High efficient fog-water harvesting via spontaneous swallowing mechanism
Nano Energy(2022)
摘要
Inverse wettability gradient movement triggered by water droplets' surface energy is conductive to many fields, such as droplet transport, water supply and water nanogenerator. Here, a novel phenomenon of spontaneous inverse wettability gradient movement of droplet (i.e., the "swallowing") is revealed (with an energy transformation ratio at 64.1%) and successfully applied to a new fog-water harvester (i.e., unique gradient wire: UGW). In wetting area on UGW, the largest droplet hanging on more hydrophilic end acts as a gluttonous droplet moving towards inverse wettability to continuously coalesce other droplets and to gain kinetic energy from released surface energy of droplets, resulting in an accelerative reciprocating action like a windshield wiper. As for a given fog flow of 150 g s(-1) m(-2), the maximum kinetic energy and velocity of the gluttonous droplet are 1.83 mu J and 3.8 cm s(-1), respectively. This process needs no extra energy consumption and realizes a high water harvest efficiency (1.83 mu L cm(-1) s(-1)). This "Swallowing" action on such UGW allows droplet to accelerate gradually, which is beneficial to power generation from surface energy, heat transfer, and fog-water harvesting, etc.
更多查看译文
关键词
Hydrophilic nanopattern gradient,Low energy transportation,High efficient conversion from surface energy to kinetic energy,Gradual acceleration of droplets,Windshield wiper-like movement
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要