Is there anyone who knows how to do this problem? This is part of an assignment

Question

Is there anyone who knows how to do this problem? This is part of an assignment for my Power Electronics course and I really need help! Here's how it work's:

According to the American Wind Energy Association (http://www.awea.org), the total amount of electricity that could potentially be generated from wind in the United States has been estimated at 10.8 x 109 MW-hrs annually. If one-tenth of this potential is developed, estimate the number of 1.5 MW windmills that would be required, assuming that on average a windmill produces only 30% of the energy that it is capable of.

Explanation / Answer

Capacity factor = 30% = 0.3

Total energy produced by one 1.5MW plant in one year = 1.5 *0.3* 24 *365 = 3.942 * 103 M Wh

No of wind plants = (10.8 x 109 )/(10*3.942 * 103) =273972.6 = 273973 plants

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