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Enhanced Boiling Heat Transfer by Using Micro-Pin-Finned Surface in Three Different Test Systems

机译：在三种不同的测试系统中使用微针鳍表面增强沸腾传热

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摘要

For efficiently cooling electronic components, experiments were conducted to study heat transfer performance of FC-72 over a silicon chip with micro-pin-fins in three different test systems including pool boiling, natural circulation flow boiling, and forced flow boiling. A smooth chip (chip S) and a micro-pin-finned chip having fin thickness of 30 μm and fin height of 60 μm (chip PF30-60) were tested. The micro-pin-fins were fabricated on the surface of square silicon chip (10 × 10 × 0.5 mm~3) by use of dry etching technique for enhancing boiling heat transfer. The experiments were conducted at fluid velocities of 0.5 and 1 m/s for the forced flow boiling and the liquid subcoolings of 25 and 35 Kfor all three test systems. With regard to the three test systems, the micro-pin-finned surface shows a considerable heat transfer enhancement compared to the smooth surface and shows a sharp increase in the critical heat flux (CHF). For the same chip, the boiling curves are almost the same for the pool boiling and the natural circulation flow boiling, while the boiling curves shift toward a smaller wall superheat for the forced flow boiling. The critical heat flux was the highest for the forced flow boiling at a fluid velocity of 1 m/s.
机译：为了有效地冷却电子组件，在包括池沸腾，自然循环流沸腾和强制流沸腾在内的三种不同测试系统中，进行了实验以研究FC-72在带有微针鳍的硅芯片上的传热性能。测试了平滑的芯片（芯片S）和鳍厚度为30μm，鳍高度为60μm的微针鳍芯片（芯片PF30-60）。利用干法刻蚀技术，在方形硅芯片（10×10×0.5mm〜3）的表面上制成微针状鳍片，以增强沸腾传热。对于所有三个测试系统，在强制流动沸腾的流体速度分别为0.5和1 m / s的情况下进行实验，在25和35 K的液体过冷条件下，以流体速度进行了试验。关于这三个测试系统，与光滑表面相比，微针状翅片表面显示出显着的传热增强，并且临界热通量（CHF）急剧增加。对于同一芯片，池沸腾和自然循环流沸腾的沸腾曲线几乎相同，而强制流沸腾的沸腾曲线则向较小的壁过热方向移动。对于在1 m / s的流体速度下强制流沸腾，临界热通量最高。

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  • 来源
    《Heat Transfer Engineering》 |2011年第12期|p.1062-1068|共7页
  • 作者

    YANFANG XUE; MINZHE YUAN; AIXIANG MA; JINJIA WEI;

  • 作者单位

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

  • 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);
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  • 正文语种 eng
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