Heat Transfer Performance of LCS Porous Copper with Different Structural Characteristics
Heat Transfer Performance of LCS Porous Copper with Different Structural Characteristics
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DOI：
10.4028/www.scientific.net/msf.933.380
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发表时间：
2018-10
期刊：
影响因子：
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通讯作者：
K. Diao;Xianke Lu;Z. Wu;Yuyuan Zhao
中科院分区：
文献类型：
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作者：
K. Diao;Xianke Lu;Z. Wu;Yuyuan Zhao
多孔金属是主动冷却和热管理的高效介质。然而，工作液需要高泵浦功率才能流过多孔金属。研究了碳酸盐烧结法(LCS)制备的多孔铜的结构特征(孔隙率、孔径和铜粉粒度)对其传热性能的影响。在一维水强迫对流条件下，测量了孔隙率为0.48~0.78、孔径为2 5 0~15 0 0μm、铜粉粒径为75~84 1μm的多孔铜样品的换热系数和压降。对于不同孔径和铜粉粒度的样品，孔隙率在0.6~0.7之间时换热系数最大，压降随孔隙率的增大而减小。孔径对换热系数的影响不明显，压降随孔径的减小而减小。铜颗粒较大(841μm)的样品具有较高的最佳换热系数和较低的压降。表征整体换热性能的性能系数(COP)随孔隙率的增大、孔径的减小和铜粉粒度的增大而增大。
Porous metals are highly efficient media for active cooling and thermal management. However, the working fluid requires high pumping power to flow through the porous metals. This paper investigated the effect of structural characteristics (porosity, pore size and Cu particle size) on the heat transfer performance of porous Cu manufactured by Lost Carbonate Sintering (LCS). The heat transfer coefficient and pressure drop of porous Cu samples with porosity from 0.48 to 0.78, pore size from 250-1500 μm and Cu particle size from 75 to 841 μm were measured under the one-dimensional forced convection condition using water. For all the samples with different pore sizes and Cu particle sizes, the optimum heat transfer coefficient was observed at a porosity between 0.6 and 0.7 and the pressure drop decreased with increasing porosity. The effect of pore size on heat transfer coefficient was not pronounced while pressure drop decreased with decreasing pore size. Samples with large Cu particles (841 μm) had higher optimum heat transfer coefficients and lower pressure drops. The coefficient of performance (CoP), which can be used to describe the overall heat transfer performance, increased with increasing porosity, decreasing pore size and increasing Cu particle size.