Improvement of heat transfer with perforated circular holes in finned tubes of air-cooled heat exchanger

被引：42

作者：

Lee, Dong H. ^{[2
]}

Jung, Jin M. ^{[1
]}

Ha, Jong H. ^{[3
]}

Cho, Young I. ^{[1
]}

机构：

[1] Drexel Univ, Dept Mech Engn & Mech, Philadelphia, PA 19104 USA

[2] Chonbuk Natl Univ, Coll Engn, Dept Mech Design Engn, Jeonju, Jeonbuk, South Korea

[3] Korea Heat Exchanger Co Ltd, Gunsan, Jeonbuk, South Korea

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2012年 / 39卷 / 02期

关键词：

Heat exchanger; Finned tube; Perforation; Circular fin; SIDE PERFORMANCE; FLOW; TURBULENT; WINGLETS; PIPE;

D O I：

10.1016/j.icheatmasstransfer.2011.11.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present study investigated the effect of perforated circular finned-tube (PCFT) on the convective heat transfer performance of circular finned-tube heat exchangers. The air-side convective heat transfer coefficients increased by 3.55% and 3.31% for 2-hole and 4-hole PCFT cases, respectively. The increase in the convective heat transfer coefficient was related to the reduction of the recirculation region by introducing the perforations at the flow-separation locations on the finned tube. The pressure drop across the finned-tube bundles increased by 0.68% and 2.08% for the 2-hole PCFT and 4-hole PCFT cases, respectively. The greater pressure drop in the case of the 4-hole PCFT might be due to excessive flow disturbances produced by multiple perforations. The fin factor defined as the ratio of the % increase of the convective heat transfer coefficient and that of the pressure drop was 5.19 for the 2-hole PCFT case, whereas that was 1.59 for the 4-hole PCFT case. (C) 2011 Elsevier Ltd. All rights reserved.

引用

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页码：161 / 166

页数：6

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