This document proposes generating electricity from speed breakers using a rack and pinion mechanism. Vehicles passing over speed breakers produce kinetic energy that can be converted to mechanical energy using a rack and pinion system connected to a generator. The rack and pinion arrangement moves more efficiently than roller or air piston mechanisms. Calculations show a typical vehicle passing over a 15cm speed breaker could generate over 7 watts of power, enough to light street lamps. This presents a renewable energy solution that harnesses wasted kinetic energy from vehicles.

1. ELECTRICITY GENERATION FROM SPEED
BREAKER
Presenting by-
Saifuddin MirzaSaifuddin Mirza
AhmedAhmed(109)(109)
Rijuan HussainRijuan Hussain (134)(134)
Niraj KakatiNiraj Kakati (142)(142)
Keshav Kumar RoyKeshav Kumar Roy(130)(130)
Feroz Ahmed MazumderFeroz Ahmed Mazumder
for the minor project-
Don Bosco School of TechnologyDon Bosco School of Technology1.1.

2.  Introductions.Introductions.
 Different mechanisms.Different mechanisms.
 Rack & pinion mechanism.Rack & pinion mechanism.
 Power Calculations.Power Calculations.
 Importance of the project.Importance of the project.
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 Overview

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 IntroductionIntroduction
 India is a country, which suffers a lot due to the lack of sufficient power
generation.
 What electricity means to us ?
 We need electricity for every small things.
 Large amount of power is wasted at speed breakers.
 Use of fossil fuels for power generation is harmful, causes depletion of
resources.
 With increasing population we need a solution using renewable sources.

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 What is the solution ?What is the solution ?
 Solution is to use a power extracting mechanism in the speed breakers.
 Okay but How ?
 As we know that “Energy can be transformed into one another form”.
 By converting the kinetic energy of vehicle to a mechanical form and
then into a electrical energy form.
 Latest renewable source technology used is called “POWER
HUMP”.
 Use the vehicle weight as input to move the pinion which moves the
generator shaft and power can be produced.

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 Block diagramBlock diagram

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 Different mechanismsDifferent mechanisms
 The usage of vehicle weight for generator shaft rotation can be possible
through 3 mechanisms-
1) Roller mechanisms.
2) Air piston mechanisms.
3) Rack & pinion mechanism.

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 Roller mechanismRoller mechanism
 Roller is fixed in the middle of the speed
breaker.
 As the vehicle passes, the cylindrical portion
rotates in the direction of motion of vehicle.
 The roller is linked with a shaft of DC
generator through chain system.
 The roller rotates the generator shaft and the
electricity is produces, which can be stored in a
battery as for further use.

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 Roller mechanismRoller mechanism
 Slipping of the roller may
cause no power production.
 Simple in construction and
pollution free.
 Power produced is very low.
 Strength and losses are the
limitation for this method.

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 Air piston mechanismAir piston mechanism
 Due to weight of vehicle over
the curved sheet, the dome goes
inside.
 The assembly pushes down the
spring, which lowers the piston
connected with the dome.
 This quick action compresses
the air inside the
compressor, which escapes out
from the delivery pipe.

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 Air piston mechanismAir piston mechanism
 Again the piston moves back
with the dome as the load
removes, which sucks the air
again into the compressor.
 The exhausted air is stored in an
air cylinder.
 These repeated steps moves the
generator shaft through air
pressure.

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 Rack & pinion mechanismRack & pinion mechanism
 The curved speed breaker is
connected with a rack & pinion
arrangement.
 Pinion is linked with a chain
sprocket arrangement.
 The sprockets are connected with a
shaft, which joins the generator
shaft.
 Also a flywheel is fixed in the shaft.

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 Rack & pinion mechanismRack & pinion mechanism
 The reciprocating motion of rack is
converted into rotary motion by
pinion.
 This rotary motion is transferred to the
generator shaft through the chain and
sprocket arrangement.
 A small (generator shaft) and a big
(pinion shaft) sprockets are used, which
maintains the speed.
 A flywheel on shaft of smaller sprocket is

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 Why rack & pinionWhy rack & pinion
mechanism?mechanism?
 Rack - pinion arrangement gives good
mounting convenience.
 Simple in design, and more efficient than
the roller mechanism.
 Also linking with flywheel gives full rotation
of the shaft, after the removal of the load
from the breaker.
 Less costly than the air piston mechanism
and easy in maintenance.

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 Power calculationsPower calculations
 Suppose mass of vehicle is 300 kg so, its weight is
300 * 9.81= 2943 N
 If the height of the speed breaker is 15cm
suppose
 Workdone is 2943 * 0.15=441.45 J
 Power developed is 441.45/60 = 7.3575 W
 Power produced for 1 min = 7.3575W
 Power produced for 1 hour = 441.45W

This much power
is much more to
light the street
lamps for almost
full night.

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 Design calculationsDesign calculations
 Velocity ratio = ratio of ang. vel.’s of driving to driven
gears.
 No. of teeth of sprockets ratio of 360° by pitch angle.
 Length of chain is product of no. of links and pitch of
chain.
 No. of link is given as
 The sprocket should contain a odd no. of links.
 One smaller sprocket and a larger sprockets will be used.
 A 5V dynamo is used to generate electricity.

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 Advantages &Advantages &
DisadvantagesDisadvantages
 Power generation with low cost.
 Simple in constructions and eco friendly.
 No need for manpower to operate.
 Will work with light weight and also heavy weight vehicles.
 Have to check the mechanism time to time.
 Can get rusted in rainy days.
 Should be used in small speed breakers, larger breakers may break with
heavy loads.

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 ConclusionConclusion
 Electricity in India has a major problem, so this method
is much more efficient.
 We can use the power to light the road lamps, and the
present power used for this purpose can be utilized for
other purpose also.
 We can also use this technique in various stages.
 Using piezo electric sensors in the stairs we can also use
the human weight to produce power.
 This arrangement can be used in our university also, and
we can utilize the power to light the lamps during night.

18. T
H
A
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K
‘U’
Wednesday, May 11, 2016 EVERY ONE