2. Introduction
• Wind power is the conversion of the energy in wind into a more
useful form of energy, like electricity. It is a renewable source of
energy that helps to cut down on the pollution of earth's air.
• At the end of 2009, wind power supplied about 1.3% of the world's
electricity consumption. Wind power is widely used in European
countries, and more recently in the United States and Asia. In 2012
wind power accounted for approximately 30% of electricity
generation in Denmark, 20% in Portugal and 18% in Spain
3. How it works
• Wind power stations use the wind to turn a turbine which turns a
magnet inside a coil (a type of generator). The wind has kinetic
energy (movement energy) which is changed into mechanical energy
by the blades on the turbine. The turbine then turns a generator
which creates electrical energy (voltage). The turbine is usually
connected by a gearbox to help control the speed it turns the
generator at.
4. Uses
• Wind Power Stations have the advantage over Fossil Fuel Power
Stations as they do not produce any greenhouse gases such as carbon
dioxide or water vapour. They also do not produce gases that help
make acid rain such as sulfur dioxide.
5. shortcomings
• Wind Power Stations have to be carefully placed. They must be in
positions where there is a constant, steady supply of wind. In fact, the
wind must not become too strong or it may damage the turbine.
Because wind is unpredictable, so is the amount of power that wind
turbines will produce, making them an unreliable source of energy.
Some people also consider wind turbines to be ugly and unsightly.
• wind
