19-04-2011, 03:18 PM
SUBMITTED BY:
BIRAJ MOHAPATRA
NIRMAL CHAND
SAIKAT GANGULY
SUKANYA BEHERA
SUMANTA KUMAR DASH
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Generating Electricity using Power Humps
Introduction
Due to day-to-day increase in population and lessen of the conventional sources, it becomes necessary that we must depend on non-conventional sources for power generation.
Energy crisis is a significant bottleneck (or price rise) in the supply of energy resources in an economy. It usually refers to the shortage of oil and additionally to electricity or other natural resources. An energy crisis may be referred to as an oil crisis, petroleum crisis, energy shortage, electricity shortage electricity crisis.
We get electricity, which is a secondary energy source, from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources.
Due to the shortage of conventional sources we have to depend upon non conventional sources of energy.
So we can use power humps as an alternate source of energy.
While moving, the vehicles posses some kinetic energy and it is being wasted. This kinetic energy can be utilized to produce power by using a special arrangement called “Power Hump”.
About Power Hump
Power Hump is a dome shaped speed breaker having some special arrangement which helps in generating electricity from high speed moving vehicles.
The main concept of the project is that if we convert some of the kinetic energy of the vehicles into rotational motion, then we can generate a substantial amount of electricity.
Review of Literature
According to Rhodri Phillips (2009) of the Automobile Environment Network Green “speed bumps that will generate electricity as cars drive over them are to be introduced on Britain’s roads.”
Peter Hughes, the designer behind the idea said “They are speed bumps, but they are not like conventional speed bumps. They don’t damage your car or waste petrol when you drive over them – and they have the added advantage that they produce energy free of charge.”
A spokesman for Ealing council in west London confirmed that £150,000 of funding had been secured for the scheme of power humps.
A K Das, a professor at IIT's design department says "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.
An amateur innovator in Guwahati Kanak Gogoi (2007),has come up with his latest invention, which promises to convert the kinetic energy generated by speeding vehicles into electrical energy, a ''mechanical ramble stripe'' or ''mechanical speed breaker
In the above connection, another youngstre R.C.Prince Leo (2010) has concentrated the focus on the very new and innovative concept i.e. generating electricity from speed breaker.
Critical appraisal of literature
Till date no reviewed and published documents are available in the literature. However, some conceptual ideas regarding this technology are collected from various sources, such as, internet and editions of news papers.
This being a novel as well as upcoming research area, the design, development and performance evaluation of the said technology motivated us for this project work.
Objective
The above challenges inspired us a lot and made us to think about for generating mechanism to save the wasted power from automobiles to generate electricity
In specific terms, the objectives of the project work are as follows:
1. To select an alternate source for generation of electricity for lightening the streets
2. To design, develop and performance evaluation of the mechanical setup of the project work.
Theory
Power hump is a dome like device likely to be speed breaker.
Whenever the vehicle is allowed to pass over the dome it gets pressed downwards then the springs are attached to the dome are compressed and the rack which is attached to the bottom of the dome moves downward in reciprocating motion.
Since the rack has teeth connected to gears, there exists conversion of reciprocating motion of rack into rotary motion of gears but the two gears rotate in opposite direction.
A flywheel is mounted on the shaft whose function is to regulate the fluctuation in the energy and to make the energy uniform. So that the shafts will rotate with certain rpm these shafts are connected through a belt drive to the dynamos, which converts the mechanical energy into electrical energy.
Detail design of equipments
Design of spring
chromium vanadium alloy steel is used as spring material
Maximum shear stress induced:
Deflection of spring:
Free length of spring:
d = 7.67mm
n = 25
Pitch of the coil=14.97mm
L = 389.32mm
