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The heat transfer characteristics of liquid cooling heatsink containing microchannels

机译:含微通道的液体冷却散热器的传热特性

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This paper numerically and experimentally investigates the heat transfer performance and characteristics of liquid cooling heatsink containing microchannels. The effects of channel geometry and pressure drop between the entrance and exit of heatsink on the heat transfer performance are studied. The geometrical parameters include aspect ratio and cross-sectional porosity of the channels. The height of the micro-channels is considered constant. The aspect ratio is set from 1.67 to 14.29 and the porosity is from 25% to 85%. The imposed pressure drop ranges between 490 and 2940 Pa. It is found that the aspect ratio corresponding to the lowest effective thermal resistance is changed with respect to the pressure drop. It is also noticed that the value of effective thermal resistance is almost a constant for cross-sectional porosity in the range of 53%-75%. The effective thermal resistance is increased when cross-sectional porosity is deviated from this range. In addition, the increasing of pressure drop enhances heat transfer performance for channels of high aspect ratio more than those of low aspect ratio.
机译:本文通过数值和实验研究了含微通道的液体冷却散热器的传热性能和特性。研究了通道几何形状和散热器入口和出口之间的压降对传热性能的影响。几何参数包括通道的纵横比和横截面孔隙率。微通道的高度被认为是恒定的。长宽比设置为1.67至14.29,孔隙度为25%至85%。施加的压降在490Pa和2940Pa之间。发现对应于最低有效热阻的纵横比相对于压降而改变。还注意到,对于横截面孔隙率,有效热阻值几乎是恒定的,在53%-75%的范围内。当横截面孔隙率偏离该范围时,有效热阻会增加。另外,压降的增加对于高纵横比的通道比低纵横比的通道更增强了传热性能。

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