December 01, 2008
Turbine With Shroud Could Cut Wind Power Costs In Half

A shroud that reduces loss due to wind going around the blade might cut total costs of wind power by half or more.

FloDesign Wind Turbine, a spin-off from the aerospace company FloDesign based in Wilbraham, MA, has developed a wind turbine that could generate electricity at half the cost of conventional turbines. The company recently raised $6 million in its first round of venture financing and has announced partnerships with wind-farm developers.

So far the company has only a small prototype. They need to do a lot of work to show it can scale and that the net cost really is lower. But if it works it will allow much more wind power to be tapped per area of land.

Combine that advance with the prospect of an electric generator that can generate electricity over a wider range of air speeds and we might be looking at much cheaper wind power that operates over a wider range of wind speeds.

Share |      Randall Parker, 2008 December 01 11:07 PM  Energy Wind

Stephen Rose said at December 2, 2008 7:56 AM:

Thanks. Just found this in a current search for sites worth linking to. Noted this post.

Randolph Palmer said at December 2, 2008 3:14 PM:

Yes indeed. And under the Obama and Pelosi government, a hot wind will be constantly blowing out of Washington, DC, to all points of the compass, just waiting to be tapped by low cost, highly efficient wind turbines! And really now, people, all we needed was a wind that always blows to make wind power economical and reliable. Hey! A sun that always shines would help too! Er, Mr. Obama, sir?

Engineer-Poet said at December 2, 2008 5:31 PM:

Dang, this idea goes back a long way.  It was big during the 70's energy crisis, if not before.

Still a bad idea for big turbines, because a big, heavy fixed shroud is more costly and troublesome than the loss of efficiency from air going around blade tips.  There's a size limit where turboprops are better than turbofans, too.

Fat Man said at December 2, 2008 8:41 PM:

I hate to repeat myself, but, without knowing the cost of energy storage and transmission, we are not getting anything like the true cost of using wind or solar, both of which are unevenly distributed in time and space.

TH said at December 3, 2008 4:25 PM:

Poet, we now get 2/3rds of 1% from wind energy now, that doesn't even replace 1 coal plant, we got 10,000 of these stupid things spread all over the place. I would think a better response from an engineer would be these things will never work. Can you imagine wiring all these things up when they start putting them willy nilly all across the land of hope and change and getting a whopping 2% for all the effort? The poet part of your name I can believe, the engineer part is a bit of a stretch.

Engineer-Poet said at December 9, 2008 9:56 AM:
Poet, we now get 2/3rds of 1% from wind energy now, that doesn't even replace 1 coal plant
Total wind generation in 2007 was 32.1 billion kWh, or 3.66 GW average.

The US has about 1493 coal-fired generators, which turned out 2020.6 billion kWh in 2007 or an average of 154 megawatts each.  Therefore, last year wind power replaced the energy from almost 24 average coal-fired plants.

You fail.

BBM said at December 9, 2008 12:57 PM:

154 mw does seem small for a coal plant, at least as an average.

I wonder what the median number is.

Donald Goudriaan said at February 28, 2011 11:17 AM:

spailcraft is ''speed sailing'', but then, with machines. such a thing of a shrouded wind turbine is, a better wind turbine / wind mill configuration. the extra is procentually graduated. it can go up to the speed of sound limit, and beyond; the speed by using sails. just hold the blade firm and direct the speed half on the incoming wind. stable speed sailing machines first led to wind surfer related vessels for over water and evolved later into a firm / rigid / monolithic / out of one piece frame wherein then the ring with blades moves / spins. this lead to wind turbines with a ring for the centre of the dynamo. the ring diameter is the outer span of the blades plus a bit. the ring is the construction that hold the blades and the ring is the centre of the dynamo. equipped as a dynamo, using storms, with wind speeds up to ten times faster than average winds, the ring - 20 meters diameter - generates 1000 times more energy! 10 times faster means 10, in the third, more energy. this means that we can make a storage pile of pre fabricated hydrogen during high winds and storms. this means that if you are, you go with it. liquid hydrogen, plus storms, plus stable speed sailing machines are solving the energy problem. e = 1 / 2 m v^2 [mass kg vitesse m/s] mass, is mass ring. v is v ring.

no one has ever dreamed of his / hers mill not getting broken down during the highest wind. more wind, morte speed more power.... too much power, does it wnat to turn too fast? then.. more resistance to make more energy out of the turning motion of the ring. no fiction. taming storms is easy, with a ring that holds the blades

wind surfing located the way: not the axle. a ring is not an axle. a ring is a new gift is the struggle to tame earth.

making is magnetizing the ring in the housing so that it makes electric current.

the problem now is how to fil enough hydrogen containers during storms and high winds too.

spailing machines save the planet. it is the time for using the what we have. spailing is windsurfing with machines, and windriaan turbines are sailing boats on a ring, going half wind, to the maximum speed. stable sailing means that the sailing construction is not able to get broken by the wind.

donald goudriaan

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