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首页> 外文期刊>Heat Transfer Engineering >Flat and U-Shaped Heat Spreaders for High-Power Electronics
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Flat and U-Shaped Heat Spreaders for High-Power Electronics

机译：用于大功率电子产品的扁平和U形散热器

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摘要

To achieve a high heat-flux level and reduce manufacturing costs associated with conventional heat pipes, the concept of network heat spreaders employing a boiling heat-transfer mechanism in a narrow space had been proposed, and several flat-plate wickless heat spreaders had been designed and fabricated. The heat spreaders had been tested under different working conditions and orientations relative to gravity with very good results. The previously tested network heat spreaders, however, were based on plates with a relatively large size for general heat spreading purposes. In the present study, network heat spreaders with overall dimensions of 78 x 62 x 3.2 mm are designed and fabricated. Spreaders of this size are intended for use as heat sinks of high-power electronic components. External cooling fins are attached to enhance air-cooling heat transfer rate. The network heat spreaders are tested under various working conditions with water as the working fluid. The maximum heat input rate achieved is about 150 W with a corresponding heat flux of 60 W/cm~2. Compared to the performance of a solid copper plate having the same overall size as the spreader, the maximum temperature difference over the surface is reduced from about 32℃ to 3.3℃. The heat transfer performance of the spreader is also largely dependent on the filling ratio of the working fluid and the boiling heat transfer in the narrow space. For these reasons, boiling heat transfer mechanisms in a narrow space are analyzed, and a spreader design that would improve the performance in a horizontal position is described.
机译：为了实现高的热通量水平并降低与常规热管相关的制造成本，提出了在狭窄空间中采用沸腾传热机制的网络散热器的概念，并设计了几种平板型无芯散热器和捏造。在不同的工作条件和相对于重力的方向上对散热器进行了测试，结果非常好。但是，先前测试的网络散热器基于用于一般散热目的的相对较大尺寸的板。在本研究中，设计并制造了尺寸为78 x 62 x 3.2 mm的网络散热器。这种尺寸的散热器旨在用作大功率电子元件的散热器。附有外部散热片，以提高空气冷却的热传递率。网络散热器在各种工作条件下都以水作为工作流体进行了测试。达到的最大热输入速率约为150 W，相应的热通量为60 W / cm〜2。与具有与散布器相同的整体尺寸的固态铜板的性能相比，整个表面的最大温差从大约32℃降低到3.3℃。散流器的传热性能在很大程度上还取决于工作流体的填充率和狭窄空间中沸腾的传热。由于这些原因，分析了狭窄空间中的沸腾传热机理，并描述了一种可以改善水平位置性能的散热器设计。

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  • 来源
    《Heat Transfer Engineering》 |2003年第3期|p.57-65|共9页
  • 作者

    M. GAO; Y. CAO;

  • 作者单位

    Department of Mechanical Engineering, Florida International University, Miami, Florida, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工业用热工设备;
  • 关键词

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