Abstract: There are two primary variants of the wind turbine, the vertical axis wind turbine and the horizontal axis wind turbine. Most large wind turbines are horizontal axis machines but some small vertical axis wind turbines are also popular. The vertical axis configuration is the oldest, historically, and the most striking modern variant is the Darrieus wind turbine. Others include the Giromill and cycloturbine. Vertical axis machines are insensitive to wind direction but are often less efficient than the alternative because the bottom of their blades are close to the ground. The standard wind turbine for wind farms is a three-bladed horizontal axis wind turbine with an upwind rotor mounted on a tubular tower. The rotor drives a generator, often through a gearbox although direct drive systems are becoming more popular, particularly offshore. There is a yaw bearing a motor so that the rotor and nacelle containing the drive train can be kept oriented into with the wind.
Publication Year: 2016
Publication Date: 2016-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 1
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