化工进展2017，Vol.36Issue(2)：481-486,6.DOI:10.16085/j.issn.1000-6613.2017.02.011
R410A、R404A、R407C在水平强化换热管外的凝结换热
Experimental study of condensation heat transfer performance of R410A, R404A and R407C on horizontal enhanced tubes
欧阳新萍 1舒涛 1刘冰翛1
作者信息
- 1. 上海理工大学能源与动力工程学院，上海 200093
- 折叠
摘要
Abstract
The performance of condensation heat transfer of R410A、R407C and R404A were experimentally studied and compared to horizontal tubes. The enhanced tubes in this study have three dimensional inner screw and outer diagonal fins. The Wilson plot method was used to treat experimental data and obtain the coefficient of convective heat transfer in tubes and convective heat transfer correlation in the form of Dittus-Boelter. Then the condensation heat transfer coefficient on tubes can be figured out on the basis of separation of thermal resistance. The results showed that under the same conditions,the condensation heat transfer coefficient is the sequence of R410A>R404A > R407C. The outer enhancement factor of these three refrigerants is 9.53—14.07、6.81—11.48 and 3.23—5.28. The enhancement ratio of R410A、R404A and R407C is 1.77,1.73,1.76. The condensation heat transfer coefficient of R410A decreased with the increasing degree of super-cooling,the same as the condensation characteristics of the single refrigerant. However,as the increasing degree of super-cooling,the condensation heat transfer coefficients of 404A and R407C increase. The reason is that a layer of vapor film forms in the condensation process of the non-azeotropic,which increased the heat transfer resistance.关键词
凝结换热/强化换热/混合制冷剂/强化管Key words
condensation heat transfer/heat transfer enhancement/mixed refrigerant/enhanced tube分类
能源科技引用本文复制引用
欧阳新萍,舒涛,刘冰翛..R410A、R404A、R407C在水平强化换热管外的凝结换热[J].化工进展,2017,36(2):481-486,6.
