Numerical assessment of Ag-water nano-fluid flow in two new microchannel heatsinks: Thermal performance and thermodynamic considerations

被引：75
作者：
Yang, Liu [1 ,2 ,3 ,4 ]
Huang, Jia-nan [1 ,2 ]
Mao, Mao [1 ,2 ]
Ji, Weikai [1 ,2 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Jiangsu Prov Key Lab Solar Energy Sci & Technol, Nanjing 210096, Peoples R China
[2] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Peoples R China
[3] Minist Educ, Engn Res Ctr Bldg Equipment Energy & Environm, Nanjing 210096, Peoples R China
[4] Southeast Univ, Shenzhen Res Inst, Shenzhen 518000, Peoples R China
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2020年 / 110卷
基金：
中国国家自然科学基金;
关键词：
Ag-water nano-fluid; Heatsink; CPU cooling; Irreversibility; BOILING HEAT-TRANSFER; ENTROPY GENERATION; NANOFLUID FLOW; SINK; OPTIMIZATION; MINIMIZATION; EXCHANGER; CONDUCTIVITY; ALGORITHM; DESIGNS;
D O I：
10.1016/j.icheatmasstransfer.2019.104415
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The present paper is devoted to the first and second law analysis of a aqueous nano-fluid (NF) containing suspended Ag nanoadditives in two new microchannel heatsinks. The influences of nanoadditives volume fraction (phi) and Reynolds number (Re) on performance indicators based on the first and second law of thermodynamics are taken into account and analyzed. The outcomes reveal that the augmentation of Re and phi causes an intensification in the convective heat exchange coefficient and a decrease in the CPU temperature, thermal irreversibility rate and enhance the CPU temperature uniformity. However, grow of Re intensifies both the pumping power and irreversibility due to flow friction. Additionally, the outcomes depicted the superior performance of NF compared to the base fluid. Moreover, the irreversibility inside the studied heatsinks is mainly due to the heat transfer compared to the flow friction. Finally, the results demonstrate that the heatsink with more path changes is more efficient form the viewpoint of the first and second laws of thermodynamics.
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页数：13
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