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Pop Science – Best of What’s New ’08

Green Tech Winners

Electricity that’s all hot air.

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

Original article from Pop Science at http://www.popsci.com/bown/2008/product/electratherm-green-machine

 

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