Heat transfer performance of lotus-type porous copper heat sink with liquid GaInSn coolant
Heat transfer performance of lotus-type porous copper heat sink with liquid GaInSn coolant
复制标题
液态GaInSn冷却剂莲花型多孔铜散热器的传热性能
DOI：
10.1016/j.ijheatmasstransfer.2014.09.058
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发表时间：
2015-01-01
影响因子：
5.2
通讯作者：
Li, Y. X.
中科院分区：
文献类型：
--
作者：
Liu, Y.;Chen, H. F.;Li, Y. X.
荷叶型多孔铜是一种单向排列的长圆柱形孔（通道）的新型微通道结构。它可以作为散热片用于高功率电子元件的冷却。通过实验和Fluent-3D数值模拟，系统研究了含液态GaInSn冷却剂的荷叶型多孔铜散热器在不同结构参数和流体动力参数条件下的传热性能。实验结果表明，该散热器在低至17.5 kPa的固定压降下，传热系数可达9.6 W/cm(2) K。模拟结果表明，存在最佳的孔隙率和孔径，使散热器的等效换热系数达到最大。对于GaInSn冷却剂，最佳孔隙率和孔径分别为45 ~ 55%和0.7 ~ 0.9 mm。而在相同压降条件下，水冷剂的最佳孔径较小（0.1 ~ 0.2 mm），且最佳孔径与GaInSn冷却剂相同。总体而言，模拟的传热系数和结构参数窗口与实验结果吻合较好。(C) 2014 Elsevier Ltd.版权所有。
Lotus-type porous copper is a new kind of micro-channel structure with long cylindrical pores (channels) aligned in one direction. It can be used as a heat sink for cooling of high-power electronic components. Through experiments and Fluent-3D numerical simulations, the heat transfer performance of a lotus-type porous copper heat sink with a liquid GaInSn coolant was systematically studied under different structural and hydrodynamic parameters conditions. The experimental results showed that this kind of heat sink has an excellent heat transfer coefficient, as high as 9.6 W/cm(2) K, only under a fixed pressure drop as low as 17.5 kPa. The simulation showed that optimal porosity and pore diameter existed for the heat sink to conduct a maximal equivalent heat transfer coefficient. For the GaInSn coolant, the optimal porosity and pore diameter were about 45-55% and 0.7-0.9 mm, respectively. However, at the same pressure drop conditions the optimal pore diameter for the water coolant was smaller (0.1-0.2 mm) and the optimal porosity was the same as that for the GaInSn coolant. Overall, the simulated heat transfer coefficients and structural parameters window agreed well with the experimental results. (C) 2014 Elsevier Ltd. All rights reserved.