气流
风力发电
空速
风速
涡轮机
下降(电信)
流量(数学)
风洞
海洋工程
气象学
环境科学
机械
材料科学
地质学
电气工程
航空航天工程
机械工程
物理
工程类
作者
Shan Peng,Binglin Xie,Yanlei Wang,Mi Wang,Xiaoxin Chen,Xiaoyu Ji,Chenyang Zhao,Gang Lü,Dianyu Wang,Ruiran Hao,Mingzhan Wang,Nan Hu,Hongyan He,Yulong Ding,Shuang Zheng
标识
DOI:10.1073/pnas.2303466120
摘要
Low-grade wind with airspeed V wind < 5 m/s, while distributed far more abundantly, is still challenging to extract because current turbine-based technologies require particular geography (e.g., wide-open land or off-shore regions) with year-round V wind > 5 m/s to effectively rotate the blades. Here, we report that low-speed airflow can sensitively enable directional flow within nanowire-anchored ionic liquid (IL) drops. Specifically, wind-induced air/liquid friction continuously raises directional leeward fluid transport in the upper portion, whereas three-phase contact line (TCL) pinning blocks further movement of IL. To remove excessive accumulation of IL near TCL, fluid dives, and headwind flow forms in the lower portion, as confirmed by microscope observation. Such stratified circulating flow within single drop can generate voltage output up to ~0.84 V, which we further scale up to ~60 V using drop “wind farms”. Our results demonstrate a technology to tap the widespread low-grade wind as a reliable energy resource.
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