PREPARED BY-

JASHOBANTI BISWAL

REGDN. NO-0901106119

ELECTRICAL ENGINEEERING DEPARTMENT

Introduction

Different mechanisms

Spring coil mechanism

Rack pinion mechanism

MERITS and demerit

scope and uses

CONCLUSION

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 (potential energy)

as input.

So, this is a small step to try to

improve this situation.

SPRING COIL MECHANISM

RACK- PINION MECHANISM

CRANK-SHAFT MECHANISM

ROLLER MECHANISM

OUT OF THE ABOVE METHODS

CRANK-SHAFT MECHANISM & ROLLER

MECHANISM ARE NOT USED BECAUSE OF

THE DEMERITS RELATED TO THESE METHODS.

SO ONLY SPRING COIL MECHANISM &

RACK- PINION MECHANISM ARE

DISCUSSED.

Working principle

Conversion of mechanical

energy to pneumatic energy

which is converted to

electical energy

Here we are making the speed breaker of

vibrating type, when a vehicle crosses the

speed breaker, it gets pressed and then it

gets back to its original position.

Dimensions of speed breaker:-

Height : 0.2m

Width : 0.4m

Length : 4m

•The material

used in construction

of speed breakers is

steel.

•The shape of speed

breaker is

trapezoidal .

• 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.

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 /(Gd^4)

where

δ-deflection (in our case maximum δ =0.1m)

w=designed load

R= mean diameter of coil

d =diameter of wire

n=no of spring turns

G= Modulus of rigidity = 8*10^4 N/mm2

N= No. of springs

The no of turns in the spring to get the deflection of 0.1m is given by

n= δGd^4/(64 w*N*R^3)

Vehicle approaching the speed breaker

Maximum load on the speed breaker is when the vehicle is on the middle of the speed breaker.

When the load is on the speed breaker, the volume of air compressed by it is found by,

Volume of compressed air = Volume of air in base –Volume of spring

= (x m^3)/s

When the pressure

in the FRL unit

exceeds the

defined level the

valve opens and

the pressurized air

is given to the

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→highvelocity.

This high velocity compressd air when hits the impeller ,makes it to rotate.

CONSISTS -

Casing

Runner and buckets

CASING-

This is provided to safeguard device against

accidents.

It consists of a circular disc on the periphery of which have number of buckets evenly spaced are fixed. Each bucket is divided in to 2 symmetrical parts by a dividing wall is know as splitter.

When the air strikes the runner ,it rotates & continues rotation due to inertia.

An electrical generator is a machine which

converts mechanical energy in to electrical

energy.

The output of the alternator is used to light

the street lights & is rectified & stored in

batteries.

PRINCIPLE

MECHANICAL ENERGY IS

CONVERTED TO ELECTRICAL

ENERGY

The various machine elements used in the construction of power hump are

RACK-PINION

SPROCKETS

GEARS

FLY WHEEL

SHAFT

ELECTRIC GENERATOR

Transfers rotary

motion between

two shafts

The input gear

transfers power

to the output

gear.

This is used to regulate the energy and

maintain the energy at an uniform

level so that the shaft rotate at an

uniform r.p.m

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

Speed of vehicle

(km\hr)

Voltage generated

(volts)

10

20

30

40

50

7.93

6.28

5.03

4.66

3.03

Load(kgs) Voltage generated(V)

60(man load)

130

170

200

270

8.33

9.45

10.22

11.23

11.81

merits demerits

Low Budget electricity

production

Less floor area

No obstruction to traffic

Suitable at parking of

multiplexes, malls, toll

booths, signals, etc.

We have to check

mechanism from time to

time

It can get rusted in rainy

season

May not work with light

weight vehicles

Less quantity

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 Jersy,China

and Indonesia.

Lots of researches and investgations are

going on to practically utilise this technique

.

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 project is a one step to path

of exploring the possibilities of energy from

several non-conventional energy sources.

THANK YOU