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Thursday, March 25 • 9:00am - 10:30am
The Twig Light: Ultra low-cost lighting in Ghana

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This session describes the development of a new, low cost, sustainable light source for poor villagers in developing countries called the Twig Light. The light makes use of a compact thermoelectric generator sandwiched and providing a thermal bridge between two pieces of ten-centimeter aluminum channel approximately fifteen centimeters in length. The lower section is cooled by sitting it in a small amount of water, while the upper section serves as a combustion chamber in which small pieces of wood or other combustible materials are burned. The subsequent temperature difference across the thermoelectric generator results in enough power to light a bank of LEDs sufficient to illuminate a small room. The technology was distributed in the rural Ghanaian village of Domeabra in the summer of 2009, and the performance will be evaluated during a return visit in 2010.

Thursday March 25, 2010 9:00am - 10:30am PDT
Mason II

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