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Author Topic: A New Type of Wind Turbine/Generator  (Read 14950 times)

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Offline Bill Quick

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A New Type of Wind Turbine/Generator
« on: September 19, 2011, 08:04:16 PM »
[img width= height=]http://www.popsci.com/files/imagecache/article_image_large/articles/PSC0911_WN_121.jpg[/img]

A Personal Turbine Makes Your Rooftop Into a Wind Farm | Popular Science
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Offline CERDIP

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Re: A New Type of Wind Turbine/Generator
« Reply #1 on: September 20, 2011, 12:02:11 AM »
Yup this definitely qualifies as a Step In The Right Direction.
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Offline Langenator

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Re: A New Type of Wind Turbine/Generator
« Reply #2 on: September 20, 2011, 08:40:36 AM »
I think I first saw this thing a couple of years ago, although it looks like they've refined it a good bit.

As long as you don't have an HOA...

Offline Drang

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Re: A New Type of Wind Turbine/Generator
« Reply #3 on: September 20, 2011, 12:28:44 PM »
A Savonius-style vertical-axis turbine is better than any horizontal-style machine in a lot of ways, but the fact this can be roof-mounted is a huge advantage.
« Last Edit: September 20, 2011, 12:30:52 PM by Drang »
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Offline Langenator

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Re: A New Type of Wind Turbine/Generator
« Reply #4 on: September 20, 2011, 01:17:03 PM »
This site shows you how to make a Savonius type from 55-gallon drums.

Now...is there any reason you couldn't combine the best features of both designs?  Use the vertical scoop of the Savonius, but instead of a shaft attached to a conventional generator, have rings of magnets and coils, like the Honeywell design, at the top and bottom?

(I hope that picture is clear in ya'll's heads.)  I'm a historian/strategist, not an engineer.  Any engineers out there want to tell me if my idea would be feasible?

Offline Bill Quick

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Re: A New Type of Wind Turbine/Generator
« Reply #5 on: September 20, 2011, 01:18:05 PM »
Drang, the advantage here over the Savonious is that the fan is the generator.  The Savonious still has to turn an alternator, and is far less efficient.  At least that's the way I understand it.
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Offline Bill Quick

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Re: A New Type of Wind Turbine/Generator
« Reply #6 on: September 20, 2011, 01:19:20 PM »
I don't even need to build one (Savonius).  The junkyard half a mile from my place has two of them for sale.  I have looked into their efficiency, though, and I'm not especially impressed - particularly for my location.

One other thing:  They have one - a single split 55 drum (the other is a double, twice as tall) - mounted on top of a shed.  Aside from being butt ugly, it makes a lot of noise in operation.
« Last Edit: September 20, 2011, 01:30:25 PM by Bill Quick »
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Offline Bill Quick

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Re: A New Type of Wind Turbine/Generator
« Reply #7 on: September 20, 2011, 01:28:48 PM »
Here's a Windtronics company video.  I'm not sure that you couldn't build one of these puppies for yourself....

"You can get a lot farther with a kind word and a gun than a kind word alone."  --   Al Capone

Offline Drang

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Re: A New Type of Wind Turbine/Generator
« Reply #8 on: September 20, 2011, 02:54:22 PM »
Drang, the advantage here over the Savonious is that the fan is the generator.
I got that, and it can be a very big advantage.
The Savonious still has to turn an alternator, and is far less efficient.  At least that's the way I understand it.
One big advantage of a Savonius wind turbine is that it will start generating at very low wind speeds; unlike the Darius style vertical axis windmill, it should not need to be "push started" at very low speeds.  It will, however, "max out" at a lower speed than other designs. 
Another disadvantage is that they are very tall, and cannot be roof-mounted.
If factory-manufactured (i.e., not out of split 55 gal. drums) they are practically silent.  I suggested to a factory rep that he should try selling them to HOAs as "kinetic sculpture with benefits", since HOAs are usually as fond of wind generators as they are of amateur radio antennae...

There are trade-offs with all these designs.  Efficiency v cost v cost-effectiveness v footprint/size-and-space consideration v maintenance v ...
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