What is Wind Energy?
The terms "wind energy" or "wind power" describe the process by which the wind is used to generate mechanical power or electricity. Wind turbines convert the kinetic energy in the wind into mechanical power.
This mechanical power can be used for specific tasks (such as grinding grain or pumping water) or a generator can convert this mechanical power into electricity to power homes, businesses, schools, and the like.
Wind is a form of solar energy.
Winds are caused by the uneven heating of the atmosphere by the sun, the irregularities of the earth's surface, and rotation of the earth. Wind flow patterns are modified by the earth's terrain, bodies of water, and vegetative cover. This wind flow, or motion energy, when "harvested" by modern wind turbines can be used to generate electricity.
Wind turbines, like aircraft propeller blades, turn in the moving air and power an electric generator which supplies an electric current.
Modern wind turbines fall into two basic groups; the horizontal-axis variety, like the traditional farm windmills used for pumping water; and the vertical-axis design, like the eggbeater-style Darrieus model, named after its French inventor.
Modern wind technology takes advantage of advances in materials, engineering, electronics, and aerodynamics. Wind turbines are often grouped together into a single wind power plant, also known as a wind farm, and generate bulk electrical power. Electricity from these turbines is fed into the local utility grid and distributes to customers just as it is with conventional power plants.
Benefits of Wind Energy
Enviromental
Social and Economical
Wind Energy in the United States
The U.S. wind industry broke all previous records by installing close to 10,000 megawatts of new generating capacity in 2009 thanks to Recovery Act incentives.
The total installed capacity in the U.S. is now over 35,000 MW. In 2009, 38
manufacturing facilities were brought online, announced or expanded.
Development of Wind Power Energy Capacity
in the United States from 1999 to 2009
Wind Resources and Transmission Lines
in the United States
Texas Wind Energy Farm
Texas Wind Energy Farm
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