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首页> 外文期刊>Journal of Heat Transfer >Microporous Coatings to Maximize Pool Boiling Heat Transfer of Saturated R-123 and Water
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Microporous Coatings to Maximize Pool Boiling Heat Transfer of Saturated R-123 and Water

机译:微孔涂层可最大化饱和R-123和水的池沸腾传热

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摘要

The present research is an experimental study for the enhancement of boiling heat transfer using microporous coatings. Two types of coatings are investigated: one that is bonded using epoxy and the other by soldering. Effects on pool boiling performance were investigated, of different metal particle sizes of the epoxy-based coating, on R-123 refrigerants, and on water. All boiling tests were performed with 1 cm × 1 cm test heaters in the horizontal, upward-facing orientation in saturated conditions at atmospheric pressure and under increasing heat flux. The surface enhanced by the epoxy-based microporous coatings significantly augmented both nucleate boiling heat transfer coefficients and critical heat flux (CHF) of R-123 relative to those of a plain surface. However, for water, with the same microporous coating, boiling performance did not improve as much, and thermal resistance of the epoxy component limited the maximum heat flux that could be applied. Therefore, for water, to seek improved performance, the solder-based microporous coating was applied. This thermally conductive microporous coating, TCMC, greatly enhanced the boiling performance of water relative to the plain surface, increasing the heat transfer coefficient up to ~5.6 times, and doubling the CHF.
机译:本研究是使用微孔涂层增强沸腾传热的实验研究。研究了两种类型的涂层:一种使用环氧树脂粘合,另一种通过焊接粘合。研究了环氧基涂层的不同金属粒径,R-123制冷剂和水对池沸腾性能的影响。所有沸腾测试均使用1 cm×1 cm测试加热器在大气压下,热通量增加的饱和条件下以水平,朝上的方向进行。相对于普通表面,由环氧基微孔涂层增强的表面显着提高了R-123的核沸腾传热系数和临界热通量(CHF)。然而,对于具有相同微孔涂层的水,沸腾性能并未得到很大改善,并且环氧组分的耐热性限制了可以施加的最大热通量。因此,对于水,为了寻求改善的性能,施加了基于焊料的微孔涂层。这种导热微孔涂层TCMC大大提高了水相对于平整表面的沸腾性能,将热传递系数提高了约5.6倍,并使CHF倍增。

著录项

  • 来源
    《Journal of Heat Transfer》 |2015年第8期|081501.1-081501.7|共7页
  • 作者单位

    Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019;

    Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019;

    Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019;

    Department of Mechanical and Aerospace Engineering, The University of Texas at Arlington, Arlington, TX 76019;

    Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, TX 75080;

  • 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

    pool boiling; critical heat flux; nucleate boiling heat transfer; microporous coating;

    机译:池沸腾;临界热通量;核沸腾传热;微孔涂层;

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