3. Definition
§ A wind-driven electric generator
designed for utilization of wind
power on a commercial scale.
§ Also called wind turbine.
4. ØPrinciple:
§ The kinetic energy of a moving fluid is
converted into mechanical energy by
causing a bladed rotor to rotate.
ØTurbine blades spin from the wind.
ØThis spins a shaft connected to a
generator.
ØThe spinning of the shaft in the
generator makes electricity.
Working
5. Ø Wind turbines are mounted on a tower to capture the
most wind energy.
Ø Wind speed varies by height.
Ø Wind current 100m above the ground dropped in
speed by 10% when its height declined to 50m.
Ø Property is known as wind sheer
§ Wind speed increases with height.
§ Due to friction at the Earth’s surface.
Ø The Hub heights of modern wind turbines, which
produce 600 to 1,500 kW of electricity, are usually 40
to 80 meters above ground.
Wind Sheer
11. Gear box: Wind turbines rotate typically between 40 rpm and 400 rpm.
Generators typically rotates at 1,200 to 1,800 rpm. Most wind
turbines require a step-up gear-box for efficient generator
operation (electricity production).
Blades and rotor: Converts the wind power to a rotational mech. power.
Generator: Converts the rotational mechanical power to electrical power.
Main components of Wind Turbine
12. The portion of the wind turbine that collects energy from the
wind is called the rotor. The rotor usually consists blades.
The blades are attached to the hub, which in turn is
attached to the main shaft.
Rotor
16. Definition
Ø Horizontal axis wind turbine
have axis of rotation parallel to
the ground and vertical axis
wind turbine have axis of
rotation perpendicular to
ground.
17. Ø Higher wind speeds
Ø Great efficiency
Ø Angle of turbine is relevant
Ø Difficult access to generator for repairs
Advantages
Disadvantages
18.
19. Definition
Ø A vertical axis wind turbine has its axis
perpendicular to the wind streamlines and
vertical to the ground. Also called as
"transverse axis wind turbine" or "cross-flow
wind turbine.“
Ø This arrangement allows the generator and
gearbox to be located close to the ground,
facilitating service and repair.
21. Ø Can place generator on ground
Ø You don’t need a yaw mechanism for wind
angle
Ø Lower wind speeds at ground level
Ø Less efficiency
Ø Requires a “push”
Advantages
Disadvantages
22. Site Selection
ØBase on Wind velocity in prevailing area
by considering data of last 5 year of wind
velocity
ØBase on latitude of place.
ØCost of land
ØLocal condition
ØNear to electricity grid
ØTerrain of rain
23. India : Scenario
Ø As of 28 February 2018 the total
installed wind power capacity was
32.96 GW.
ØIndia is the fourth largest installed wind
power capacity in the world.
Ø52.67 TWh generated in the year
2017-18, which is nearly 3% of total
electricity generation.
26. Windmills on the Tirumala
hills in Andhra Pradesh
Wind turbines midst of
India's agricultural farms
A wind farm in RajasthanHybrid in Leh, J&K state
