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Rob Spiegel
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Blogger
Wind keeps developing
Rob Spiegel   4/24/2013 9:54:31 AM
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Nice story, Elizabeth. Interesting that wind could deliver half the world's energy needs by 2030. I'm sure that would require advances in technology. This window-based energy collector may be a contribution to that.

NadineJ
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Platinum
for the birds
NadineJ   4/24/2013 11:04:05 AM
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This is very cool.  When I looked at the picture, the first thing I thought was "what about the birds?"  Not only could the birds get hurt/killed but they could also damage the turbines.

Is there any info yet on how that would be solved?

Mydesign
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Platinum
Hybrid Mode with Windmill
Mydesign   4/25/2013 1:20:10 AM
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"You don't normally find a wind turbine in the middle of a large metropolitan area, .......... has developed a wind turbine that can be positioned between, or atop, skyscrapers and large buildings to harvest wind areas in urban areas."

Elizabeth, but in my country we can see small wind mills over most of the buildings as a part of hybrid power generator. They used to install small turbine type windmill (hybrid mode) along with solar panels to generate power.

Mydesign
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Platinum
Re: Wind keeps developing
Mydesign   4/25/2013 1:23:43 AM
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Rob, but windmills may not be suitable for all cities or places. I my place we had implemented wind farms at certain areas, where wind is available atleast for 200 days/year. Other areas EB (Electricity Board) has instated solar panels for power generation. In certain places, they had implemented hybrid model, consisting of both windmill and solar.



far911
User Rank
Silver
Re: for the birds
far911   4/25/2013 2:42:42 AM
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Nadine I think they will not leave the turbines naked to the environment, they may shield them using netted steel sheets in order to prevent accidents as well as to maintain smooth operation. 

tekochip
User Rank
Platinum
Re: for the birds
tekochip   4/25/2013 8:26:05 AM
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That's quite a few moving parts, I'll bet it makes a bunch of noise.

pnadams
User Rank
Iron
Done before...
pnadams   4/25/2013 8:35:08 AM
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This has be done before it's commonly referred to the 'ladder mill'. Or, maybe I should say it has not been done, but has been patented several times as far back as 1972. The reason it has not be done, is because it's not an efficient way to extract power from air flow.

If you were going to spend money to extract power from air flow, you would compare this to a rotating blade an see that the return on investment dictated a rotating blade. Then you might think about a vertical axis wind turbine and see that the return on investment dictated a horizontal axis wind turbine. You might think about putting a shroud, end plates, funnels, or whatever on your wind turbine and find that it would be much cheaper to simply extend the blades a little longer.

There is a reason all wind turbines look pretty much alike, the laws of physics and economics dictate how they look.

DB_Wilson
User Rank
Gold
Concrete Canyons
DB_Wilson   4/25/2013 8:41:18 AM
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This may be very good in the concrete canyons in many large cities.  The channelling effects of the buildings will raise the wind speeds.  The channeling may help with the inability to turn the generator to face the wind.  This generator may be less of a problem with bird strikes than the rotating propeller type turbines.

rainmaking
User Rank
Gold
Re: Done before...
rainmaking   4/25/2013 12:46:37 PM
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pnadams-

You are probably right with almost all of your comments, but not so much in the case of the vertical axis turbine. Our pitch-controlled vertical machine has a Cp higher than any traditional horizontal-axis turbine commercially available. It is also quieter, more bird friendly, and easier on the eyes than traditional machines. Unfortunately we only make a 70kW version at the moment.

Rob Spiegel
User Rank
Blogger
Re: Wind keeps developing
Rob Spiegel   4/25/2013 1:43:57 PM
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Good point, My Design. Do you know what cities may be good choices for wind energy? Here in Albuquerque, we have a windy spring, but I don't believe we top 200 windy days. The need for consistent wind could create barriers to wind energy collection.

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