4PlanetEarth
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Electratherm Green Machine
Electratherm’s closet-size device is the first machine to power generators with waste heat of as low as 200ºF, a temperature given off by common boilers or chillers in office buildings. (Industrial waste-heat recyclers require 1,000º blazes.) The heat boils refrigerants into a pressurized gas that spins two small, screw-shaped rotors. From $128,000; electratherm.com
11.11.2008 at 07:28pm - Comment by 4PlanetEarthAccording to the US Dept of Energy, there is more waste heat available from US industry than all energy currently produced renewable sources combined (7 Quadrillion BTU). It's about time we utilize it!
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December 2009: Best of What's New
In our December issue, Popular Science names the 100 best innovations of the year: bombproof wallpaper, self-parking cars, the fastest helicopter, and 97 more. Plus inventor profiles and videos.
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