Steam condensation heat transfer enhancement through droplet properties manipulation with hybrid surfaces

被引：0

作者：

Peng, Benli ^{[1
]}

Ma, Xuehu ^{[1
]}

Lan, Zhong ^{[1
]}

Xu, Wei ^{[1
]}

Wen, Rongfu ^{[1
]}

Bai, Tao ^{[1
]}

机构：

[1] Liaoning Provincial Key Laboratory of Clean Utilization of Chemical Resources, Institute of Chemical Engineering, Dalian University of Technology, Dalian, 116024, Liaoning

来源：

Huagong Xuebao/CIESC Journal | 2015年 / 66卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Condensation; Heat transfer; Heat transfer enhancement; Heat transfer model of hybrid surfaces; Lattice Boltzmann simulation; Surface;

D O I：

10.11949/j.issn.0438-1157.20150390

中图分类号：

学科分类号：

摘要：

The hybrid surfaces with hydrophobic and hydrophilic regions arranged regularly and alternatively are prepared. Various widths and area fraction of the hydrophobic region are designed. The droplet properties (such as droplet drainage mode and maximum droplet radius) during steam condensation at atmospheric pressure are visualized. The motion process of condensate on hybrid surfaces is simulated by lattice Boltzmann method. The influences of the widths and surface subcooling of hydrophobic and hydrophilic region on enhancement of the steam condensation heat transfer of the hybrid surfaces are investigated. The influencing factors on the steam condensation heat transfer performance of hybrid surfaces are analyzed and calculated by hybrid condensation heat transfer model. The comparison between model and experimental results is also conducted. It is found that the droplet on the hydrophobic region can spontaneously migrate into the hydrophilic region. The dropwise condensation heat transfer of steam can be effectively enhanced by the finely designed hybrid surfaces. The enhancement factor of the heat transfer performance of the hybrid surface can approach to 1.20. When the width of the hydrophobic region is about 0.55 mm, the heat transfer performance of hybrid surface reaches the maximum. Furthermore, the effect of the heat transfer enhancement of hybrid surfaces decreases with the increase of surface subcooling. The comparison results indicate that the analytical (theoretical) results can well and conveniently predict the experimental results. © All right reserved.

引用

页码：3826 / 3833

页数：7

共 29 条

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