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Experimental Research on Thermal Performance of Ultra-Thin Flattened Heat Pipes

  • TANG Yongle ,
  • CAO Jianguang ,
  • WANG Shuangfeng
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  • 1. Key Lab of Heat Transfer Enhancement and Energy Conservation of Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
    2. Shanghai Institute of Satellite Engineering, Shanghai 200240, China

网络出版日期: 2023-12-04

基金资助

We would like to express our gratitude to National Key Research & Development Program of China (Grant No. 2017YFB0406100) and Guangzhou Municipal Science & Technology Program Project (Grant No. 201802010013).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Experimental Research on Thermal Performance of Ultra-Thin Flattened Heat Pipes

  • TANG Yongle ,
  • CAO Jianguang ,
  • WANG Shuangfeng
Expand
  • 1. Key Lab of Heat Transfer Enhancement and Energy Conservation of Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
    2. Shanghai Institute of Satellite Engineering, Shanghai 200240, China

Online published: 2023-12-04

Supported by

We would like to express our gratitude to National Key Research & Development Program of China (Grant No. 2017YFB0406100) and Guangzhou Municipal Science & Technology Program Project (Grant No. 201802010013).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

压扁型超薄热管是解决狭小空间高热流密度散热问题的有效手段。决定压扁型超薄热管传热性能的因素包括:其整体形状和尺寸、吸液芯结构、工质种类以及充液率等。其中,充液率的变化不仅会改变热管内部工质的含量,还会影响内部工质气、液两相的空间分配占比。因此,探究充液率对压扁型超薄热管传热性能的影响规律对指导其生产应用具有至关重要的作用。本文对四组具有不同吸液芯结构的压扁型超薄热管分别进行了一系列充液率下的实验研究。结果表明,液体工质的填充体积应占据热管内部空腔总体积的22%~37%之间,以避免热管在运行过程中出现传热恶化。此外,本文建立了该压扁型超薄热管不同工况下蒸发器温度的预测模型,为其生产应用提供指引。

本文引用格式

TANG Yongle , CAO Jianguang , WANG Shuangfeng . Experimental Research on Thermal Performance of Ultra-Thin Flattened Heat Pipes[J]. 热科学学报, 2022 , 31(6) : 2346 -2362 . DOI: 10.1007/s11630-022-1710-x

Abstract

Ultra-thin flattened heat pipe (UTHP) is an effective solution to solve the problem of high-power density heat dissipation in narrow space. The key factors that determine its thermal performance include: the shapes and sizes of the UTHP, the wick structure, the type of working fluid and its filling ratio. The change in the filling ratio means not only a change in the amount of the working fluid, but also a change in the space distribution of the gas and liquid phases inside the heat pipe. Therefore, it is important to explore the effect of liquid filling ratio on the thermal performance of UTHP. It can provide effective guidance for the production of UTHP. In this work, experiments were conducted on four groups of UTHPs with different mesh wicks under a series of liquid filling ratios. The results demonstrate that the volume of the filling working fluid should account for 22%–37% of the total internal volume of the UTHP to avoid deterioration of heat transfer during the operation of the UTHP. In addition, a prediction model of the evaporator temperature has been established to provide guidance for the application of UTHPs.

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