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Have you seen those roof ventilators, that spin in the wind & suck air out of the roof system? The bearings often wear out, presumably from excess energy with nowhere to go..
So, the idea is to attach several small vertical-axis wind turbines with generators, to the roof of a house. Charge batteries
for your off-grid system or for emergency power. Decorate your abode & flaunt your green-ness. Let the Jones keep up with that!
Ok Solar
http://www.oksolar....home_wind_large.gif
[skinflaps, Jul 11 2007]
The kind of wind-driven fan you're talking about.
http://www.indiamart.com/realmspl/
Right? [jutta, Jul 11 2007]
Rooftop-mounted turbines in general
http://www.wind-wor...oofTopMounting.html
[jutta, Jul 11 2007]
One recent product in this area.
http://www.renewabledevices.com/swift/
[jutta, Jul 11 2007]
Vertical axis wind turbine
http://club.cycom.co.uk/vertAxis.html
[skinflaps, Jul 11 2007]
Aerotecture
http://www.aerotect.../products_510V.html
[Klaatu, Jul 11 2007]
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Mounting wind turbines on top of roofs is an existing area of research - you can get some products for that, as well as horror stories about vibrations and material fatigue. Integrating turbines with wind-driven fans is new, but I'm not sure it's what you're suggesting! |
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Near where I live, a $15000 wind turbine that, according to the manufacturer, can produce $400 worth of electricity per year was recently placed on the roof of a government building. The purpose of this public-funded folly? To assess its viability. True story. |
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There are a lot of costs involved in generating useful power. Small scale projects represent an admirable attitude, but often do not withstand closer scrutiny. |
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Of course if it was reliable and they placed an order for 500 units which were manufactured in China, it would then cost $5000. |
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Also, remember that 2005 was the year that micro-generation outstripped nuclear power in terms of global output. |
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I think it was manufactured for $5000. The other $10k was for installation and integration with existing electricity supply. |
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Micro generation is often defined as being 100kW or less. That is considerably larger than most domestic systems, and therefore likely to be considerably more worthwhile. |
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