R134a/R125混合工质管外沸腾换热特性研究  

Characteristic of boiling heat transfer of mixed refrigerant over horizontal tube

作　　者：张定才[1] 朱春洁[1] 张振[1] 杜佳迪[1] 

机构地区：[1]中原工学院能源与环境学院,郑州450007

出　　处：《低温与超导》2014年第7期54-59,共6页Cryogenics and Superconductivity

基　　金：河南省高等学校青年骨干教师资助计划(2011GGJS-114);河南省教育厅科技攻关计划项目(13B480297)资助

摘　　要：对水平管外纯R134a和三种不同浓度的R134a/R125混合工质池沸腾换热性能进行了试验研究。在试验研究的基础上对二元混合工质的沸腾换热进行理论分析,并提出了二元混合工质的沸腾换热预测关联式。在实验范围内,实验值与预测值的最大偏差不超过±20%,可以满足工程应用的需要。Pool boiling heat transfer of pure R134a and a binary R134a/R125 mixture with three different concentrations outside the horizontal tube was investigated experimentally. Theoretical analysis of binary mixed refrigerant boiling heat transfer was done based on the experimental study, and a correlation for predicting boiling heat transfer of binary mixed refrigerant was proposed. The maximum deviation of the experimental values and predicted values was less than ±20% in this paper, it could meet the need of engineering application.

关 键 词：混合工质 池沸腾R134a R125 传热系数预测 

分 类 号：TB64[一般工业技术—制冷工程]