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Review of two types of surface modification on pool boiling enhancement: Passive and active
Renewable and Sustainable Energy Reviews ( IF 16.3 ) Pub Date : 2020-06-11 , DOI: 10.1016/j.rser.2020.109926
Wei Li , Renkun Dai , Min Zeng , Qiuwang Wang

Many methods for enhancing nucleate pool boiling have been proposed to improve the two-phase heat transfer performance in recent years. This article offers a comprehensive comment from published literature in terms of the surface modification of reinforcing heat transfer. Two types of surface modification regarding enhancement of boiling heat transfer coefficient and critical heat flux are categorized for the first time in this paper. The first and most widespread way is artificially changing the characteristics of the surface in advance to improve boiling performance, such as structured surface and surface coating with nanoparticles, namely, the “passive” technology. Oppositely, the “active” one on boiling enhancement seems to have more potential for development and it is favored by some researchers. In brief, the transformation of geometrical shape or characteristics such as wettability spontaneously occurs during boiling, the critical heat flux would thus be delayed. The heat transfer performance, as a result, would be significantly ameliorated. This kind of “smart surface” is usually made up of specific shape memory alloy, polymers, metallic oxides, etc. The mechanisms of boiling enhancement regarding modified surfaces are also reviewed, the capillary wicking, for instance, plays vital role in it. Moreover, various surfaces are presented with emphasis on their advantages/disadvantages. Through the analysis and comparison of the two kinds of modified surfaces, this review also points out some challenges existing in the current studies concerning this topic, such as numerical study, which are worth solving or optimizing to efficiently and economically improve the boiling heat transfer in future.



中文翻译:

两种关于池沸腾增强的表面改性的综述:被动和主动

近年来,已经提出了许多用于增强成核池沸腾的方法来改善两相传热性能。本文就增强传热的表面改性方面提供了来自已发表文献的全面评论。本文首次对提高沸腾传热系数和临界热通量的两种表面改性进行了分类。第一种也是最广泛使用的方法是预先人为地改变表面特性以提高沸腾性能,例如结构化表面和纳米粒子表面涂层,即“被动”技术。相反,沸腾增强的“活性”似乎具有更大的发展潜力,并且受到一些研究人员的青睐。简单来说,沸腾过程中会自然发生几何形状或特性(如润湿性)的转变,因此临界热通量将被延迟。结果,传热性能将显着改善。这种“智能表面”通常由特定的形状记忆合金,聚合物,金属氧化物等组成。还对改性表面的沸腾增强机理进行了综述,例如毛细作用在其中起着至关重要的作用。此外,提出了各种表面,重点在于它们的优点/缺点。通过对两种改性表面的分析和比较,本文还指出了有关该主题的当前研究中存在的一些挑战,例如数值研究,

更新日期:2020-06-11
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