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Experimental study of an ammonia loop heat pipe with a flat plate evaporator

机译：平板蒸发器氨回路热管的实验研究

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摘要

In the present paper, the combination of a primary wick and a secondary wick was put forward and applied to the loop heat pipe. The evaporator was constructed from 304L stainless steel, and anhydrous ammonia with a purity of 99.995% was selected as the working fluid. A secondary wick made of 400-mesh stainless steel wire mesh was inserted into the evaporator, and a blind hole was made in its radial direction. Some partial grooves at the end of liquid line served as the returning liquid exit, and it was wrapped by the blind hole for fear that it be directly exposed to the compensation chamber, potentially causing it to be blocked by the vapor. The experimental results demonstrated that the loop could start up successfully and operated without temperature oscillations under the given heat load range from 20 W to 110 W in the horizontal orientation. In addition, the system rapidly responded to heat load cycle. The thermal resistance of the loop and the evaporator heat-transfer capacity were analyzed, and two operation modes existed because of the different distributions of the operating temperature with the evaporator wall temperature above or below 60 ℃.
机译：在本文中，提出了初级芯和次级芯的组合，并将其应用于回路热管。蒸发器由304L不锈钢制成，并选择纯度为99.995％的无水氨作为工作流体。将由400目的不锈钢丝网制成的次级芯插入蒸发器中，并在其径向上形成盲孔。液体管线末端的一些局部凹槽用作返回的液体出口，它被盲孔包裹着，以免它直接暴露在补偿腔中，从而有可能被蒸汽阻塞。实验结果表明，在给定的水平方向热负荷范围为20 W至110 W的情况下，该环路可以成功启动并在没有温度波动的情况下运行。另外，系统对热负荷循环迅速做出了响应。分析了回路的热阻和蒸发器的传热能力，并且当蒸发器壁温高于或低于60℃时，由于运行温度的分布不同，因此存在两种运行模式。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2016年第11期|1050-1055|共6页
  • 作者

    He Song; Liu Zhi-chun; Zhao Jing; Jiang Chi; Yang Jin-guo; Liu Wei;

  • 作者单位

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China;

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China, 318 Power Building, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China;

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China;

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China;

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China;

    School of Energy and Engineering Power, Huazhong University of Science and Technology, Wuhan 430074, China;

  • 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

    Loop heat pipe; Flat plate evaporator; Secondary wick; Biporous wick; Thermal characteristics;

    机译：回路热管;平板蒸发器;次要灯芯;双孔灯芯;热特性;

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