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Forum Index : Windmills : just another dumb question

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azcity
Newbie

Joined: 31/03/2007
Location: United States
Posts: 9

Posted: 12:50pm 01 Apr 2007

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Increasing rpm via larger to smaller pulley. Why is it not done on small units? I understand that the use of bearings and a belt increase the amount of torque needed to turn the windmill to start it but if you were using a 1 to 3 ratio ( number out of the air) in higher winds of say 15 mph wouldn't the extra speed of the generator produce twice as much power?

vasi

Guru

Joined: 23/03/2007
Location: Romania
Posts: 1697

Posted: 06:46pm 01 Apr 2007

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If we wait for higher winds, our batteries can be in danger. We don't have higher winds all the time, and we are connected mainly to batteries, not to windmill.Edited by vasi 2007-04-03

Hobbit name: Togo Toadfoot of Frogmorton
Elvish name: Mablung Miriel
Beyound Arduino Lang

wind-pirate

Senior Member

Joined: 01/02/2007
Location: Canada
Posts: 101

Posted: 03:28am 02 Apr 2007

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Great idea!!
If you are using a large turbine "blades" and lots of wind. Low winds have little to no power, so you must use the most efficent turbine you can make. If you used
belt(s)to drive your generator you will need a great amount of wind just to get it to turn. "Belts need about 15 percent of the wind power just to get them to moving".

If you live in windy area then it would not matter that much.

THE Pirate.
stealing wind & solar energy is fun

vasi

Guru

Joined: 23/03/2007
Location: Romania
Posts: 1697

Posted: 05:03am 02 Apr 2007

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Here is Arizona Wind Power http://www.eere.energy.gov/windandhydro/windpoweringamerica/ images/windmaps/az_50m_800.jpg

Or start from here http://www.windenergy.com/united_states_frame.htmEdited by vasi 2007-04-03

Hobbit name: Togo Toadfoot of Frogmorton
Elvish name: Mablung Miriel
Beyound Arduino Lang

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