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Parametric study on the performance of double-layered microchannels heat sink

机译：双层微通道散热器性能的参数研究

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摘要

MicroChannel is one of several high-heat-flux removal techniques being used in electronic cooling. Double-layered microchannel heat sink (DL-MCHS) with counter current flow arrangement is found not only to be able to lower the thermal resistance of the heat sink, but also decrease the maximum temperature and streamwise temperature rise on the base surface compared with single-layered microchannel heat sink (SL-MCHS). The present paper numerically investigated the thermal resistance, pumping power and temperature distribution on the base surface of substrate of DL-MCHS in different microchannel parameters and flow conditions, so as to find the complicated relationship between the overall performance of DL-MCHS and its geometric parameters and flow conditions. The numerical results show that the optimal width ratio of DL-MCHS should be increased when the microchannel aspect ratio is increased. The effectiveness of increasing aspect ratio of microchannels on improving the overall performance of DL-MCHS is dependent on the pumping power provided. DL-MCHS with higher aspect ratio and smaller width ratio is suited to the situation when higher pumping power is provided. Compared with the situation with identical inlet velocity being assigned to the bottom and upper microchannels, adjusting the inlet velocity of upper channels to be smaller than that of bottom channels may result in the improvement of the overall performance of DL-MCHS at a given pumping power, especially when the given pumping power is lower. These strategies could be tried in the real application of DL-MCHS.
机译：MicroChannel是电子冷却中使用的几种高热通量去除技术之一。与单流相比，具有逆流布置的双层微通道散热器（DL-MCHS）不仅能够降低散热器的热阻，而且还能降低基体表面的最高温度和沿流方向的温度上升层微通道散热器（SL-MCHS）。本文在不同的微通道参数和流动条件下，对DL-MCHS基体的热阻，泵浦功率和温度分布进行了数值研究，以发现DL-MCHS的整体性能与其几何形状之间的复杂关系。参数和流动条件。数值结果表明，当增加微通道的长宽比时，应增加DL-MCHS的最佳宽度比。增加微通道的纵横比对改善DL-MCHS的整体性能的有效性取决于所提供的泵浦功率。具有高纵横比和较小宽度比的DL-MCHS适用于提供较高泵浦功率的情况。与将相同的入口速度分配给底部和上部微通道的情况相比，在给定的泵浦功率下，将上部通道的入口速度调整为小于底部通道的入口速度可能会导致DL-MCHS的整体性能得到改善，尤其是在给定的抽运功率较低时。这些策略可以在DL-MCHS的实际应用中进行尝试。

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  • 来源
    《Energy Conversion & Management》 |2014年第4期|550-560|共11页
  • 作者

    J.M. Wu; J.Y. Zhao; K.J. Tseng;

  • 作者单位

    EXQUISITUS, Centre for E-City, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore,State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an City, Shaanxi Province 710049, China,School of Aerospace, Xi'an Jiaotong University, Xi'an City, Shaanxi Province 710049, China;

    EXQUISITUS, Centre for E-City, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;

    EXQUISITUS, Centre for E-City, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Double-layered heat sink; Performance; Parametric study; Numerical simulation;

    机译：双层散热器;性能;参数研究;数值模拟;

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