Feature

Urban Heat: Recycling waste heat

Existing and developing methods for harnessing waste heat

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3:22pm, March 27, 2009

In the United States, only about one-eighth of the fuel people burn is converted into useful work. For a variety of reasons — losses during transmission of electrical power, simple laws of thermodynamics, friction and other inefficiencies — the other seven-eighths of the energy goes unused.

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