Electric Energy from the Wind

Atanaska Toneva

Abstract

Wind is one of the renewable energy sources that may bring to decreased fossil usage and, hence, to diminished carbon oxide emissions in the atmosphere.

Wind mechanical power conversion by a wind generator is based on the Bettss law. The maximum power depends on the wind velocity third degree of and on the turbine blade diameter second degree. To further increase the power turbines of increasingly large blade diameters are produced and of higher towers, respectively.

Modern wind turbines are started at wind velocity higher than 3 m/sec and they are efficiently working up to a velocity of 25 m/sec. The blades are made of fibre-glass which avoids telecommunication interference and the construction guarantees a noise level lower than 40 -60 dB at a distance of 40 m from the tower basement.