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Wind Turbine Power
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Wind Turbine Power.
Wind turbine power follows a strict formula but has few variables. . The basic formula to determine power = diameter of rotors x wind velocity3 x ½ air density. The diameter of the rotors is known as the wind swept area and the larger it is, the more electricity can be created, but large blades will not spin as easy in low winds so a happy medium has to be found.
Another factor which determines wind turbine power is the wind speed. The faster the wind the more power can be produced, to a point. Eventually the wind turbine will top out with a maximum power production even as the wind speed increases. The easiest way to increase wind speed without putting a fan in front of the turbine is to simply raise it to a higher level. Wind speeds are much faster the higher the turbine is above the tree line. The only thing limiting height is the price of the tower but they can be well over 500 feet tall.
The air density also affects the wind turbine power. Higher altitudes have less air than lower altitudes. Even with higher wind velocity the turbine may not produce as much power as one at a lower altitude with less wind. In this case the size of the rotors are often increased.
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