Wind turbines

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The wind turbine generator or aero-mechanical device is that converts wind energy into electricity, ie, converts the energy of wind movement (kinetic energy) into mechanical energy by moving a shaft (rotor). 

Then through the turbine mechanical energy into electricity becomes. The energy produced may be used directly or stored in batteries. The efficiency of these devices can reach 40%.

1. https://www.textoscientificos.com/energia/turbinas