Wind Generator Turbine is the device which converts kinetic energy of the wind into electrical energy. Turbines have two or three blades like a propeller which turn on a rotor. These blades get turned because of wind velocity and in turn rotate the rotor connected to main shaft. The shaft spins an electric generator, thus electricity is produced.
TYPES OF GENERATOR TURBINES:
Turbines are basically divided into horizontal and vertical axis types with wide varieties. Horizontal axis turbines are with two or three blades which face the wind and get operated upwind in most of the cases. Such turbines are usually used in wind farms and move with tip speed of more than 320Km/hr for commercial generation of electricity. Horizontal turbines are common in use.
The horizontal turbine consists of blades or rotors, drive train including gearbox and generator and a tower to support all equipments including controls, interconnection equipments, electrical cables, and ground support equipments.
As name suggests, main rotor shaft in vertical axis turbines is vertical and it does not need to be pointed towards wind to be more effective. This is why it is used where wind direction is variable or integrated in a building. It has low rotational speed with more torque requirements.
CLASSIFICATION OF TURBINES AND THEIR EFFICIENCIES:
Generator turbines are classified as IA, IB, IIA, IIB, IIIA, IIIB, IVA and IVB for wind speeds 10, 10, 8.5, 8.5, 7.5, 7.5, 6 and 6 meter per second respectively. A denotes turbulence 18% and B denotes turbulence 16%. According to Betz’s law maximum wind power extraction from the turbine is 59% of the total kinetic energy. Power delivered by the turbine reduces with time due to wear. Blade friction, drag, gear friction losses, converter and generator losses also reduce its efficiency. In general, 75 to 80% of Betz’s limit is achieved in practice at rated operating speed.
WHERE USED ACCORDING TO SIZE:
Electricity generation from small turbines is used for charging batteries of boats, caravans or traffic warning systems. Medium sized turbines of less than 50 Kilo watts are in use for supplying power to homes and with provision for transfer of unused power to power grid of the place. Telecommunication towers also use such turbines for power.
Turbines from 50 Kilowatts to several megawatts arranged in Wind farms are widely in use as important source of renewable energy to reduce dependency upon conventional power and for making environment clean. These are highly cost effective and supply bulk power to grid system. Offshore wind installations utilize huge wind energy potential as renewable energy source. Size in dimensions is quite large for higher megawatt turbines.
Wind Generator Turbine can be purchased from online shops or through distributors of firms. Pacific Sky Power, GudCraft, Missouri Wind and Solar, XA, Sun Force, ALEKO, Wind Max, Pacific Sky Power, DuroMax, Thames and Kosmas are some reliable manufacturers of turbine generators who manufacture quality products for various power ranges in competitive costs. Get competitive price by floating quotations.