Wind Energy





Wind Energy:
Wind energy is an environmentally, clean and inexpensive source of electric power. When using wind turbines we are able to harness the power of the wind and convert it into electricity for use in our homes. Wind energy is energy from moving air.This happens from the heating and cooling of the Earth. Its usually turned into useful energy by the action of wind currents on moving surfaces like the sails of a ship or the blades of a windmill. Wind energy is one of the oldest forms of energy used to supplement human muscle.

The wind part of it:
Wind is basically air in motion. It is caused by the uneven heating of the Earth's surface by the sun. Since the Earth's surface is made of very different types of land and water, it absorbs the sun's heat at different rates.

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How do you Create Wind energy- Wind turbines
Wind turbines use the energy of moving air to spiin its blades, which are connected to a generator.
The full amount of energy a wind turbine produces depends on how fast the wind is blowing. The minimum for a power generator is 10 km per hour.

Typically, a large number of turbines are connected to create wind farms capable of powering large numbers of buildings, but there are smaller single turbines available that you can place in your garden and use to power certain aspects of your home.

How do Wind turbines work:

Wind Turbines use blades to collect the wind’s kinetic energy. The wind flows over the blades creating lift, like the effect on airplane wings, which causes them to turn. The blades are connected to a drive shaft that turns an electric generator to produce electricity. There are two basic types of wind turbines – the first one is a 2-blade horizontal axis turbine that spins downward and faces away from the wind, the second is a 3-blade horizontal axis turbine that spins upward and faces into the wind. Both are mostly used today.

Positive:
  • Does not produce greenhouse gases
  • Farming and grazing can continue on landwhere wind turbines are located

Negative:

  • Wind does not always blow or remain constant
  • Wind turbines can bring barriers to bird movements
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How its better than other forms of power:

Wind energy is better than all other sources of energy because its cheap and people have been using it for thousands of years. Wind is a clean fuel; wind farms create no air or water pollution because no fuel is burned to generate electricity its all natural. Its easy to use so not much work will be done. In other word Wind energy is better than the rest.



Bibliography:


http://www.canwea.ca/wind-energy/index6_e.php
http://www.ftexploring.com/energy/wind-enrgy.html
http://environment.about.com/lr/wind_energy/136609/1/
http://tonto.eia.doe.gov/kids/energy.cfm?page=wind_home-basics