03-05-2012, 03:52 PM
PRODUCE ELECTRICITY BY THE USE OF SPEED BREAKERS
PRODUCE ELECTRICITY BY THE USE OF SPEED BREAKERS.pdf (Size: 126.91 KB / Downloads: 433)
INTRODUCTION
Next time on the roads, don’t scoff at the speedbreakers.
They could actually light up small
villages off the highway. The rotor (rotating shaft)
is directly connected to the prime mover and
rotates as the prime mover turns. The rotor contains
a magnet that, when turned, produces a moving or
rotating magnetic field. The rotor is surrounded by
a stationary casing called the stator, which contains
the wound copper coils or windings. When the
moving magnetic field passes by these windings,
electricity is produced in them. By controlling the
speed at which the rotor is turned, a steady flow of
electricity is produced in the windings. These
windings are connected to the electricity network
via transmission lines. IIT Guwahati has evaluated
the machine and recommended it to the Assam
ministry of power for large scale funding. IIT
design department says it is a ‘very viable
proposition’ to harness thousands of mega watts of
electricity untapped across the country every day.
[7] A vehicle weighing 1,000 kg going up a height
of 10 cm on such a rumble strip produces
approximately 0.98 kilowatt power. So one such
speed-breaker on a busy highway, where about 100
vehicles pass every minute, about one kilo watt of
electricity can be produced every single minute.
The figure will be huge at the end of the day.
A storage module like an inverter will have to be
fitted to each such rumble strip to store this
electricity. The cost of electricity generation and
storage per mega watt from speed-breakers will be
nearly Rs 1 crore as opposed to about Rs 8 crore in
thermal or hydro power stations.
The functioning will be as follows:
1. The speed breaker on a busy road will be
lifted to some height from one side and
fixed to the road from other side.
2. Then there will be a shock absorber kind of
mechanism beneath the speedbreaker. The
arrangement will be as in a cam and shaft
arrangement.
3. The shaft of the generator placed below will
be attached to the cam and the rod
connected to the speed breaker vertically
will be on cam. This arrangement will make
one rotation of generator shaft as soon as a
vehicle moves over speed breaker.
4. The rotations can also be increased using
certain mechanism, like gears and all.
5. Then there will be a circuit storing the
electricity generated during day time and
the power generated will be used during
night.
According to concept it is known as "reciprocating
bump". The speed breaker designed is supported on
springs. When a vehicle mounts the speed breaker,
the load on the springs causes movement which is
converted to a rotary motion by using a rack and
pinion mechanism. The energy is generated and
can be stored in batteries. The input for producing
energy is the weight of the vehicle.[2]
Journal of Engineering Research and Studies E-ISSN 0976-7916
JERS/Vol.II/ Issue I/April-June, 2011/163-165
Working diagram
Fig-I Top view
Fig-II Side view
Fig-III
Now the question arises why only the speed
breaker is used and not the rough road or plane
road where the kinetic energy of the vehicle is
more then what is getting on the speed breaker for
answer to this question let look on one example:A
car or any heavy vehicle is coming with a speed of
100 mph on the road and passing over this roller
which is fitted at the level of the road then this
roller is gaining the speed nearly somewhere 90
mph (due to losses). So now suppose a cycle is
coming with a speed of 20 mph and is going to pass
this roller (which is moving at a speed of 90 mph)
due to this difference in the speed there will be a
collision that is the main reason for using this
concept on the speed breaker.[1]
Producing electricity from a speed breaker is a new
concept that is under going research. The number
of vehicles on road is increasing rapidly and if we
convert some of the kinetic energy of these vehicle
into the rotational motion of roller then we can
produce considerable amount of electricity, this is
the main concept. In this project, a roller is fitted in
between a speed breaker and some kind of a grip is
provided on the speed breaker so that when a
vehicle passes over speed breaker it rotates the
roller. This movement of roller is used to rotate the
shaft of D.C. generator by the help of chain drive
which is there to provide 1:5 speed ratio. As the
shaft of D.C. generator rotates, it produces
electricity. This electricity is stored in a battery.
Then the output of the battery is used to lighten the
street lamps on the road. Now during daytime we
don’t need electricity for lightening the street lamps
so we are using a control switch which is manually
operated .The control switch is connected by wire
to the output of the battery. The control switch has
ON/OFF mechanism which allows the current to
flow when needed.
EQUIPMENT USED:
1. Rack And Pinion Gears
The rack and pinion is used to convert between
rotary and linear motion. The rack is the flat,
toothed part, the pinion is the gear. Rack and pinion
can convert from rotary to linear of from linear to
rotary.[3][4]
2. Ball bearings
A roller-element bearing is a bearing which
carries a load by placing round elements between
the two pieces. The relative motion of the pieces
causes the round elements to roll (tumble) with
littlesliding.[3]Fig-III
3. Springs
A spring is a flexible elastic object used to store
mechanical energy. Springs are usually made out of
hardened steel. Small springs can be wound from
pre-hardened stock, while larger ones are made
from annealed steel and hardened after fabrication.
Some non-ferrous metals are also used including
phosphor bronze and titanium for parts requiring
corrosion resistance and beryllium copper for
springs carrying electrical current (because of its
low electrical resistance).[3][4]
4. Dynamo
The dynamo uses rotating coils of wire and
magnetic fields to convert mechanical rotation into
Journal of Engineering Research and Studies E-ISSN 0976-7916
JERS/Vol.II/ Issue I/April-June, 2011/163-165
a pulsing direct electric current through Faraday's
law. A dynamo machine consists of a stationary
structure, called the stator, which provides a
constant magnetic field, and a set of rotating
winding called the armature which turn within that
field. On small machines the constant magnetic
field may be provided by one or more permanent
magnets; larger machines have the constant
magnetic field provided by one or more
electromagnets, which are usually called field coils.
5. Speed Breakers
Speed breakers are used to slow down the speed of
vehicle by offering a resistance on wheels. It is in
strips in two to five number lying parallel to each
other on the road. It can be easily seen on railway
crossings.[5]
CONCLUSION AND FUTURE ASPECTS
In the coming days, as demand of electricity is
increasing every moment, it will prove a great boon
to the world, since it will save a lot of electricity of
power plants which are wasted in illuminating the
street light. Future aim of this research is to
develop our country by enriching it in utilizing its
sources in more useful manner. Any country can
only develop when it uses power supply frequently
and not by getting breakdown in middle course of
time. Now times comes when these types of
innovative ideas should be brought into practice.
Atleast, by this idea we should start to think
something about to save electricity.
This project can also be modified by using
camshaft and pulley system instead of gears which
we have used in our project which will reduce the
complexities and difficulties faced during the
project.