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Theory of Wind Power

Theory of Wind Power Points : Theory of Wind Power The power existing in wind can be expressed by the follow formula.
P = 0.5 pAV3
P = power, W
ρ = density of air, kg/m3
A = Active cross sectional area, m2
V = Wind velocity, m/s.

The main difficulty by wind power is to large windmills are necessary for generate power particularly in low wind velocity area. The uneven nature of wind w.r.t. direction with velocity is an extra trouble. For economic practicality of wind electric generation, wind velocity must be in series of 7 in/s to 10 m/s. Though, winds at lesser velocities can function positive displacement pumps to lift water as of wells for domestic use with minor irrigation.

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