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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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