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An example of a wind turbine, this 3 bladed turbine is the classic design of modern wind turbines Wind turbine components : 1-Foundation, 2-Connection to the electric grid, 3-Tower, 4-Access ladder, 5-Wind orientation control (Yaw control), 6-Nacelle, 7-Generator, 8-Anemometer, 9-Electric or Mechanical Brake, 10-Gearbox, 11-Rotor blade, 12-Blade pitch control, 13-Rotor hub
Before developers construct a wind farm, they first measure the wind resource on a prospective site by erecting temporary measurement towers.Typically these mount anemometers at a range of heights up to the hub height of the proposed wind turbines, and log the wind speed data at frequent intervals (e.g. every ten minutes) [6] for at least one year and preferably two or more.
Offshore wind turbines are built up to 8 MW today and have a blade length up to 80 meters (260 ft). Designs with 10 to 12 MW were in preparation in 2018, [45] and a "15 MW+" prototype with three 118-metre (387 ft) blades is planned to be constructed in 2022. [needs update] [46] The average hub height of horizontal axis wind turbines is 90 ...
Liberty Wind Turbine uses an 80 meter tall tower as a standard in its design. The rotor diameter varies amongst particular versions of turbines. The diameter for version C89 is 89 meters, 93 meters for version C93, 96 meters for version C96, and 99 meters for C99. Blade lengths are 43.2m for C89, 45.2m for C93, 46.7m for C96 and 48.2m for C100.
The power coefficient, , expresses what fraction of the power in the wind is being extracted by the wind turbine. It is generally assumed to be a function of both tip-speed ratio and pitch angle. Below is a plot of the variation of the power coefficient with variations in the tip-speed ratio when the pitch is held constant:
The list includes wind turbines with a power rating that is within 5 MW of the current most powerful wind turbine that has received customer orders that is at least at the prototype stage. All the most powerful turbines are offshore wind turbines. This list also includes the most powerful onshore wind turbines, although they are relatively ...