
Wind Energy is the product of converting the kinetic energy in wind into other forms of energy using particular wind machinery.
The wind force, captured by the blades on windmills, was the first source of renewable energy used by humankind: currently wind energy is the most promising renewable source in development and it already affects, to some extent, electricity generation in many countries.
As a matter of fact, wind installed worldwide has reached a total of 196.630 MW of power and in 2011 new wind farms were planned for a total of 45 GW. Also the wind market, above all internationally, is flourishing by virtue of a round of investments in 2010 of Euro 40 billion. Italy, with its 5.797 GW of wind power installed in 2010, is ranked at sixth place in the world for the cumulative power installed.
The most common and powerful wind machinery used is the horizontal axis wind turbine. It has a main rotor shaft and blades (in general 3), inserted into a rotor hub, which it is linked to the electrical generator. The tower supports the hub, and the distance in height from the ground, depends on the diameters of the blades and, therefore, the power of the installation itself.
The farm in Bisaccia, with its horizontal wind turbines with 3 MW of power, makes use of the most modern technology, which takes advantage of the results by advanced research in materials; to reduce the weight of an installation and on the aerodynamic and fluid dynamic aspects and to produce new winged designs capable of converting, even more efficiently, the force of wind into electricity.
The components of a wind turbine:





