Wind energy

The wind is produced as a result of large movements of air, driven by energy from the Sun. This means that the kinetic energy in wind is a renewable energy resource. As long as the Sun exists, the wind will too.

Wind turbines

Wind turbines use the wind to drive turbines directly. They have huge blades mounted on a tall tower. The blades are connected to a 'nacelle', or housing, which contains gears linked to a generator. As the wind blows, it transfers some of its kinetic energy to the blades, which turn and drive the generator.

A wind turbine. The nacelle turns the blades using a generator. The nacelle and the blades are held up by the tower, and the tower is supported by the foundationThe main features of a wind turbine

Advantages

  • Wind is a renewable energy resource. There are no fuel costs and no harmful polluting gases are produced.

Disadvantages

  • Wind farms are noisy and may spoil the view for people living near them.
  • The amount of electricity generated depends on the strength of the wind. If there is no wind, there is no electricity.
Wind turbines at wind farm
Wind turbines grouped together to form a wind farm