Thermal characteristics of CPU cooling by using a novel porous heat sink and nanofluids

被引:37
作者
Neyestani, M. [1 ]
Nazari, M. [1 ]
Shahmardan, M. M. [1 ]
Sharifpur, M. [2 ]
Ashouri, M. [1 ]
Meyer, J. P. [2 ]
机构
[1] Shahrood Univ Technol, Fac Mech Engn, Shahrood, Iran
[2] Univ Pretoria, Dept Mech & Aeronaut Engn, Pretoria, South Africa
关键词
CPU cooling; Heat sink; Porous; Nanofluids; Al2O3; PERFORMANCE; WATER; CONVECTION; MODEL; FLOW; CONDUCTIVITY; SYSTEM; TUBE; JET;
D O I
10.1007/s10973-019-08256-y
中图分类号
O414.1 [热力学];
学科分类号
摘要
In this paper, different heat sinks are investigated to improve CPU cooling experimentally. Different types of copper heat sinks including a novel "porous heat sink'' are proposed and compared to obtain the optimum heat transfer rate. Water and Al2O3/water nanofluids (40 nm) in two different volume fractions (0.1 and 0.2 vol.% from 40-nm nanoparticles) are used as heat transfer fluid to cool the CPU. Different flow rates are also examined in the experimental study. The Nusselt number, wall temperature, thermal resistance and LMTD temperature have been analyzed for a wide range of parameters of the heat sinks. Also, the effect of geometry, heat transfer fluid, input power and flow rate on the heat transfer rate is reported. The result shows that the geometry of the heat sink has an important effect on the thermal performance of the system. The rate of heat transfer in the proposed novel porous heat sink is larger than the other cases. The Nusselt number in the porous heat sink by using nanofluids is 2.2 times larger than the heat sink with an inline pattern.
引用
收藏
页码:805 / 817
页数:13
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