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1. DESIGN AND FABRICATION:
ABRAR BASHA S
DILLS JOSEPH
FRANCIS JOSE
GIGEESH P S
PROJECT GUIDE:
MR.R.KRISHNAKUMAR
M.E.,(Ass. Professor )

2. CONTENTS
• INTRODUCTION
• WORKING PRINCIPLE
• METHODOLOGY
• OPERATION
• POWER AND ROTATIONAL SPEED
• MATERIALS REQUIRED
• DESIGN
• BUDGET
• USES
• ADVANTAGES AND DISADVANTAGES
• FUTURE APPLICATIONS
• CONCLUSION
• REFERENCE
• QUERY

3. INTRODUCTION
 The objective of this project is to generate electric
power through the fabrication of Savonius wind mill.
 A wind turbine is a machine that converts the kinetic
energy in wind into mechanical energy.
 If the mechanical energy is used directly by
machinery, such as a pump or grinding stones, the
machine is usually called a windmill.

4.  The Savonius rotor is S-shaped .
 All of these designs turn relatively slowly, but yield a
high torque.
 They can be useful for grinding grain, pumping water,
and many other tasks; but are not good for generating
large amounts of electricity.
 One might use a gearbox, but then efficiency suffers
and the machine may not start at all easily.
 This project is designed with Wind mill arrangement,
Dynamo, and Battery.

5. WORKING PRINCIPLE

6. Wind mill arrangement is the mechanical arrangements
which are easily rotated.
 The rotating speed is depends upon the wind strength.
 The wind mill arrangement is coupled with the
dynamo. So whenever the wind mill is rotated due to
wind, the dynamo also rotated.
 The electric power is generated in the dynamo.
 The generated electric power is given to battery
through the charging circuit.

7. METHODOLOGY

8. DESIGNING OF VAWT
ASSEMBLY
MACHINING
INSPECTION
PURCHASE OF
COMPONENTS
ANALYSIS
FINAL PRODUCT

9. OPERATION

10.  The Savonius turbine is one of the simplest turbines.
 Aerodynamically, it is a drag-type device, consisting of two
or three scoops.
 Looking down on the rotor from above, a two-scoop
machine would look like an "S" shape in cross section.
 Because of the curvature, the scoops experience less drag
when moving against the wind than when moving with the
wind.
 The differential drag causes the Savonius turbine to spin.

11.  Because they are drag-type devices, Savonius turbines
extract much less of the wind's power than other
similarly-sized lift-type turbines.
 Much of the swept area of a Savonius rotor may be near
the ground, if it has a small mount without an
extended post, making the overall energy extraction
less effective due to the lower wind speeds found at
lower heights.

12. POWER AND ROTATIONAL SPEED
 The maximum power of a Savonius rotor is given by ,
where and are the height and radius of the rotor
and is the wind speed.
 The angular frequency of a rotor is given by ,
where is a dimensionless factor called the tip-speed
ratio. λ is characteristic of a specific windmill, and its
value is typically between 0.5 and 14. In a Savonius
rotor, λ≈1.

13.  The maximum power of a Savonius rotor is given by , the
height and radius of the rotor and the wind speed.
 The angular frequency of a rotor is given by , where is a
dimensionless factor called the tip-speed ratio.
 λ is characteristic of a specific windmill, and its value is
typically between 0.5 and 14.
 In a Savonius rotor, λ≈1.
 For example, an oil-barrel sized Savonius rotor
with h=1 m and r=0.5 m under a wind of v=10 m/s, will
generate a maximum power of160 W and an angular speed
of 20 rad/s (190 revolutions per minute).

14. MATERIALS REQUIRED

15. S NO: NAME OF
COMPONENT
SPECIFICATION
IN MM
MATERIAL
USED
QTY
1 HALF CYLINDER
WANES
250×200 AL SHEET 4
3 BEARING - FE CASTING 4
4 ROTATING SHAFT 140×20 IRON ROD 1
6 DYNAMO - - 4
8 VOLTMETER - - 1
9 SCREWS
NUT & BOLT
- - 15-20
10 GEAR 96”
24”
- 2
11 BASE FRAME 180×150×300 WOOD 1

16. DESIGN AND FABRICATION

17. BUDGET

18. S NO: NAME OF
COMPONENT
QTY UNIT PRICE
IN RS
TOTAL PRICE
IN RS
1 HALF CYLINDER
WANES
2 210 420
3 BEARING 4 162.5 650
4 ROTATING SHAFT 1 100 100
5 MAIN SUPPORT
ROD
1 60 60
6 DYNAMO 4 300 1200
8 VOLTMETER 1 300 300
9 SCREWS
NUT & BOLT
15-20 - 65
10 GEAR 2 425 850
11 BASE FRAME 1 600 600
TOTAL 5870

19. USES
 Savonius turbines are used whenever cost or reliability is much
more important than efficiency.
 Most anemometers are Savonius turbines for this reason, as
efficiency is irrelevant to the application of measuring wind
speed.
 Much larger Savonius turbines have been used to
generate electric power on deep-water buoys , which need small
amounts of power and get very little maintenance.
 Design is simplified because, unlike with horizontal axis wind
turbines (HAWTs), no pointing mechanism is required to allow
for shifting wind direction and the turbine is self-starting.

20.  . Savonius and other vertical-axis machines are good at
pumping water and other high torque, low rpm
applications and are not usually connected to electric
power grids.
 Small Savonius wind turbines are sometimes seen used
as advertising signs where the rotation helps to draw
attention to the item advertised.
 They sometimes feature a simple two-frame animation
.

21.  Easy to implement and low maintenance.
 Power generate by the wind force .
 Power generated depend upon the wind force.

22. APPLICATIONS

23. FUTURE APPLICATIONS
 Everyday domestic purposes.
 In future VAWTs can be designed such that we can
increase its efficiency.
 Powering streetlamps and highways.
 Coupling VAWTs with the main electrical GRID , that
is ON GRID.
 VAWT powered motor vehicles and ships.

24. CONCLUSION
 The field of wind power utilization is not fully tapped
at the present time. As we are degrading our fossil fuels
at a high rate .It is important for us to look for
alternatives and certainly the VERTICAL AXIS WIND
MILL (VAWT) is a key process for harnessing this
renewable energy .

25. REFERENCE
 Design data book -P.S.G.Tech.
 Machine tool design handbook –Central machine tool
Institute, Bangalore.
 Strength of Materials -R.S.Kurmi
 Manufacturing Technology -M.Haslehurst.
 Design of machine elements - R.s.Kurumi

26. QUERY