZEOTRO-PIC BINARY FREON MIXTURES IN A VERTICAL TUBE

作　　者：魏保太 单国梁 刘靖[1] 

机构地区：[1]天津大学

出　　处：《工程热物理学报》1989年第1期55-58,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金

摘　　要：采用非共沸混合工质组成具有变温蒸发和冷凝过程热转换循环的热力学效果和节能潜力,已在能源界引起愈来愈大的兴趣。本文选择尚未研究过的R_(11)/R_(113)非共沸混合工质对竖管内全凝结换热过程进行了实验研究,通过微分方程组的无因次分析,导出了竖管内二元非共沸混合工质膜状凝结换热的特征量;对影响换热的因素和机理进行了分析探讨;提出了一个适用于各种组分R_(11)/R_(113)物系混合蒸汽凝结换热的通用准则方程。Complete condensation heat transfer of nonazeotropic binary mixtures R11/R113 inside a vertical tube has been investigated. A test system has been designed and installed, on which the change of vapor temperature, concentration and pressure along the condensation path can be measured. The theoretical model is proposed and dimensionless parameters are derived to correlate condensation heat transfer performance for the binary mixture. Based on a large amount of experiments, the generalized correlation which best fits the heat transfer data is:

关 键 词：混合工质 竖管 膜状 凝结 换热 

分 类 号：TK124[动力工程及工程热物理—工程热物理]