[Dr. Raman's] prototype device employs radiative cooling, the phenomenon that makes buildings and parks feel cooler than the surrounding air after sunset. As Dr. Raman’s device releases heat, it does so unevenly, the top side cooling more than the bottom. It then converts the difference in heat into electricity. — The New York Times
After driving through a dark village in Sierra Leone, UCLA electrical engineer Aaswath Raman got the idea of building a device that didn't have to rely on solar power or wind to generate electricity after dark.
Dr. Raman and his research team did just that, and built a prototype thermoelectric device that uses radiative cooling techniques. It doesn't generate much power yet and still has a long way to go in research and development, but other academics like MIT materials scientist Jeffrey C. Grossman tell The New York Times that Dr. Raman's work is one promising step forward in the development of low-power applications at night.
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