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首页> 外文期刊>Heat Transfer Engineering >Influence of Radial Thickness of Phase Change Material on Thermal Performance of Heat Pipe Receiver Under Microgravity
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Influence of Radial Thickness of Phase Change Material on Thermal Performance of Heat Pipe Receiver Under Microgravity

机译：相变材料的径向厚度对微重力下热管接收器热性能的影响

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摘要

In this article, a unit heat pipe receiver in an advanced solar dynamic system is numerically simulated. Accordingly, a mathematical model is set up, a numerical method is offered, and numerical results are compared with numerical results of the National Aeronautics and Space Administration (NASA). With both void cavity and phase change considered, influence of radial thickness of phase change material (PCM) on thermal performance of heat pipe receiver is numerically analyzed under microgravity. Numerical results indicate that decreasing the radial thickness of PCM in each canister has an effect of decreasing the thermal resistance of PCM. The variation of heat pipe temperature decreases as the thermal resistance between the heat pipe and the melt front decreases. The variation in heat pipe temperature is seen to be substantially reduced as the radial thickness of PCM is decreased to between 14.5 and 17 mm. Beyond this point, the impact of further reductions appears limited. The effect can be achieved with far fewer canisters with some degree of increasing thermal enhancement. When the radial thickness of PCM for unit heat pipe receiver is between 14.5 and 17 mm, the thermal performance of the heat pipe receiver is stable, and thermal spot during sunlight periods and thermal ratcheting during eclipse periods may be alleviated. The research results can be used to guide the designing and optimization of a PCM canister for a heat pipe receiver.
机译：在本文中，对高级太阳动力系统中的单元热管接收器进行了数值模拟。因此，建立了数学模型，提供了一种数值方法，并将数值结果与美国国家航空航天局（NASA）的数值结果进行了比较。同时考虑空隙和相变，在微重力作用下数值分析了相变材料的径向厚度对热管接收器热性能的影响。数值结果表明，减小每个碳罐中PCM的径向厚度具有减小PCM热阻的作用。随着热管和熔体前沿之间的热阻减小，热管温度的变化减小。当PCM的径向厚度减小到14.5和17mm之间时，可以看到热管温度的变化已大大减小。超出这一点，进一步减少的影响似乎是有限的。可以用少得多的碳罐实现某种程度的热增强。当单元热管接收器的PCM的径向厚度在14.5和17 mm之间时，热管接收器的热性能稳定，并且可以减轻日光时段的热斑和日食时段的热棘轮。研究结果可用于指导热管接收器PCM罐的设计和优化。

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  • 来源
    《Heat Transfer Engineering》 |2013年第9期|608-616|共9页
  • 作者

    XIAOHONG GUI; DAWEI TANG; SHIQIANG LIANG; XIUGAN YUAN;

  • 作者单位

    Address correspondence to Dr. Xiaohong Gui, Institute of Engineering Ther-monhvsics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China;

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China;

    Institute of Man-Machine-Environment Engineering, Beijing University of Aeronautics and Astronautics, Beijing, 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);
  • 原文格式 PDF
  • 正文语种 eng
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