The Power Of Wind Energy Essay

The Power Of Wind Energy Essay

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Wind energy is one of the many currently available renewable energy sources, meaning that it is a resource which can be used repeatedly because it is replaced naturally. Early recorded history shows that people used this form of energy to propel their boats since 5,000 B.C. Later China used windmills to pump water by 200 B.C., and Persia used windmills to grind grain and pump water about 500-900 A.D. Eventually the windmill lead to the creation of the first wind turbine, invented in 1888 in Cleveland, Ohio, by a Scottish scholar named Charles F. Brush [1]. A wind turbine is a device that converts kinetic energy gained from the wind into electrical energy [2], and a collection of wind turbines in one place is referred to as a wind farm. Today, wind energy contributes only 4.7% of the energy generation in the United States, but the Department of Energy predicts that the percentage will increase to 20% by 2030. Thus, a career in wind energy seems like a good choice for mechanical engineers.
The two main types of wind turbines are the horizontal-axis wind turbines and the vertical-axis wind turbines. The horizontal-axis wind turbine (HAWT), whose rotating axis is horizontal and thus parallel to the ground, is the most common type because it has a higher efficiency. The second type is the vertical-axis wind turbine, whose rotating axis is vertical and thus perpendicular to the ground. Vertical-axis wind turbines (VAWTs) are mostly used in smaller wind projects and in residential applications. Its main advantages are that it does not have to be pointed towards the wind and can operate on lower wind speeds. Both designs have similar components. For example, both types have rotor blades that rotate when wind blows over them and cause the ...


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...ent of Energy released a report titled 20% Wind Energy by 2030: Increasing Wind Energy’s Contribution to U.S. Electricity Supply that examined the costs, major impacts, and challenges posed by the production 20% of the national energy demand by 2030 using wind energy.
An energy source that is promising for mechanical engineers is wind energy. It is has shown an average increase of 30% annually in the United States, and the U.S. Department of Energy projects that wind power can supply 20% of our country’s electricity by 2030. The future is bright for wind energy. Trends show horizontal-axis wind turbine diameters getting larger every year, while smaller vertical-axis wind turbines are being produced for residential usage. Finally, the future holds that there will be more offshore wind farms in the coast of our country because winds are higher speed and more steady.
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