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Effect of Tube Diameters on Marangoni Condensation Heat Transfer for Ethanol-Water Mixture Vapors

机译：管径对乙醇-水混合物蒸气的Marangoni冷凝水传热的影响

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摘要

Marangoni condensation attracts much attention in recent years. This study focused on the effect of tube diameters on Marangoni condensation heat transfer in the case of ethanol-water mixture vapors. Several tube outer diameters, including 0.793 mm, 1.032 mm, 1.221 mm, 10.0 mm, and 20.0 mm, were chosen to indicate the phenomenon, as well as the vertical plate. The ranges of the tube diameters were from macroscale to microscale. The experimental results showed that for pure steam the heat transfer coefficients monotonically increased with the decrease in diameters. For the ethanol-water mixture vapors, the reduction effect of liquid thickness and the accumulation effect of condensate liquid jointly influenced the heat transfer. In the case of macrosurfaces, the promotion effect caused by diameter decrease played a dominant role, and the heat transfer coefficients increased with decreasing the diameters. In the case of microsurfaces, the negative effect of condensate liquid accumulation became active and was the dominant role. The heat transfer coefficients did not always increase with decreasing the diameters, and a critical diameter corresponding to the largest heat transfer coefficients existed.
机译：近年来，Marangoni缩合引起了很多关注。这项研究集中在乙醇-水混合物蒸气的情况下，管径对Marangoni冷凝传热的影响。选择了几种管子外径（包括0.793 mm，1.032 mm，1.221 mm，10.0 mm和20.0 mm）以及垂直板来指示该现象。管直径的范围是从宏观到微观。实验结果表明，对于纯蒸汽，传热系数随直径的减小而单调增加。对于乙醇-水混合物蒸气，液体厚度的减小作用和冷凝液的聚集作用共同影响了热传递。在宏观表面的情况下，由直径减小引起的促进作用起主要作用，并且随着直径减小，传热系数增加。在微表面的情况下，冷凝液积聚的负面影响变得活跃，并起主导作用。传热系数并不总是随着直径的减小而增加，并且存在与最大传热系数相对应的临界直径。

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  • 来源
    《Heat Transfer Engineering》 |2016年第4期|323-331|共9页
  • 作者

    JINSHI WANG; JUNJIE YAN; XIPING CHEN; DAOTONG CHONG; JIPING LIU;

  • 作者单位

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shannxi 710049, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China,Shaanxi Regional Electric Power Group Co., Ltd, Xi'an, China;

    State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    Moe Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 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);
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  • 正文语种 eng
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