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Wind turbine electricity generation

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Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 50 meters and a wind-conversion efficiency of 25 percent. The turbine operates in an area with an average wind-power density of 500 watts/sq meter at 50 meters altitude. How much electricity (kWh) can the turbine generate per year? Wind densities greater than or equal to 500 watts/sq meter at an altitude of 50 meters are present on 1.300 percent of the land area of the US. If, on average, wind farms contain 8 turbines/sq km, how much electricity (kWh/yr) could be generated from these wind turbines? (The area of
the US is 7,827,989 sq km).

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Solution Summary

This solution looks at the electricity generated by a wind turbine and the total potential energy that can be generated by wind turbines in the US. It calculates the electricity in kWh generated in one year.

Solution Preview

Rotor diameter = 50 m --> rotor radius = 50/2 = 25 m.
The rotor area = 3.14 * (25m)^2 = 1,962.50 m^2
Average power generated is ...

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