Rotating evaporator for sustainable urban cooling and electricity generation

被引：2

作者：

Choi, Jihun ^{[1
]}

Han, Hyunsoo ^{[1
]}

Wani, Tawseef Ahmad ^{[1
]}

Kim, Daewoong ^{[1
]}

Jeon, Sangmin ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 37673, Gyeongbuk, South Korea

来源：

APPLIED THERMAL ENGINEERING | 2025年 / 259卷

基金：

新加坡国家研究基金会;

关键词：

Solar steam generation; Wind energy; Electricity generation; Evaporative cooling; Hierarchical structure;

D O I：

10.1016/j.applthermaleng.2024.124933

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We have developed, for the first time, a rotating evaporator that synergistically performs sustainable urban cooling and electricity generation. Fabricated using 3D printing, it features a nature-inspired hierarchical water path that mimics tree transpiration. Under 1-sun illumination, the rotating evaporator achieved an evaporation rate of 2.08 kg/m2h, and in the presence of wind at a speed of 4 m/s, the evaporator began rotating, enhancing the evaporation rate to 19.58 kg/m2h. When the rotator was fixed to prevent rotation, the evaporation rate decreased by 24 %, highlighting the advantage of rotation in water evaporation by effectively preventing vapor accumulation near the evaporating surface and supplying environmental energy. Notably, the rotating evaporator provided evaporative cooling 12.2 times greater than the incident solar energy, cooling 25.6 m3 of air by 1 degrees C in one hour, highlighting its potential to mitigate the urban heat island effect. This rotation also generated electricity, achieving a voltage of 1.07 V and a power density of 4.73 W/m2, which was sufficient for practical applications such as lighting and water purification.

引用

页数：7

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