Selasa, 19 November 2013

Cooling when there’s too much heat

MIT News - 1 minggu yang lalu
When an earthquake and tsunami struck Japan’s Fukushima nuclear power plant in 2011, knocking out emergency power supplies, crews sprayed seawater on the reactors to cool them — to no avail. One possible reason: Droplets can’t land on surfaces that hot. Instead, they instantly begin to evaporate, forming a thin layer of vapor and then bouncing along it — just as they would in a hot cooking pan. Now, MIT researchers have come up with a way to cool hot surfaces more effectively by keeping droplets from bouncing. Their solution: Decorate the surface with tiny structures and then coat... lainnya »

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