Effect of Aspect Ratio of Flat Tube on R410A Evaporation Heat Transfer and Pressure Drop

被引：1

作者：

Kim, Nae Hyun ^{[1
]}

Lee, Eul Jong ^{[1
]}

Byun, Ho Won ^{[1
]}

机构：

[1] Univ Incheon, Dept Mech Syst Engn, Incheon, South Korea

来源：

TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B | 2013年 / 37卷 / 04期

关键词：

Evaporation; Heat Transfer; Pressure Drop; Aspect Ratio;

D O I：

10.3795/KSME-B.2013.37.4.395

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study, R-410A evaporation heat transfer tests were conducted in flattened tubes made from 5-mm round tubes. The test range covered a saturation temperature of 15 degrees C, heat flux of 5 similar to 15 kW/m(2)K, and mass flux of 200-400 kg/m(2)s. The results showed that both the condensation heat transfer coefficient and the pressure drop increased as the aspect ratio increased, with a pronounced increase for an aspect ratio of 4. A comparison of the flattened tube data with existing correlations revealed that the heat transfer coefficients were reasonably predicted by the Shah correlation, and the pressure drops were reasonably predicted by the Jung and Radermacher correlation.

引用

页码：395 / 404

页数：10

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