Turning wasted calories into juice

Oct. 11, 2007
A miniature, thin-film thermoelectric generator from Nextreme, Research Triangle Park, N.C., turns heat into electricity using what is called the Seebeck Effect.

A temperature differential applied across the device changes its Fermi energy, creating an electrical potential.

Standard semiconductor fabrication methods build the 3.5-mm-sq solid-state generators. Power density is >3 W/cm2 at a ΔT = 120°C, higher than that of bulk materials and about 1/20th the thickness. Target markets and applications include automotive, military and aerospace, thermal batteries, medical implants and wireless sensor networks.

Nextreme, www.nextreme.com

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