INVESTIGATION ON CONDENSATION HEAT TRANSFER FOR R404A INSIDE MICROFIN TUBE

摘要：

Considering R404A as a pure and mixture refrigerant respectively, the condensation heat transfer coefficients inside 9.52 mm o.d. microfin tube were predicted by Cavallini correlations for pure and mixture refrigerant. The difference between these two values increases with vapor quality and the maximum difference is less than 4％. It shows that R404A can be treated as pure refrigerant when calculating its in-tube condensation heat transfer coefficients. Cavallini, Yu-Koyama and Kaushink-Azer correlations were analyzed and applied to predict condensation heat transfer coefficient for R404A. Compared with the experimental data, Cavallini correlation illustrated the highest accuracy in predicting condensation heat transfer coefficients for R404A inside microfin tube.

关键词： zeotropic mixtures microfin tube R404A correlation condensation heat transfer coefficient

作者: Xiaohong NAN Xinlan LUO

作者单位: Xi’an University of Architecture and Technology Xi’an University of Architecture and Technology;Shanxi Reaserch Insitiute of Architectural Design CO

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）