Effect of surface nanostructure and surface free energy on dropwise condensation heat transfer

被引：0
|
作者：
Ma, Xue-Hu [1 ]
Wang, Ming-Zhe [1 ]
Lan, Zhong [1 ]
Wang, Si-Fang [1 ]
Li, Xiao-Nan [1 ]
机构：
[1] Institute of Chemical Engineering, Dalian University of Technology, Dalian 116012, China
来源：
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2009年 / 30卷 / 10期
关键词：
Surface chemistry - Heat transfer - Free energy - Self assembled monolayers - Condensation - Hydrophobicity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Fine polish and oxidation etching method are applied to prepare micro- and nano-structures on copper surfaces. After that, self-assembled monolayers (SAMs) of n-octadecyl mercaptan are coated on. In air circumstance, the contact angle of water on the nano-structured surface (SAM-1) is 160 and that on the finely polished coated surface (SAM-2) is 116. Both coated surfaces have promoted dropwise condensation very well. The condensation heat transfer performance of the SAM-2 is much better than that of the SAM-1. The coordinated effects of difference of surface free energy between nanostructure and liquid-solid on the dropwise condensation heat transfer are analyzed.
引用
收藏
页码：1752 / 1754
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