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Effect of Surface Structure Complexity on Interfacial Droplet Behavior of Superhydrophobic Titanium Surfaces for Robust Dropwise Condensation

Authors: Je-Un Jeong; Dae-Yun Ji; Kwon-Yeong Lee; Woonbong Hwang; Chang-Hun Lee; Sung-Jae Kim; Jeong-Won Lee;

Effect of Surface Structure Complexity on Interfacial Droplet Behavior of Superhydrophobic Titanium Surfaces for Robust Dropwise Condensation

Abstract

In general, the dropwise condensation supported by superhydrophobic surfaces results in enhanced heat transfer relative to condensation on normal surfaces. However, in supersaturated environments that exceed a certain supersaturation threshold, moisture penetrates the surface structures and results in attached condensation, which reduces the condensation heat transfer efficiency. Therefore, when designing superhydrophobic surfaces for condensers, the surface structure must be resistant to attached condensation in supersaturated conditions. The gap size and complexity of the micro/nanoscale surface structure are the main factors that can be controlled to maintain water repellency in supersaturated environments. In this study, the condensation heat exchange performance was characterized for three different superhydrophobic titanium surface structures via droplet behavior (DB) mapping to evaluate their suitability for power plant condensers. In addition, it was demonstrated that increasing the surface structure complexity increases the versatility of the titanium surfaces by extending the window for improved heat exchange performance. This study demonstrates the usefulness of DB mapping for evaluating the performance of superhydrophobic surfaces regarding their applicability for industrial condenser systems.

Country
Korea (Republic of)
Related Organizations
Keywords

Technology, Superhydrophobicity, Condensation, Heat exchangers, condensation heat transfer, ENERGY, Power plant condensers, micro-nanostructure, HEAT-TRANSFER, Heat transfer, Surface properties, Droplet behavior, superhydrophobic surface, SIMPLE FABRICATION, WETTABILITY, Titanium, Microscopy, QC120-168.85, T, Superhydrophobic surface, 600, ALUMINUM, Dropwise condensation, Engineering (General). Civil engineering (General), Mapping, ENHANCED CONDENSATION, Drops, Electrical engineering. Electronics. Nuclear engineering, TA1-2040, Titanium surfaces, Article, Super-hydrophobic surfaces, Heat exchange performance, Condensation heat transfer, STEAM, QH201-278.5, Surface structure, dropwise condensation, 540, Structure complexity, 620, TRANSPARENT, TK1-9971, Enhanced heat transfer, Energy efficiency, Descriptive and experimental mechanics, TUBE, droplet behavior, Micro-nanostructure

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    6
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Average
Top 10%
Green
gold
Related to Research communities
Energy Research