Human Power Harvesting1

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Human Power Harvesting is biomechanical energy harvesting from humanmotion leading to clean alternative to electrical power supplied by batteries for

portable electronic devices.

Invented By:

Dr. Sang-Woo Kim ,Institute of Nanotechnology SungkyunkwanUniversity in Seoul, South Korea in late twentieth century.

An average person's energy expenditure, which is the amount of energy used by

the body, is 1.07*107

J per day, an amount equivalent to approximately 2500mAh batteries.

Major countries implementing this are:

India, Korea, South Africa, Japan, China, USA, etc.

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INTRODUCTION


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Ways Of Human Power

Generation

There are basically two ways of harvesting electrical energy from humans :-

ACTIVE

PASSIVE

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Active

Pedal power-

A magnet moving through coils of

metal wire will generate a current.

The average person can produce

around 75-150 Watts from a hand

cranked or bicycle generator.

Stepping or compression

generators

use piezoelectric materials to

generate a current from being

compressed and expanded

repeatedly.

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Contd

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Shaking generators

Inside is a magnet which passes

through coils of wire to generate acurrent which is stored in a battery.

Stretch/Pull, Push, Weight)

Generators

use any kind of human motion you

can imagine. Yo-yos can generate

electricity, weight lifting, opening

doors, etc.


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PASSIVEBreathing to electrical energy

The airflow of normal human

respiration is typically below about

two meters per second, small

vibrations could produce a microwatt

of electrical energy that could beuseful for sensors or other devices

implanted in the face.

Body heat to electrical energy

These devices function with the useof your body heat. They use metals,semiconductors, and ceramics tocreate devices that exploit a heatdifferential.

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Contd

Heartbeat, blood flow inside thevessels:-

Different types of sensors are employed,such as for sensing the energy from theheartbeat the piezoelectric and

semiconducting coupled nanowires areused that convert the mechanical energyinto electricity.

Human Voice to electrcity:-

It uses microscopic strands of zinc oxideplaced in between 2 electrodes. A soundabsorbing pad on top vibrates when hit bythe sound waves causing the zinc oxidewires to compress,release n vibrate against

pad producing electrical current.

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Facts The average human who has 15% body fat can produce 11 kilowatt of

energy.

For harvesting you have approximately 128 watts when you stand, 163

watts when you walk normally, and 407 watts when you walk quickly.

If you are a long distance runner, you have about 1kilowatt available.

Being asleep you are still useful; then you contribute 81 watts of

power.

Of course the available energy production varies according to age,

weight, gender, and health. 20 minutes of cycling equals charge a cellphone

4 minutes of running could run a watch for life

3.35 MJ of energy/day is used to perform activities.

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Comparison of various forms

of energy generationsHydro Thermal Nuclear Human

Power

Harvesting

Investments

per kW

High Lower Very High Lowest

Fuel Cost Very High Low - None

Energy Cost Low High Very High Lowest

Environmental

Impact

Reservoir Atmosphere Radio Activity None

Green House

Effect

Lower High None None

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APPLICATIONSGreen Gym

players can generate for 250 W

for 15 minutes in rowing

machine.

6players x 250 = 1500 W

A treadmill actually consumes

1500W of energy to run motor,so six players in rowing can

provide this energy

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Contd

POWER TILES:-

Tokyo Station where peoplewalk on piezoelectric tiles which

in turn generate electricity.

everyday e.g. 2.4 millionpeoplepass through the sprawlingShibuya Station

An average person, weighing 60kg, will generate only 0.1 watt inthe single second required totake two steps across the tile.

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Contd..

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Contd..

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Powered Road:-

Californiahighways may

soon produce their

own power.


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Contd

Golf and Cricket Power:

A golf, cricket, tennis or

baseball player uses a lot of hisor bat, racket or base back andforth.

can her energy in swinging theclub, charge the cell phone,

laptops and other gadgets later

The device is initially designedfor golf players by MacFunamizu

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Little power can also be a boon..

NURU LIGHTS headed by Canadian-born social

entrepreneur Sameer Hajee,whose roots are in India and

Kenya. aims to prevent emission of about

40,000 tons of CO2 fromkerosene lighting in 2010

the field testing in Rwanda, apilot project is underway in

Madhya Pradesh and Orissa andabout 300,000 units will be inplace there by year end

deliver lighting to about 200,000households.

Costs 250 Rupee.

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Human power harvesting in INDIA

"Anything that moves can be used to generate power & theonly thing needed is will, and creativity. -Chandrakant Pathak

He has modified power-consuming gadgets of every-dayuse, like motor pumps, f lour mills and even electric

vegetable shreddersto run on manual power.

In 1995, Pathak started his own institute, the ModernTechnical Centre, in Pune,with the aim of devising gadgetsfor power self-sufficiency in rural areas.

Pathaksproducts are popular in the Sangli, Satara, Solapur,Latur and Pune districts and also parts of Vidarbha.

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Bicycle-powered pump developed

by Chandrakant Pathak Some of the pumps are

powerful enough to drawwater from a depth offifty feet and pump it upto a height of 100 feet.Anything between 15-40litres of water can be

pumped per minute.

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PROS CONS

Can partially alleviate the currentenergy crisis.

Generates less amout of electricity ascompared to other sources.

Provides a green technology to theenvironment.

Excessive work may harm humans.

Guarantees power supply duringnatural calamities.

Encourages people.

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Our Ideas.Charging Laptop by typing as well as charging ipads by

touching .

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How this can be implemented?

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A property that certain materials can

generate an electric current when they are

squeezed or pressed. For example, lead

zirconate titanate crystals will generate

measurable piezoelectricity when their

static structure is deformed by about 0.1%of the original dimension.

sheet of this material can be arranged

below the keyboard key , touch pads or

behind the screen of ipad, whenever a

person will type or touch the scree it willexert pressure which will deform this

material sheet and that pressure can be

converted to electricity, for charging


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Our ideasPeople walking on skywalks can generate electricity for

ligthing the skywalk.

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Approximately during theentire 20 day period of the

installation, it can generate

enough electricity to power

1,422 televisions for onehour.


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Conclusion

Human power requires no fuel meaning:

No geopolitical risk,

No external energy dependence, No extraction or refining

No resource constraints

No CO2 emissions

Therefore, human energy is a great alternative forenergy!

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References http://www.brighthub.com/environment/renewable-

energy/articles/41213.aspx

http://www.engr.wisc.edu/news/archive/2011/Oct11.html http://scholar.lib.vt.edu/ejournals/JOTS/v35/v35n1/pdf/yil

diz.pdf iprojectideas.blogspot.com/2010/06/human-power-

harvesting.html

[PDF] eh-network.org/files/human_power.pdf

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Any Question..

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Human Power Harvesting1