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Humans have been using wind-power for at least 5,500 years to propel sailboats and sailing ships, and architects have used natural ventilation in buildings since similarly ancient times. The Babylonian emperor Hammurabi planned to use it for his ambitious irrigation project in the 17th century BC.
Wind energy can be converted into a useful form, such as electricity, using turbines. It’s use has grown at an average 30% annually over the past five years, establishing it as the world’s fastest-growing energy source. Happily it produces no pollutants or emissions during operation. It is one of the cleanest sources of energy available.
The turbine is the modern counterpart of the windmill. Because it is a free, renewable resource, no matter how much is used today, there will still be the same supply in the future.. The most common way of getting energy in this way is through setting up ‘Wind-farms’. Turbines convert the harnessed kinetic energy into mechanical power. These farms can be costly to maintain and electricity produced by this method is more expensive than that produced by other means. However, it is a clean, inexhaustible, indigenous energy resource that can generate enough electricity to power millions of homes and businesses.
Because instantaneous electrical generation and consumption must remain in balance to maintain grid stability, this variability can present substantial challenges to incorporating large amounts of wind-power into a grid system.
The power is proportional to the cube of the air speed, so relatively minor increases in speed result in large changes in potential output. One disadvantage is that it cannot be stored (although generated electricity can be stored, if batteries are used), and not all winds can be harnessed to meet the timing of electricity demands. Generating this power teamed with hydroelectric generators is attractive because the water can be used for energy storage, and operation with underground compressed-air storage is another option.
Speed
To be worthwhile, you need an average air speed of around 25 km/h. In particular geographic regions, peak speeds may not coincide with peak demand for electrical power. In California and Texas, for example, hot days in summer may have low air flows and high electrical demand due to air conditioning. In the UK, demand for electricity is higher in winter than in summer, and so are wind speeds.
Conclusion
There are now many thousands of these turbines operating, with a total capacity of 73,904 MW of which this form of power in Europe accounts for 65% (2006). As of 2008, Europe leads the world in development of offshore power generators, due to strong wind resources and shallow water in the North Sea and the Baltic Sea, and limitations on suitable locations on land due to dense populations and existing developments.
As we can see it is beginning to grow in popularity because it is cheap, inexhaustible, clean, eco-friendly, abundant, and widely distributed. It is a renewable energy source that has virtually no environmental problems. Globally, this means of power generation increased more than fivefold between 2000 and 2007 it plays a significant part in our quest to find renewable and affordable energy. You can have your own solar or wind-power system setup for $200 or less
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