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Revision as of 20:44, 8 February 2008
, 20:44, 8 February 2008→Installing and Maintaining a Small Electric Wind System
=== Installing and Maintaining a Small Electric Wind System ===
=== Installing and Maintaining a Small Electric Wind System ===
== Wind Power ==
To meet the electricity needs of a power company, a number of large wind turbines (50 kilowatts up to 2 megawatts) can be built close together to form a wind plant. Several power providers today use wind plants to supply power to their customers.
Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator. The blades act much like airplane wings. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade. The low-pressure air pocket then pulls the blade toward it, causing the rotor to turn. This is called lift. The force of the lift is actually much stronger than the wind's force against the front side of the blade, which is called drag. The combination of lift and drag is what causes the rotor to spin.
Wind turbines are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more above ground, they can take advantage of faster and less turbulent wind.
See our [[Directory:Alternate Energy Resources/Wind Power Animation|wind power animation]] for more information.
