All about Wind Turbines
Wind turbines – converts the energy of wind into kinetic energy- http://en.wikipedia.org/wiki/Wind_turbine
Wind turbines convert kinetic energy in the wind into mechanical power. Wind turbines work almost like a fan. Instead of using electricity to make wind, the wind makes electricity. Wind power is a renewablesource. There will always being wind blowing, therefore we can always have power. Using a wind turbine may be a great way to have energy once fossil fuels are gone. Wind turbines create winds that are free from pollution and have fewer greenhouse gases.

There are two types of wind turbines. These are horizontal also known as the farmer or gardener type and the vertical also known as the egg beater. The Darrieus wind turbine is a vertical axis turbine. It was patented by Georges Jean Marie Darrieus in 1931. Sometimes it consists of a number of aero foils that are vertically mounted on a rotating shaft or framework. Today, we mostly see the horizontal type.

A conventional horizontal axis turbine can be divided into three categories. The first one is the rotor component. This contributes to 20% of the cost. The generator component is about 34% of the cost. The structural support component is about 15% of the cost.

One advantage of the horizontal type is that it allows stronger wind at sites with wind shear. Power is received through the whole rotation because the blades move perpendicular to the wind. Electricity is produced and delivered to almost 390,000 homes in the UK using wind turbines.

One of the disadvantages may be that wind may not blow all the time. Since this is the case, some usehydro power or even natural gas as a backup. Another disadvantage is that wildlife may be put at risk. The point is argued that even though wind turbines produce renewable electricity, birds are put in danger. Owners of wind turbines can actually be prosecuted if their wind turbine harms or kills any birds.

The first known use of a machine being powered by the wind was the windmill of Heron of Alexandria. So as we can see, the wind turbine is not something new. Wind turbines are being used more and more every day. They have proven to be cost effective as well as environmentally friendly. Even with the risk of wildlife, they can now be manufactured to keep the birds from being in any danger. On top of that, wind is a source we will always have.

References

http://www.squidoo.com/informationonwindturbines

http://topics.nytimes.com/top/news/business/energy-environment/wind-power/index.html

http://www.usatoday.com/news/nation/2005-01-04-windmills-usat_x.htm