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首页> 外文期刊>International Journal of Heat and Mass Transfer >Flow condensation heat transfer enhancement in a mini-channel with hydrophobic and hydrophilic patterns
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Flow condensation heat transfer enhancement in a mini-channel with hydrophobic and hydrophilic patterns

机译：具有疏水和亲水模式的小通道中的流动冷凝传热增强

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摘要

The study examined the enhancement of flow condensation of steam on hydrophobic and hydrophilic surfaces. Six 1.06 mm mini-gaps were tested at pressures of 350-400 kPa, average qualities of 0.2-0.95 and mass fluxes of 50-200 kg/m~2s. The surfaces included hydrophilic copper, hydrophobic Teflon AFTM, and four surfaces with combined Teflon and hydrophilic patterns; pattern selection was guided by an analytical model. Condensing heat transfer coefficients on hydrophobic and hydrophobic/hydrophilic patterned surfaces reached a value of up to 425,000 W/m~2K, surpassing the hydrophilic surface by an order of magnitude. Enhancement factors of 3.2-13.4 times that of the hydrophilic channel were found in the hydrophobic channel; combined with a lack of dependence on mass flux or quality, the data strongly suggested that dropwise condensation was promoted and sustained throughout the flow condensation process on hydrophobic and patterned surfaces. For the hydrophilic copper mini-gap, heat transfer coefficients were a strong function of quality, as well as a function of mass flux at higher qualities, which demonstrated the development and growth of a liquid film as quality decreased, and were well predicted by Kim et al.(2013)correlation, with a mean average error of 8.9%.
机译：该研究检查了疏水和亲水表面上蒸汽流动凝结的增强。在350-400 kPa的压力，0.2-0.95的平均质量和50-200 kg / m〜2s的质量通量下测试了六个1.06 mm的小间隙。表面包括亲水性铜，疏水性Teflon AFTM，以及四个具有特氟隆和亲水性图案组合的表面。模式选择由分析模型指导。疏水性和疏水性/亲水性图案表面上的冷凝传热系数达到高达425,000 W / m〜2K，比亲水性表面高一个数量级。在疏水通道中发现增强因子是亲水通道的3.2-13.4倍；结合对质量通量或质量的不依赖关系，该数据强烈表明，在疏水性和有图案的表面上，在整个流动冷凝过程中，滴状冷凝均得到促进和维持。对于亲水性铜微间隙，传热系数是质量的重要函数，而在较高质量下是质量通量的函数，这证明了液膜随着质量下降而发展和增长，并得到了Kim的良好预测等人（2013）的相关性，平均平均误差为8.9％。

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  • 来源
  • 作者

    Melanie M. Derby; Abhra Chatterjee; Yoav Peles; Michael K. Jensen;

  • 作者单位

    Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, United States,Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS 66506, United States,Department of Mechanical and Nuclear Engineering, Kansas State University, Manhattan, KS 66505, United States;

    Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, United States;

    Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, United States;

    Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, United States;

  • 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

    Condensation; Hydrophobic; Hydrophilic; Biphilic; Pattern; Minichannel; MicroChannel;

    机译：缩合;疏水性亲水性双亲图案;迷你频道;微通道;

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