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Wind Power in a Low Wind Area  RSS feed

 
                                                                    
Posts: 114
Location: Nashville, Tennessee, USA
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In Nashville we are among the lowest rated wind area.
So they say.
We are rated 2 out of 6.

But my new creation is spinning.
Where there is motion there is electricity.
The wingspan is about 12 feet.

We have a sawmill and plenty of yard logs.
The cost to build this model is about $30.
There are two sealed bearings and two metal rods that I purchased.

I am considering attaching a generator to the bottom of this but do not know what type of generator/PMA to use.  It spins slowly and intermittently.  Maybe we are getting 60 rpm so I think I will need a large pully and a small pulley on the PMA.  These motors are expensive so I don't want to do a lot of trial and error.

Any ideas welcome.




windmill.jpg
[Thumbnail for windmill.jpg]
 
                        
Posts: 278
Location: Iowa, border of regions 5 and 6
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Do a Google search for "Vertical Axis Wind Turbine" or "Vertical Wind Generator".  Since a vertical turbine spins slower than your typical wind turbine, it takes special generators to get electrical energy out of them.  If your blades are spinning slowly, that might be the solution for you.
 
                                                                    
Posts: 114
Location: Nashville, Tennessee, USA
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Thanks for the ideas.
I found this one:
http://www.hurricanewindpower.com/servlet/the-Hurricane-Wind-Generators/Categories
 
                
Posts: 44
Location: West Coast of Canada
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Nice looking windmill.

Bear in mind that your "spinning slowly" right now is with no load.  As soon as you add a load of any kind, it will spin much slower.  Trying to turn over a pulley system and a generator even with no electrical load will slow it down considerably.  When you connect some current-drawing electrical devices to it, it will slow down even more. 

It's not so much RPMs that matter but Watts.  60 RPM with no load except a couple of bearings is practically no Watts at all.  Pulleys can multiply your RPMs, but they will actually reduce the number of Watts available for electricity generation, due to friction.
 
Emerson White
Posts: 1206
Location: Alaska
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There are lots of things you can technically do, but that doesn't make them ecologically or economically rewarding. Windmills are cool, and I'm sure it will be fun to look at, but I wouldn't expect any warm showers or reading lights out of it.
 
George Sevkic
Posts: 2
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In my humble opinion, the link below is a nice DIY solution.
http://www.youtube.com/watch?annotation_id=annotation_806758&feature=iv&src_vid=1QTWTTGXfL0&v=mXTitm0hxM4
 
Dave Turpin
Posts: 112
Location: Groton, CT
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Easy test: try to stop your turbine from spinning. If it fails to break your arm, there is not enough wind power to be useful.

Far too often I see people completely ignore the three fundamentals of wind power:

1) you need a high average windspeed, 10m/s or more.
2) you need unobstructed flow (a wide open space)
3) you need to get the turbine up in the wind (20m tower or more)

If you don't have these things even a professionally built 5kW turbine will end up producing a tiny fraction of what it is rated for.

 
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