hello, friends this is a process .By which we can generate electricity from speed breakers.I hope this will be very useful for you.

1. POWER GENERATION FROM SPEED
BREAKERS
PREPARED BY
PRADIP KUMAR
DEPARTMENT OF MECHANICAL ENGG.

2. Contents
 Introduction
 Different mechanisms
 Spring coil mechanism
 Roller mechanism
 Rack pinion mechanism
 Different Comparisons
 Merits and Demerit
 Scope and Uses
 Conclusion
 References

3. introduction
 A large amount of energy is wasted at the speed
breakers through friction , every time a vehicle passes
over it.
 So electricity can be generated using the vehicle weight
and speed (kinetic energy) as input.
 So, this is a small step to try to improve this situation.

4. Possible using different mechanisms
 SPRING COIL MECHANISM
 ROLLER MECHANISM
 CRANK-SHAFT MECHANISM
 RACK- PINION MECHANISM

5. Spring coil mechanism
• Height: 0.35m
• Length : 4m
• Width :0.45m
• The bottom layer of
the trench is filled with
concrete or with
wooden plates of 0.5m.
•This is for cushion
effect.

6. DESIGN OF THE SPRING
 The actual height of spring is 0.3m before loading.
 The deflection of the spring is given by
δ = 64 w *n*N*R^3 /(G^4)
where
δ-deflection (in our case maximum δ =0.1m)
w=designed load
R= mean diameter of coil
n=no of spring turns
G= Modulus of rigidity = 8*10^4 N/m^2
N= No. of springs
 The no of turns in the spring to get the deflection of 0.1m is
given by
n= (0.1)G^4/(64 w*N*R^3)

7. Roller mechanism
 Here roller, sprocket-chain
arrangement is used.
 Ratio of speed of roller to
Dynamo shaft is 1:4.

8. Rack-pinion mechanism
The various machine elements used in the construction of power
hump are
 RACK-PINION
 SPROCKETS
 GEARS
 FLY WHEEL
 DYNAMO

9.  Gear mechanism
The input gear transfers
rotational motion to the output
gear.
 Rack-Pinion
It coverts linear motion to
rotational and vice versa.

10.  Sprocket mechanism
Transfers rotary motion
between
two shafts
 Dynamo
It is the dc generator which
is used to generate current.
And current is generated as
per the
Faraday’s Law.

11. Continued…
Fly wheel
 This is used to regulate the energy and maintain the energy at an
uniform level so that the shaft rotate at an uniform rpm.
Constructional details

12. Working procedure
 Here the reciprocating motion of the speed-breaker is converted into rotary
motion using the rack and pinion arrangement.
 Rack and pinion gears normally change rotary motion into linear motion,
but sometimes we use them to change linear motion into rotary motion.
 The axis of the pinion is coupled with the sprocket arrangement.
 The axis of the smaller sprocket is coupled to a gear arrangement.
 Finally the gear arrangement is coupled with the generator

13. CALCULATIONS & RESULTS
 Average weight of a vehicle = 700kg
 Height of speed brake = 10cm
 Work done = Force × Displacement
 W = F.d cos(θ) But θ =0˚ , because force acted in the direction of displacement.
 Force = mass × gravitational accleration
 Force = 700kg× 9.81 = 6867N
 Displacement covered by the speed breaker = 10cm = 0.10m
 Output power = work done per sec
 Output power = (6867 × 0.10)/60
 Output power = 11.445 Watts
 Power developed for 1 vehicle passing over the speed breaker is 11.445 watts; due to
flywheel it delivers power for one minute continuously. So the power developed for:
 1 hr = 686.7
 24 hours = 16.480 KW

14. NOZZLE
 The diameter of the inlet
of nozzle must be greater
than outlet.
 Here the pressure energy
is converted to kinetic
energy i.e pressure high
velocity.
 This high velocity
compressed air when hits
the runner, makes it to
rotate.

15. Working process
 Maximum load on the speed
breaker is when the vehicle is
on the middle of the speed
breaker.
 When the pressure in the FRL
unit exceeds the defined level
the valve opens and the
pressurized air is given to the
nozzle.

16. RUNNER
 It consist of a circular
disc on the periphery
of which have number
of buckets evenly
spaced fixed. Each
bucket is divided into
two symmetrical parts
by a dividing wall is
known as splitter.
 When the air strikes
the runner. it rotates
and continues
rotations due to
inertia.

17. ADVANTAGES AND DISADVANTAGES
Advantages Disadvantages
Pollution free power generation. Selecting suitable generator.
No obstruction to traffic. Selection of springs.
Low Budget electricity production Achieving proper balance of speed and
torque.
Easy maintenance It gives low electric output

18. SCOPE AND USES
 This mechanism is very economical and easy to
install.
 Two protocols of this type of speed breakers are
developed in India .not practically implemented
till date.
 Practically implemented in New Jersey , China and
Indonesia.
 Lots of researches and investigations are going on
to practically utilize this technique
 By doing proper arrangements we may generate
high power electricity

19. Conclusion
 The existing source of energy such as coal, oil etc may not
be adequate to meet the ever increasing energy demands.
These conventional sources of energy are also depleting
and may be exhausted.
 These are some non-conventional methods of producing
energy. This is a one step to path of exploring the
possibilities of energy from several non-conventional
energy sources.

20. REFERENCES
www.wikipedia.com
www.seminarsonly.com
www.google.co.in
www.slideshare.com

21. THANK YOU