The group Wind Turbine Introduction Scope of intervention Our achievements Hydro Biomass Solar Informations Home / Wind Turbine / Introduction Presentation The force of the wind is used since the antiquity. Wind turbines destined to grind cereales or pump water contributed to the economic progress throughout the centuries. The advances in technology at the end of the 20th century permitted the development of powerful electrical wind generators who's yield regularly progressed. Functioning : The production of electricity from a wind turbine is done by the transformation of the wind's kinetic energy (movement of air mass) in mecanic energy, then in electric energy via a generator. The recuperable power by a wind turbine is a function of the diameter squared and the speed of the wind cubed, like shown in this formula: P = 1/2 ?AV3 Cp With : ? : volumic density of the air (1,225 kg/m3 à 15°C et 1013 mbar) A : surface swept by the rotor (m2) V : speed of the wind (m/s) Cp : coefficient of performance (without units) Assets : Wind energy is a renewable and clean energy: it doesn't generate any green house gases, nor wastes, nor air pollution. Its cost of production depends on the average wind level. In the most windy areas (North-East of Brazil and the most windy sites of Europe, for example), the cost of production of a new wind farm is inferior to the cost of a new gas or nuclear power plant. It does not necessitate the import of fuel, favorising energetic independence in the territory. Voltalia develops terrestrial farms (in opposition to windfarms located at sea) of small and medium sizes: between 10 et 30 MW. > In Brésil Voltalia signe son premier contrat de vente d’électricité dans le marché libre au Brésil > First revenues SMG A first 27 MW wind park (among the 4 parks in the São Miguel do Gostoso project) > News from Brazil As of October 1st, 2014, 2 wind turbines are generating electricity on the network in Brazilian site of Areia Branca. Sitemap Contact Legal notice