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Investigation of Heat Transfer in Evaporator of MicroChannel Loop Heat Pipe

机译：微通道回路热管蒸发器内传热研究

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摘要

Loop heat pipes (LHP) are heat transfer devices which use evaporation and condensation of working fluid to transfer heat and use capillary forces to provide fluid circulation in a closed loop. One of the main applications of LHP is cooling of electronic components. Further development of this field is associated with miniaturization. Thus, there are strict limits imposed upon size of elements of heat transfer devices in electronics cooling. One of such elements is an evaporator of the LHP, its main element. This paper deals with the LHP evaporator and is aimed at showing dependence of wick conductivity, thickness, and vapor flow geometry on overall heat transfer performance. An open loop experimental setup was created. Experiments were carried out with various configurations. The evaporator consisted of a microchannel (MC) plate, with groove widths of 100 and 300 μm, wick (metal and nonmetal porous materials were used) and a compensation chamber (CC). Heat load varied from 20 to MOW in steps of 20W. The area of the heater was equal to 19 × 19 mm~2. The working fluid is de-ionized water. Experimental results include data on temperature distribution across the wick's height, temperature of microchannel's surface, and temperature of water in the compensation chamber. The results reveal a potential for performing optimization of the zone of evaporation in order to produce thinner LHP evaporators.
机译：环路热管（LHP）是传热设备，它使用工作流体的蒸发和冷凝来传递热量，并利用毛细作用力在闭环中提供流体循环。 LHP的主要应用之一是电子元件的冷却。该领域的进一步发展与小型化有关。因此，电子冷却中的传热装置的元件尺寸受到严格限制。这种元件之一是LHP的蒸发器，它是其主要元件。本文研究的是LHP蒸发器，旨在显示灯芯电导率，厚度和蒸汽流的几何形状对整体传热性能的依赖性。创建了一个开环实验装置。用各种配置进行了实验。蒸发器由一个微槽（MC）板组成，该板的槽宽分别为100和300μm，灯芯（使用金属和非金属多孔材料）和一个补偿室（CC）。热负荷从20到MOW以20W为步长变化。加热器的面积等于19×19 mm〜2。工作流体是去离子水。实验结果包括有关灯芯高度上的温度分布，微通道表面温度以及补偿室中水温的数据。结果显示出进行蒸发区域优化以生产更薄的LHP蒸发器的潜力。

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  • 来源
    《Journal of Heat Transfer》 |2013年第10期|101006.1-101006.7|共7页
  • 作者

    Alexander A. Yakomaskin; Valery N. Afanasiev; Nikolay N. Zubkov; Dmitry N. Morskoy;

  • 作者单位

    Department of Thermophysics, Bauman Moscow State Technical University, 2nd Baumanskaya Street, 5, Moscow 105005, Russia;

    Department of Tool Engineering and Technologies, Bauman Moscow State Technical University, 2nd Baumanskaya Street, 5, Moscow 105005, Russia;

    Department of Thermophysics, Bauman Moscow State Technical University, 2nd Baumanskaya Street, 5, Moscow 105005, Russia;

  • 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

    evaporator; loop heat pipe; microchannel;

    机译：蒸发器回路热管;微通道;

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