![]() ![]() Generators convert rotational to electrical energy.In practice the maximum efficiency obtainable at optimal rotation speed (the aerodynamic power coefficient) is nearer 35% (or 0.35) with efficiency dropping off either side of that speed. The efficiency of the turbine is determined by the design of the rotor blade.The law states that a design can only convert a maximum of 59% of the kinetic energy in the wind to mechanical energy. The maximum efficiency of a turbine in capturing energy from the wind is determined by Betz’ Law.This should be considered when examining manufacturers’ output claims. note that the area is not necessarily linked to the size of the generator – the generator cannot generate more power than the rotor can capture.The swept area of the rota determines the energy capture of the turbine. ![]() Worse, they can seriously contribute to mechanical failure. Gusts of wind can move a turbine (yaw) erratically around its axis but do little to generate power. Conventional turbines need to turn into the wind to function.
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