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Forum Index : Windmills : A new VAWT that looks promising
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solarmike Newbie  Joined: 14/11/2005 Location: CanadaPosts: 26 |
I met some people from Niagara Wind Power from Ontario, Canada and they told me about a new wind turbine that they say will revolutionize residential wind energy use. It takes advantage or the slope of the roof to increase wind speed. It also uses a ring of permanent magnets that rotate around a fixed stator. Has anyone else heard of this machine? Michael Chownyk Alternative Energy Resources I am solarmike |
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Megawatt Man Senior Member  Joined: 03/05/2006 Location: AustraliaPosts: 119 |
Here's another, at http://www.thewatt.com/article938.html. This design uses vertical airfoils around a Savonius rotor. The vertical pieces conduct the wind into a narrow space, in which the rotor operates. TSRs are above 1, efficiencies are claimed to be around 40%. Its a bit like a carburettor venturi, where the restriction causes increased velocity and lower pressure. They seem to use 5 or 6 vertical "guides" and they are arranged so that they shield the back of the Savonius vanes, so the wind pressure does not tend to drive them backwards. Using the 5 or 6 guides around the rotor means that they don't have to turn them to face the wind. There has to be something in this development. Megawatt Man |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
I like VAWT's, and I think they have a future once the bugs are sorted out and accepted by the HAWT crowd. I have 2 VAWT's and 2 HAWT's here, and the VAWT's are always running while the HAWT's do nothing. Another one worth looking at is the Ropatec design. There is a 6kw unit at Townsville, Australia. More info here http://www.thebackshed.com/windmill/Articles/TownsvilleStran dWindmill.asp Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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makourain Senior Member Joined: 19/04/2006 Location: Posts: 111 |
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