Getting a charge out of water droplets


By David L. Chandler – In attempting to develop an improved heat-transfer surface to be used as a condenser in applications such as power plants—that droplets on a superhydrophobic surface convert surface energy to kinetic energy as they merge to form larger droplets.

This sometimes causes the droplets to spontaneously jump away, enhancing heat transfer by 30% relative to other techniques.

They later found that in that process, the jumping droplets gain a small electric charge—meaning that the jumping, and the accompanying transfer of heat, could be enhanced by a nearby metal plate whose opposite charge is attractive to the droplets.

Now the researchers have shown that the same process can be used to generate power. more> http://tinyurl.com/qdf7oot

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