Testing Cheap Wind Power

Photo: Black box: This eight-kilowatt wind turbine uses a continuously variable transmission--the small, silver-colored unit on the left below the rotor--to regulate its power. The turbine’s developer, Cedar Park, TX-based Viryd Technologies, claims that its use of mechanical instead of digital power regulation will cut manufacturing costs by 20 percent and boost power output. Credit: Viryd Technologies

From Technology Review:

A continuously variable transmission could lead to cheaper wind power--if it is rugged enough.

Federal stimulus funds awarded to a wind-energy research consortium led by Illinois Institute of Technology will accelerate testing of small wind turbines that could point the way towards more efficient utility-scale machines. The eight-kilowatt turbines, the product of Cedar Park, TX-based Viryd Technologies, use a mechanical approach--continuously variable transmission (CVT) technology--to convert fluctuating wind speeds into the precise stream of alternating current required by power grids. If it can replace the pricey power electronics that regulate power in most turbines today, the same technology could cut the cost of wind-power generation at any scale.

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