19 Nov '11, 11pm

Contra-rotating wind turbine more efficient, much quieter. The future of wind power?: Filed under: Energy News

Contra-rotating wind turbine more efficient, much quieter. The future of wind power?: Filed under: Energy News

My Clean Break column today takes a look at a wind turbine design out of the University of Ottawa. It’s a twin contra-rotating blade system, meaning there are two sets of blades each spinning in opposite directions. The engineers who designed it say that wind-tunnel tests prove it is more efficient and — an added bonus — much quieter because the vibrations from each blade system help cancel out each other. Read the full column below: ——————————————————————— Tyler Hamilton There was a time not so long ago that seeing a single wind turbine spinning in the distance was a novel experience for most people. Not so much any more. There are now hundreds of wind turbines scattered across the province, representing 1,700 megawatts of wind capacity in Ontario alone — or just over a third of all capacity in Canada. Hundreds more are in the queue waiting to be installed. Most are large...

Full article: http://www.cleanbreak.ca/2011/11/19/contra-rotating-wind-...

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