Nacelle (wind turbine)

A nacelle /nəˈsɛl/ is a cover housing that houses all of the generating components in a wind turbine, including the generator, gearbox, drive train, and brake assembly.[1]

Components of a horizontal axis wind turbine (gearbox, rotor shaft and brake assembly) being lifted into the nacelle.
200-ton wind turbine rotor hubs that will be installed at the forward end of the nacelles.

A notable feature now found on some off-shore wind turbines is a large sturdy helicopter-hoisting platform built on top of the nacelle, capable of supporting service personnel and their tools, winched down to the platform from a helicopter hovering above it.[2] Wind turbine rotors are stopped, feathered and locked before personnel are dropped down to or picked up from the platforms.

References
  1. "How Wind Turbines Work". US Department of Energy. 30 November 2006.
  2. Eize de Vries. Close up: Alstom Haliade 6MW Prototype, Windpower Monthly, 11 July 2012.
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