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Shanders
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Join Date: Jun 2013
Posts: 10

Wind Turbine

06/23/2013 11:17 PM

what is the formula to calculate the number of blades against output power?
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Pathfinder Tags: Wind Turbine calculate
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lyn
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Join Date: Oct 2008
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#1

Re: Wind Turbin

06/23/2013 11:45 PM

1 blade gives one to one power.

2 blades gives 2:1 power.

3 blades gives even more than the first two.

4 blades is pushing it,

5's too many.

Google "wind turbine blade efficiency".

Wind turbine design - Wikipedia, the free encyclopedia
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ronclarke
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Join Date: Nov 2010
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#2

Re: Wind Turbine

06/24/2013 8:42 AM

Jacobs (the inventor of cathodic protection) stated that 3 is optimum.

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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
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#3

Re: Wind Turbine

06/24/2013 2:18 PM

One blade, not very efficient

two blades, 10% more efficient than one blade

three blades, 5% more efficient than 2 blades

tip speed ratio(TSR) = Blade tip speed over wind speed

Ideal TSR is between 6-8 for typical 3-blade industrial wind turbines. In this range, the most possible power is being extracted from the wind.

Example of what happens with blade spin overspeed....

http://www.youtube.com/watch?v=QL-cRuYAxg0

.

.

http://cgcc.us/sites/cgcc.us/files/advising/Wind%20Turbine%20Blades%20-%20102.pdf

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lyn
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Join Date: Oct 2008
Posts: 42355
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#4
In reply to #3

Re: Wind Turbine

06/24/2013 2:26 PM

Very good.

My answer wasn't backed up by a lesson plan.
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