Footstep Electricity Ppt

Footstep Electricity

Generation

Presented by:- Sriparna Nandi. Branch:-

Electrical Roll no.:-803142

Introduction

Man has needed and used energy at an increasing rate for his sustenance and wellbeing ever since he came on the earth a few million years ago. Due to this a lot of energy sources have been exhausted and wasted. So, non-conventional energy is very essential at this time to our nation.

Walking is the most common activity in day to day life. When a person walks, he lose energy to the road surface in the form of impact, vibration, sound etc, due to the transfer of his weight to the road surface, through foot falls on the ground during every step. This energy can be tapped and converted in the usable form such as in electrical form.

Footstep electric converter device (FSEC) This device, if embedded in the footpath, can convert foot

impact energy into electrical form. The downward movement of the plate results in rotation of

the shaft of an electrical alternator, fitted in the device, to produce electrical energy.

The electricity generated from these devices can be used for street lights.

The device was tested and it was demonstrated that the energy generated by this device can be stored in a 12 V lead acid battery.

A 100 watt, 230 volt bulb was connected to the battery through an inverter. The device was operated by persons walking over to it. The bulb automatically lights up when the battery reaches its full voltage.

Fig. 1FSEC developed by

the reactor control division

Operation of FSEC The working of the Foot Step Electric

Converter (FSEC) is demonstrated in photographs in Fig. 2.

A 6 W, 12V bulb connected to the output of the alternator glows, to indicate the electric output when foot load is applied.

The unit is designed to generate full power pulse when actuated by a person weighing nearly 60 kg.

An experimental plot of voltage vs. time was

generated, by using an oscilloscope. Using voltage data and the load (a resistor), a typical plot of power vs. time was generated. The plot is shown in fig 3.

Fig. 3: Power vs. Time Plotfor Single Step

Fig. 2: Operation of Foot Step Electric Converter(a) After applying weight (Bulb lights up)

(b) Before applying weight (No light)

Energy storing The power generated by the foot step generator can be stored in an energy storing

device. The output of the generator was fed to a 12 V lead acid battery, through an ac-dc

converter bridge. Initially, the battery was completely discharged. Then, the FSEC was operated by

applying foot load and energy was stored in the battery. A 100 W, 230V bulb was connected to the battery through an inverter. The

arrangement is shown in Fig. 4. The duration of lighting, the bulb for number of footsteps and corresponding energy

stored, are given in Table 1. The main objective of developing the FSEC was to demonstrate the technology of

harnessing energy from human walk. Multiple unit clusters may be more useful for producing useable

power. A single cluster with 5 FSEC devices was developed for

experimental purpose.

Fig. 4: Storing Device for Foot Step Electric Energy (a) Bulb on (after charging battery) (b) Bulb off (before charging battery)

No. of foot steps

Duration of lighting a 100 watt 230V bulb(s)

Total energy (J)

Energy/step (J)

250 6 600 2.4

500 12 1200 2.4

750 18 1800 2.4

1000 25 2500 2.5

Table 1: Energy storage by foot steps

A cluster of 5 FSEC devices mounted on a wheeled platform was

developed.

The electrical output of all five FSEC devices is stored in 2 batteries

provided in the platform.

An electronic digital energy meter is fitted on the platform. The energy

generated in each of the five FSEC units fitted in the mobile platform is

integrated and displayed on the energy meter.

The energy meter shows a total integrated value of electrical energy in KJ

generated in all FSECs fitted in the platform.

Multiple FSEC unit clusters

Fig.5. A view of the internal components of a typical FSEC device used in the cluster .

Fig. 6.: Multi Unit FSEC Platform

The platform in Fig.6 is provided castor

wheels, and can be placed at any public place

where there is continuous movement of people.

This unit is designed for persons weighing

50 Kg and above.

The unit is fitted with two 12 V, 26 Amp

lead acid batteries for storing the output energy

from this unit.

Also, an inverter is provided to convert 12 V

DC from battery to 230 V AC supply for

general use.

When a person walks over to the platform, the reading on the energy meter was

observed to be incremented by 3-5 J per step, depending on the weight of the

person.

The output may be further increased by increasing the efficiency of the FSEC

device.

