The document discusses wind power and wind turbines. It explains that wind is created by uneven heating of the earth's surface, and the power of wind is determined by air density, rotor area, and wind speed. There are two main types of wind turbines: horizontal axis wind turbines (HAWT) and vertical axis wind turbines (VAWT). HAWTs are the most common and can have one, two, or three blades mounted on an axis parallel to the ground and to the wind flow. VAWTs have vertical axes and either a Savonius S-shaped design or a Darrieus eggbeater shape. Both turbine types use rotating blades connected to a generator to convert kinetic wind energy into electrical energy.

1. WIND POWER
• BHATT PARVAM
• GOHIL MEHUL
• BHARVAD RAVI
• DESHANI
KIRTAN

2. WIND POWER
Q. Where Does The Wind Come From?
 The wind Is a by-product of solar energy.
 Approximately 2% of the sun’s energy
reaching the earth is converted into wind
energy.
 The surface of the earth heats and cools
unevenly, creating atmospheric pressure
zones that make air flow from high-to low-pressure
areas.

3. WIND POWER
 Equation Of Wind Power
 The amount of power available in the wind is
determined by the equation:
w=1/2 r A v3
 W is power, r is air density, A is the rotor area,
and v is the wind speed.
 This equation states that the power is equal to
one-half ,times the air density, times the cube of
the wind speed. Air density varies according to
elevation, temperature and weather fronts

4. WIND MILL :-

5. WIND TURBINES
 Defination
 Rotary engine in which the kinetic energy of a
moving fluid converted into mechanical energy
by causing a bladed rotor to rotate.
 Wind rotates the turbine blades:-
1. Spins a shaft connected to a generator
2. The spinning of the shaft in the generator
makes electricity.

6. WIND TURBINES
 Classification
 There are two types of wind turbines
1. Horizontal axis wind turbine (HAWT)
2. Vertical axis wind turbine (VAWT)

7. HORIZONTAL AXIS WIND TURBINE (HAWT)
 INTRODUCTION
 This is the most common wind turbine design.
 In addition to being parallel to the ground, the axis of blade
rotation is parellel to the wind flow.
 Some machines are
designed to operate in
an upwind mode, with
the blades upwind of the
tower. In this case, a tail vane
is usually used to keep the
blade facing into the wind.
 Other designs in a downwind
so that the wind passes the tower
before striking the blades.

8. HORIZONTAL AXIS WIND TURBINE (HAWT)
 TYPES
1. ACCORDING TO NUMBER OF BLADES
a) MONO BLADES
b) TWIN BLADES
c) TRIPLE BLADES
2. ACCORDING TO POWER OUTPUT
a) SMALL CAPACITY= 10-50KW; ROTOR DIA. 1-16
METERS.
b) MEDIUM CAPACITY= 50-500KW; ROTOR DIA. 16-50
METERS.
c) LARGE CAPACITY= 500-1000KW; ROTOR DIA. 50-130
METERS.

9. HORIZONTAL AXIS WIND TURBINES (HAWT)
 THREE TYPES OF BLADES :-
1. MONO BLADE
2. TWINE BLADE
3. TRIPLE BLADE

10. HORIZONTAL AXIS WIND TURBINE (HAWT)
 TYPES :-

11. HORIZONTAL AXIS WIND TURBINE (HAWT)
 TYPES
4. ACCORDING TO UPWIND AND DOWN
WIND TURNINES.
A. TURBINES WHICH FACE WIND STREAM ARE
CALLED UP WIND TURBINE.
B. TURBINE WHICH RECIVES WIND FROM REAR
SIDE ARE DOWN WIND TURBINE.

12. VERTICAL AXIS WIND TURNINES (VAWT)
 There are two types of VAWT :-
1. Savonius wind turbines
2. Darrieus wind turbines

13. VERTICAL AXIS WIND TURBINE (VAWT)
1. Savonius wind turbines
 The savonius turbine is S- shaped
if viewed from above.
 This drag-type VAWT turns
relatively slowly, but yields a
high torque.
 It is useful for grinding grain,
pumping water, and many other
tasks, but its slow rotational speeds
make it unsuitable for generating electricity on a large-scale.

14. VERTICAL AXIS WIND TURBINS (VAWT)
1. Savonius Wind Turbines
SAVONIUS WIND MILL

15. VERTICAL AXIS WIND TURBINE (VAWT)
2. Darrieus Wind Turbines
 The Darrieus turbine is the most famous VAWT.
 It is characterized by its C-shaped rotor blades which
give it its
eggbeater appearance.
 It is normally built with two or three blades.

16. HORIZONTAL AXIS WIND TURBINE (VAWT)

17. VERTICAL AXIS WIND TURBINE (VAWT)
 CONSTRUCTION

18. VERTICAL AXIS WIND TURBINE (VAWT)
 CONSTRUCTION (PARTS)

19. VERTICAL AXIS WIND TURBINE (VAWT)
 Working of different Parts
 ROTOR – The hub and the blades together are referred
to as
the rotor. Wind turns the blades which turn the
drive shaft.
 SHAFT - Two different shaft turn the generator. one is
used
for low speed while another is used in high
speeds.
 GEAR BOX – Gear connect the high and low speed
shaft and increase the rotational
from about 10-60 rotational per minute to
about 1200-1800 rpm, the rotational speed
required by most generators to product
power

20. HORIZONTAL AXIS WIND TURBINE (VAWT)
 Working of different Parts
 GENERATOR - The generator is what converts the turbine’s
Blades into electricity. Inside this component, Coils of wire rotated in
A magnetic filed to produce Electricity. Different generator designs
produce either Alternating current (AC) or direct current (DC), and they
Are available in a large range of output power ratings.
 Controller – Turns the blades on at 8-16 mph and Shuts them down
around 65 to prevent any high wind Damage.
 Tower - Tall tubular metal shaft. The taller tower, the more power
produce.