Cooling of microchannel heat sinks with gaseous coolants

被引：5

作者：

Adham, Ahmed Mohammed ^{[1
]}

Mohd-Ghazali, Normah ^{[1
]}

Ahmad, Robiah ^{[2
]}

机构：

[1] Univ Teknol Malaysia, Fac Mech Engn, Johor Baharu 81310, Skudai, Malaysia

[2] Univ Teknol Malaysia, Razak Sch Engn & Adv Technol, Kuala Lumpur 54100, Malaysia

来源：

5TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING | 2013年 / 56卷

关键词：

Microcahnnel; gaseous coolants; thermal resistance; optimization; FLOW;

D O I：

10.1016/j.proeng.2013.03.128

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, the optimization of the cooling performance of a rectangular microchannel heat sink is investigated with four different gaseous coolants; air, ammonia gas, dichlorodifluoromethane (R-12) and chlorofluoromethane (R-22). A systematic robust thermal resistance model together with a methodical pumping power calculation is used to formulate the objective functions, the thermal resistance and pumping power. The non-dominated sorting genetic algorithm (NSGA-II), a multi-objective algorithm, is applied in the optimization procedure. The optimized thermal resistances obtained are 0.178, 0.14, 0.08 and 0.133 degrees K/W for the pumping powers of 6.4, 4, 22.4 and 16.5 W for air, ammonia gas. R-12 and R-22, respectively. These results show that among all the gaseous coolants investigated in the current study, ammonia gas exhibited balanced thermal and hydrodynamic performances. Due to the Montreal Protocol, the coolant R-12 is no longer produced while R-22 will eventually be phased out. The results from ammonia provide a strong motivation to conduct more investigations on the potential usage of this gaseous coolant in the electronic cooling industry. (C) 2013 The Authors. Published by Elsevier Ltd.

引用

页码：337 / 343

页数：7

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