A water collection system with ultra-high harvest rate and ultra-low energy consumption by integrating triboelectric plasma

摩擦电效应 材料科学 低能 等离子体 能源消耗 消费(社会学) 纳米技术 工程物理 复合材料 电气工程 原子物理学 工程类 社会科学 物理 量子力学 社会学
作者
Guangqin Gu,Guangxiang Gu,Jingsheng Wang,Xi Yao,Jie Ju,Gang Cheng,Zuliang Du
出处
期刊:Nano Energy [Elsevier]
卷期号:96: 107081-107081 被引量:22
标识
DOI:10.1016/j.nanoen.2022.107081
摘要

In many areas of the world, fog harvesting could be a sustainable solution to water shortage. However, due to the limitation of deposition efficiency and shedding rate of the droplets, the fog/water conversion efficiency is extremely low. Here, a self-powered fog harvesting system by integrating triboelectric plasma is developed. Taking the advantage of space charges injected through triboelectric plasma into the fog flow, tiny water droplets deposit onto the collecting mesh with unprecedentedly high efficiency. By endowing the mesh with superhydrophobicity, water collected on it sheds off quickly, which guarantees fast regeneration of the fog collection system. The final water harvest rate reaches 1311.79 g/(m 2 ·min), about 3.28 times of the maximum value reported in literatures, with the fog/water conversion efficiency of 55.5%. More importantly, the energy consumption is minimized to 0.052 kWh/m 3 , far lower than ~ 3–5 kWh/m 3 energy consumption in the frequently-used reverse-osmosis desalination technique and ~ 2 kWh/m 3 in the newly-developed high voltage power supply-assisted fog harvesting system. A physical model based on the synergistic effect of triboelectric plasma and surface wettability is proposed to illuminate the mechanism. This self-powered efficient fog harvesting system provides great promise to relieve local water scarcity energy-effectively. A self-powered fog harvesting system by integrating triboelectric plasma is developed. The final water harvest rate reaches 1311.79 g/(m 2 ·min), about 3.28 times of the maximum value reported in literatures, with the fog/water conversion efficiency of 55.5%. • A self-powered fog harvesting system by integrating triboelectric plasma is developed. • Taking the advantage of space charges injected through triboelectric plasma, tiny water droplets deposit efficiently. • The final water harvest rate reaches 1311.79 g/(m 2 ·min) with the fog/water conversion efficiency of 55.5%. • The energy consumption is minimized to 0.052 kWh/m 3 , far lower than reverse-osmosis desalination technique.
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