Optimization of Microchannel Heat Sinks Using Entropy Generation Minimization Method

被引：51

作者：

Khan, Waqar Ahmed ^{[1
]}

Culham, J. Richard ^{[2
]}

Yovanovich, M. Michael ^{[2
]}

机构：

[1] Natl Univ Sci & Technol, PN Engn Coll, Dept Engn Sci, PNS Jauhar, Karachi 75350, Pakistan

[2] Univ Waterloo, Dept Mech Engn, Microelect Heat Transfer Lab, Waterloo, ON N2L 3G1, Canada

来源：

IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES | 2009年 / 32卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Analytical model; entropy generation minimization; microchannel heat sinks; optimization; SINGLE-PHASE FLOW; THERMAL PERFORMANCE; OPTIMAL-DESIGN; FABRICATION;

D O I：

10.1109/TCAPT.2009.2022586

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, an entropy generation minimization (EGM) procedure is employed to optimize the overall performance of microchannel heat sinks. This allows the combined effects of thermal resistance and pressure drop to be assessed simultaneously as the heat sink interacts with the surrounding flow field. New general expressions for the entropy generation rate are developed by considering an appropriate control volume and applying mass, energy, and entropy balances. The effect of channel aspect ratio, fin spacing ratio, heat sink material, Knudsen numbers, and accommodation coefficients on the entropy generation rate is investigated in the slip flow region. Analytical/empirical correlations are used for heat transfer and friction coefficients, where the characteristic length is used as the hydraulic diameter of the channel. A parametric study is also performed to show the effects of different design variables on the overall performance of microchannel heat sinks.

引用

页码：243 / 251

页数：9

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