Experimental investigation of header configuration improvement in plate-fin heat exchanger

被引：46

作者：

Wen, Jian ^{[1
]}

Li, Yanzhong ^{[1
]}

Wang, Simin ^{[1
]}

Zhou, Aimin ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Dept Refrigerat & Cryogen Engn, Xian 710049, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2007年 / 27卷 / 11-12期

关键词：

plate-fin heat exchanger; PIV; optimum design; FLOW; MALDISTRIBUTION; CONDUCTION;

D O I：

10.1016/j.applthermaleng.2007.01.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Flow characteristics in the header of a plate-fin heat exchanger have been investigated by means of Particle Image Velocimetry (PIV). A series of velocity vector and streamline graphs of different cross-sections are obtained in the experiment. The experimental results indicate that performance of fluid maldistribution in a conventional header is very serious, while the improved header configuration with a punched baffle can effectively enhance the uniformity of flow distribution. The flow maldistribution parameter and the ratio of the maximum velocity to the minimum in a plate-fin heat exchanger decreases by installing the punched baffle. Further heat exchange experiments indicate that the temperature is distributed more uniformly in the improved heat exchanger core and the heat exchanger effectiveness can be effectively enhanced. The conclusion of this paper is of great significance in the optimum design of plate-fin heat exchanger. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1761 / 1770

页数：10

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