Wind Power Calculator for iOS

Wind Power Calculator can be used to calculate available power from a windmillAvailable power in the wind can be expressed as Pa = 1/2 A v3 where P = power (W) = density of air (kg/m3) = efficiency of the windmill (in general less than 0.4, or 40%) A = area wind passing through perpendicular to the wind (m2) v = wind velocity (m/s)Be aware that the density of air decreases with temperature and altitude and that the major factor in power generation is wind velocity. a 20% increase in the wind velocity - increases the power generated with 73% The energy generated by a windmill depends on the power generation as indicated above - and how often, or how many hours the wind blows - or more scientifically - the "wind speed frequency distribution" at the actual location.The total energy generated over a year can be calculated by summarizing the power generation for all velocities (ranging from the actual windmill cut-in speed to the shut-down speed) multiplied with the no. of hours the wind blows at the actual speeds.