Sustainable thin-film condensation with free surface flow through water film network

被引：6

作者：

Han, Taeyang ^{[1
]}

Choi, Younghyun ^{[2
]}

Jeong, Jaeyoung ^{[2
]}

Choi, Jae Hyun ^{[2
]}

Jo, HangJin ^{[1
,2
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Div Adv Nucl Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Dept Mech Engn, 77 Cheongam Ro, Pohang 37673, Gyeongbuk, South Korea

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2022年 / 196卷

基金：

新加坡国家研究基金会;

关键词：

Condensation; Free surface flow; Sustainability; Dew harvesting; Heat transfer; Colloidal lithography; DROPWISE CONDENSATION; HEAT-TRANSFER; EFFICIENCY; DROPLET;

D O I：

10.1016/j.ijheatmasstransfer.2022.123222

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In various energy industries, sustainable and efficient condensation is crucial for minimizing energy sys-tem size and cost. This study developed a water drainage system (i.e., a water film network), which mimicked the fast water transport through the water film on Sarracenia trichomes, for sustainably en-hanced condensation even on a hydrophilic surface. The water film network absorbed and drained the surrounding microscale condensates because of the Laplace pressure difference, resulting in the contin-uous shedding or the thin-film condensation (< few micrometers thick). The water film network en-hanced the dew harvesting efficiency by up to 577.8%, and thin-film condensation was sustained even under harsh conditions that oxidized the surface. Our findings suggest a way to sustainably enhance con-densation performance without hydrophobic functionalization, and provide insights that the free surface flow through the water film channel can significantly improve the performance of thermal management systems through the minimization of the viscous pressure drop. (c) 2022 Elsevier Ltd. All rights reserved.

引用

页数：11

共 53 条

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