What type of energy does wind contain?
Kinetic energy.
What does a wind turbine convert kinetic energy into?
Mechanical work → electricity.
Onshore wind turbines are installed where?
Steppes, mountains, coastal areas.
Main advantage of offshore turbines?
Strong, stable winds.
What does HAWT stand for?
Horizontal Axis Wind Turbine.
What does VAWT stand for?
Vertical Axis Wind Turbine.
Which turbine type is most efficient?
HAWT.
Which wind engine type uses drag?
Drag-based engines (oldest type).
Which wind engine type uses lift?
Lift-based engines (propeller type).
What material are blades made of?
Fiberglass reinforced plastics and epoxy laminates.
What does the yaw mechanism do?
Turns the rotor to face the wind.
What is the purpose of the gearbox?
Increase rotor speed for the generator.
When do turbines shut down?
Above 25 m/s wind speed.
What device cannot fully stop the turbine?
Airbrake.
What is added in stand-alone systems for autonomy?
Batteries.
Above 50 kW, turbines are connected to what?
The electricity grid.
What controls power output in strong winds?
Pitch control (rotating blades).
What device allows variable speed operation?
Frequency converter.
