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Debera Harward
User Rank
Silver
Re: Where are the turbines in the picture?
Debera Harward   4/25/2013 5:48:35 PM
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William , Everything agreed but what i think is there will be one drawback i.e absence of wind,It wont be able to produce energy in the areas where there is no wind ,This technology is usefull for only places where there is lot of wind

Debera Harward
User Rank
Silver
Re: Where are the turbines in the picture?
Debera Harward   4/25/2013 5:48:29 PM
NO RATINGS
William , Everything agreed but what i think is there will be one drawback i.e absence of wind,It wont be able to produce energy in the areas where there is no wind ,This technology is usefull for only places where there is lot of wind

William K.
User Rank
Platinum
Where are the turbines in the picture?
William K.   4/25/2013 4:41:49 PM
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If the wind turbine is a horizontal axis device that looks a bit like a centifugal blower, then it certainly would be much less visible, and it might be less efficient as well. But wind is free, it is only the ROI that pushes for capturing the very most energy possible, disregarding appearance end everything else. A horizontal axis barrel-shaped turbine could be supported on both ends, making the structure easier to design, and allowing for a simpler suport arrangement. In addition there is that very real effect of tall buildings channeling the wind into high speed jetstreams, which might be used to an advantage in this application. 

But the very biggest advantage would be that the energy is being recovered in the area where it is needed, which would reduce the transport costs a lot.

pnadams
User Rank
Iron
Re: Done before...
pnadams   4/25/2013 1:51:47 PM
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Can you post a link or URL?

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.

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.

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.

pnadams
User Rank
Iron
Done before...
pnadams   4/25/2013 8:35:08 AM
NO RATINGS
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.

tekochip
User Rank
Platinum
Re: for the birds
tekochip   4/25/2013 8:26:05 AM
NO RATINGS
That's quite a few moving parts, I'll bet it makes a bunch of noise.

far911
User Rank
Silver
Re: for the birds
far911   4/25/2013 2:42:42 AM
NO RATINGS
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. 

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