Local effects of longitudinal heat conduction in plate heat exchangers

被引：20

作者：

Ciofalo, Michele ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Ingn Nucl, I-90128 Palermo, Italy

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 15-16期

关键词：

longitudinal heat conduction; conjugate heat transfer; plate heat exchangers; LAMINAR FORCED-CONVECTION; CORRUGATED PASSAGES; AXIAL CONDUCTION; MICRO-CHANNELS; FLOW; SINGLE;

D O I：

10.1016/j.ijheatmasstransfer.2006.12.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In a plate heat exchanger, heat transfer from the hot to the cold fluid is a multi-dimensional conjugate problem, in which longitudinal heat conduction (LHC) along the dividing walls often plays some role and can not be neglected. Large-scale, or end-to-end, LHC is always detrimental to the exchanger's effectiveness. On the contrary, if significant non-uniformities exist in the distribution of either convective heat transfer coefficient, small-scale, or local, LHC may actually enhance the exchanger's performance by improving the thermal coupling between high heat transfer spots located on the opposite sides of the dividing wall. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3019 / 3025

页数：7

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