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A sound way to turn heat into electricity
Posted on Monday, June 04, 2007 @ 23:29:46 UTC by vlad

Science University of Utah physicist Orest Symko holds a match to a small heat engine that produces a high-pitched tone by converting heat into sound. Symko's research team is combining such heat engines with existing technology that turns sound into electricity, resulting in devices that can harness solar energy in a new way, cool computers and other electronics. Credit: University of Utah

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. They will present their findings on Friday, June 8 during the annual meeting of the Acoustical Society of America at the Hilton Salt Lake City Center hotel.

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. Army, which is interested in "taking care of waste heat from radar, and also producing a portable source of electrical energy which you can use in the battlefield to run electronics" he says.

Symko expects the devices could be used within two years as an alternative to photovoltaic cells for converting sunlight into electricity. The heat engines also could be used to cool laptop and other computers that generate more heat as their electronics grow more complex. And Symko foresees using the devices to generate electricity from heat that now is released from nuclear power plant cooling towers.

How to Get Power from Heat and Sound

Full Story: http://www.physorg.com/news100141616.html
Source: University of Utah

In other news:

ALUMINUM FOIL LAMPS OUTSHINE INCANDESCENT LIGHTS, June 04
Researchers at the University of Illinois are developing panels of microcavity plasma lamps that may soon brighten people's lives. The thin, lightweight panels could be used for residential and commercial lighting, and for certain types of biomedical applications.
Full story at http://www.physorg.com/news100179845.html




 
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"A sound way to turn heat into electricity" | Login/Create an Account | 1 comment | Search Discussion
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Material that turns heat to power gets efficiency hike (Score: 1)
by vlad on Thursday, July 24, 2008 @ 23:17:02 UTC
(User Info | Send a Message) http://www.zpenergy.com
19:00 24 July 2008/ NewScientist.com news service/ Colin Barras

Your car wastes around 60% of the energy you put into it as heat. But that could soon change, thanks to a new way to boost the efficiency of thermoelectric materials [en.wikipedia.org] that are able to convert heat into electricity.

Just as steam engines use heat to move water vapour to drive the machinery, thermoelectric devices use heat to move electrons that can be harnessed usefully. Since so many mechanical and electrical devices produce waste heat, the materials could potentially allow huge efficiency savings.

Adding small chunks of thermoelectric material to any heated surface, like a car exhaust or a computer processor, could produce essentially free energy...

More [technology.newscientist.com]





 

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