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Ötletláda Ubuntu-News Science Daily: News & Articles in Science, Health, Environme MemeTracker: tracking news phrases over the web A Sound Way To Turn Heat Into Electricity University of Utah physicists developed small devices that turn heat into sound and then into electricity. The technology holds promise for changing waste heat into electricity, harnessing solar energy and cooling computers and radars. "We are converting waste heat to electricity in an efficient, simple way by using sound," says Orest Symko, a University of Utah physics professor who leads the effort. "It is a new source of renewable energy from waste heat." Five of Symko's doctoral students recently devised methods to improve the efficiency of acoustic heat-engine devices to turn heat into electricity. Symko plans to test the devices within a year to produce electricity from waste heat at a military radar facility and at the university's hot-water-generating plant. The research is funded by the U.S. Symko expects the devices could be used within two years as an alternative to photovoltaic cells for converting sunlight into electricity. How to Get Power from Heat and Sound

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