As millions of people are on the move in cities, significant amount of electricity can

be generated by installing these devices at places where the public walk through.

Observations inferred from the above experiment

Footstep electricity generation using PaveGen

Paving slabs that convert energy from people's footsteps into electricity are set to help power

Europe's largest urban mall, at the 2012 London Olympics site.

The recycled rubber "PaveGen" paving slabs harvest kinetic energy from the impact of people

stepping on them and instantly deliver tiny bursts of electricity to nearby appliances. The slabs

can also store energy for up to three days in an on-board battery, according to its creator.

Crowd farm A "Crowd Farm" has been setup by MIT students for

producing electricity from the energy of pounding

feet in crowded places.

Working on the idea to harness human locomotion

power, MIT (USA) architecture students James

Graham and Thaddeus Jusczyk recently unveiled

what they're calling the "Crowd Farm," a setup that

would derive energy from pounding feet in crowded

places.

Population of India and mobility of its masses will

turn into boon in generating electricity from its

(population’s) footsteps.

Human locomotion in over crowded subway stations,

railway stations, bus stands, airports, temples or rock

concerts thus can be converted to electrical energy

with the use of this promising technology. 

Pavement architectural view of Crowd energy farm

A virtual ‘crowd farm’

Working of a crowd farm In a ‘crowd farm’, a responsive sub-flooring

system made up of blocks that depress

slightly under the force of human steps would

be installed beneath the walking lobby.

The slippage of the blocks against one another

as people walked would generate power

through the principle of the dynamo.

The Crowd Farm is not intended for home use

as a single human step can only power two

60W light bulbs for one flickering second

While the farm is over crowded with moving

population, the dynamo-floor principle can be

applied to capture energy at large levels.

Footwear embedded harvesters. This works as follows: droplets of liquid are

placed between electrodes coated in dielectric film.

Both droplets and electrodes are connected to an external electrical circuit.

External movement causes the interface between the droplets and the electrodes to decrease which releases an electrical charge which flows back into the electrical circuit, generating an electrical current.

A tube of a millimeter wide and four millimeters long would contain the electrodes and droplets. In total the device would take up 40cm2 which can be incorporated in the sole of the shoe.

Each foot would generate up to 10W, which is enough to charge a phone or a laptop.

Power generating shoe

Foot step power generation system for rural energy application to run AC and DC loads.

To run AC and DC loads, firstly , the conversion of the force energy into

electrical energy is carried out.

The control mechanism carries the following equipments:-

1. A piezo electric sensor,

2. A.C ripples neutralizer,

3. unidirectional current controller ,

4. 12V, 1.3Amp lead acid dc rechargeable battery and

5. an inverter ,which is used to drive AC/DC loads.

The battery is connected to the inverter. The inverter is used to convert the 12

volt D.C to the 230V A.C. This 230V A.C voltage is used to activate the loads.

A conventional battery unit is used for supplying the circuitry.

Block diagram

Specifications 5V ,500mA power supply.

7805 three terminal voltage regulator => used for voltage regulation.

Bridge type full wave rectifier => used to rectify the ac output of secondary of

230/12V step down transformer.

Sensor used is piezoelectric sensor.

Applications:- The system is particularly useful where grid connections are not feasible or where

there is a requirement for a low carbon solution.

Key applications include :-

powering street lighting,

Displays

Speakers and alarms.

Charging batteries

Signage and advertisements.

busy crossings can now be self

sufficient, increasing the safety of its users with a retro fitted Pavegen slab that

requires no grid connection. The rubber is produced from 100% recycled car tyres.

Conclusion Proposal for the utilization of waste energy of foot power with human locomotion

is very much relevant and important for highly populated countries like India and

China. The whole human/ bio-energy being wasted if can be made possible for

utilization , it will be great invention and crowd energy farms will be very useful

energy sources in crowded countries. Some 28,527 steps, for example, could power

an entire moving train for a second. The Crowd Farm could also be used to harness

the head-bashing energy at a rock concert. Non conventional energy system is very

essential at this time to our nation.

Bibliography www.ieee.org

www.wikipedia.com

http://www.livescience.com/4572-crowd-farm-converts-foots

teps-electricity.html

www.barc.gov.in

web.mit.edu/newsoffice/2007/crowdfarm

Thank you…