Vapor condensation with daytime radiative cooling

被引：132

作者：

Zhou, Ming ^{[1
]}

Song, Haomin ^{[2
]}

Xu, Xingyu ^{[3
]}

Shahsafi, Alireza ^{[1
]}

Qu, Yurui ^{[1
]}

Xia, Zhenyang ^{[1
]}

Ma, Zhenqiang ^{[1
]}

Kats, Mikhail A. ^{[1
]}

Zhu, Jia ^{[4
]}

Ooi, Boon S. ^{[5
]}

Gan, Qiaoqiang ^{[2
]}

Yu, Zongfu ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Elect & Comp Engn, Madison, WI 53705 USA

[2] SUNY Buffalo, Dept Elect Engn, Buffalo, NY 14260 USA

[3] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

[4] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Peoples R China

[5] King Abdullah Univ Sci & Technol, Photon Lab, Thala 239556900, Saudi Arabia

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2021年 / 118卷 / 14期

关键词：

passive vapor condensation; radiative cooling; solar evaporation;

D O I：

10.1073/pnas.2019292118

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A radiative vapor condenser sheds heat in the form of infrared radiation and cools itself to below the ambient air temperature to produce liquid water from vapor. This effect has been known for centuries, and is exploited by some insects to survive in dry deserts. Humans have also been using radiative condensation for dew collection. However, all existing radiative vapor condensers must operate during the nighttime. Here, we develop daytime radiative condensers that continue to operate 24 h a day. These daytime radiative condensers can produce water from vapor under direct sunlight, without active consumption of energy. Combined with traditional passive cooling via convection and conduction, radiative cooling can substantially increase the performance of passive vapor condensation, which can be used for passive water extraction and purification technologies.

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