Friday, 28 June 2013

Power generation from speed breakers

So there is a need to generate power from every possible means rather than solely depending on power generaton from power plants..
Hence i would like to present an idea of generatng electric power at low cost using simple mechanism of converting mechanical energy to electrical energy..
Power generation from speed breakers

Power generation from speed breakers
next time on the roads, don't scoff at the speed-breakers. They could actually light up small villages off the
An amateur innovator in Guwahati has developed a simple contraption that can generate power when a vehicle passes over a speed breaker. Kanak
Gogoi, a small time businessman, has developed a mechanism to generate power by converting the potential energy generated by a vehicle going up
on a speed breaker into kinetic energy. The innovation has caught the eye of the Indian Institute of Technology (iit),
Guwahati, which will fund a pilot project to generate electricity from speed-breakers.
The idea is basic physics. Gogoi has welded five-metre-long metal plates into the speed-breaker instead of the conventional
bitumen-and-stone-chip rumble strip. The plates are movable and inclined with the help of a spring-loaded hydraulic system.The fulcrum-attached
plates are pushed down when a vehicle moves over them and bounce back to original position as it passes.
"When the vehicle
moves over the inclined plates, it gains height resulting in increase in potential energy, which is wasted in a conventional rumble strip," Gogoi says.
"When the plates come down, they crank a lever fitted to a ratchet-wheel type mechanism. This in turn rotates a geared shaft loaded with recoil
springs. The output of this shaft is coupled to a dynamo to convert kinetic energy into electricity," he explains.
iit Guwahati has evaluated the machine and recommended it to the Assam ministry of power for large scale funding. A K
Das, a professor at iit's design department says it is a 'very viable proposition' to harness thousands of mega watts of
electricity untapped across the country every day.
"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," he said.
The Assam power ministry is expected to back the iit pilot project.
Das says 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
The idea is '"Generating electric power from speed breakers"
>i.e, To generate electricity using the vehicle weight (potential energy) as input...As already known we need a generator to generate electricty and obviously the prime mover to it will be the vehicle weight.

then the generated elecctricity is stored in batteries and will be further used for various purposes like lighting up the street lamps, providing power to the nearby slums at low cost etc...

>Thus this project accomplishes
Low Budget electricity production
Less floor area
No obstruction to traffic
Easy maintenance
Suitable at parking of multiplexes, malls, toll booths, signals, etc.
Uses: Charging batteries and using them to light up the streets, etc.
Possible using 3 different mechanisms:
I.Crank-shaft mechanism
II.Roller mechanism
III.Rack- Pinion mechanism
Rack-pinion mechanism is better to prefer because of the following reasons::
>>Crank-shafts are required to be mounted on bearings which creates balancing problem leading to mechanical vibrations which in turn damage the bearings.
  —Secondly as bearings are of sliding type, any occurrence of variable load( which is bit obvious in caseof    vehicles!!) leads to balancing problem
>>Roller mechanism has some different disadvantages.
  —Maintenance will be very difficult
  —Might cause collision.
>>Rack-Pinion assembly gives good mounting convenience
  — Maximum gear losses– 3 to 5%
  —Efficiency– 95%
 >>A dc generator whose shaft is coupled to the roller mechanism is used for
                                                                           generating electrical output.
                        Selection of springs.
   —Achieving proper balance of speed and torque....should be taken care to yield better efficiency..
 Future Scope::
Such speed breakers can be designed for heavy vehicles, thus increasing input torque and ultimately output of generator.
   More suitable and compact mechanisms to enhance efficiency.

1 comment:

  1. Congratulations guys, quality information you have given!!!Your blog is really helpful for final year students...

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