Purpose

The purpose of this study is to conduct research on a new kind of division microchannel heat sink (D-MCHS), which can distribute cooling water along the channel-length direction. First, the pressure drops in the D-MCHS with different division region numbers were compared. Then, the cooling performance of the D-MCHS with different division region numbers was also comparatively investigated. Finally, the temperature distribution on the bottom surface of the D-MCHS was analyzed.

Design/methodology/approach

First, experiments were conducted to investigate the numerical calculation method. Then, a three-dimensional steady, single-phase, laminar flow and solid-fluid conjugate heat transfer numerical model was used to research the flow and heat transfer characteristics in microchannels.

Findings

The pressure drop in the D-MCHS could be reduced by increasing the number of divided flow regions along the channel-length direction. The bottom average temperature of the D-MCHS could be simultaneously affected by the number of divided flow regions and the water flow rate. The thermal uniformity performance of the D-MCHS could be improved by increasing the number of division flow regions. The number of low-temperature and high-temperature areas on the bottom surface of the D-MCHS is corresponding to the division flow region number.

Originality/value

The D-MCHS exhibited a positive effect on the pressure drop decrease and thermal uniformity improvement. It not only keeps the electronic module working in a secure temperature environment but also consumes less pump power for a lower pressure drop.

中文翻译：

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沿通道长度的流体分布对微通道散热器冷却性能的影响

目的

本研究的目的是研究一种新型的分割微通道散热器（D-MCHS），它可以沿通道长度方向分配冷却水。首先，比较了不同分区数的 D-MCHS 中的压降。然后，还比较研究了具有不同分区数的D-MCHS的冷却性能。最后，分析了 D-MCHS 底面的温度分布。

设计/方法/途径

首先，进行了实验来研究数值计算方法。然后，利用三维稳态、单相、层流和固-液共轭传热数值模型研究微通道内的流动和传热特性。

发现

D-MCHS 中的压降可以通过增加沿通道长度方向划分的流动区域的数量来减少。D-MCHS 的底部平均温度可以同时受到划分流动区域的数量和水流量的影响。D-MCHS 的热均匀性性能可以通过增加分流区域的数量来提高。D-MCHS底面低温区和高温区的数量与分流区数量相对应。

原创性/价值

D-MCHS 在降低压降和提高热均匀性方面表现出积极作用。它不仅使电子模块在安全的温度环境中工作，而且消耗更少的泵功率以降低压降。