Experimental study of condensation heat transfer of R-134a flow in corrugated tubes with different inclinations

被引：40

作者：

Khoeini, D. ^{[2
]}

Akhavan-Behabadi, M. A. ^{[1
]}

Saboonchi, A. ^{[2
]}

机构：

[1] Univ Tehran, Sch Mech Engn, Coll Engn, Tehran, Iran

[2] Isfahan Univ Technol, Dept Mech Engn, Esfahan, Iran

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2012年 / 39卷 / 01期

关键词：

Heat transfer; Vapor condensation; Corrugated tube; Tube inclination;

D O I：

10.1016/j.icheatmasstransfer.2011.09.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This experimental study is performed to investigate condensation heat transfer coefficient of R-134a flow inside corrugated tube with different inclinations. Different inclinations of test condenser ranging from -90 degrees to +90 degrees and various flow mass velocities in the range of 87 to 253 [kg/m(2)s] are considered in this study. Data analysis showed that change in the tube inclination had a significant effect on condensation heat transfer behavior. At low mass velocities, and low vapor qualities, the highest condensation heat transfer coefficient was obtained for alpha = +30 degrees which was 1.41 times greater than the least one obtained for alpha = -90 degrees. The results also showed that at all mass velocities, the highest average heat transfer coefficients were achieved for alpha = +30 degrees. Based on the experimental results, a new empirical correlation is proposed to predict the condensation heat transfer coefficient of R134a flow in corrugated tubes with different inclinations. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：138 / 143

页数：6

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