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Report
WORLD ENGINEERING
CONFERENCE ON SUSTAINABLE
INFRASTRACTURE 2O14
YOUNG ENGINEERS PROGRAMME
ABUJA –NIGERIA 2-7 NOVEMBER 2014
AUTO-RUN CELL
PHONE
‘‘HARNESSING ENERGY WITHIN
THE DEVICE”
UNIVERSITY OF NAIROBI,
KENYA
GEORGE OUMA OTIENO
BSC IN ELECTRICAL AND INFORMATION ENGINEERING
FIFTH YEAR
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ABSTRACT
The Auto-run Cellphone is a project that addresses the issue of quick battery
discharge in smartphones due to the many applications that run. The project solves
this generating electrical energy for charging while mobile is being used.
This is achieved by a pretty small wireless device that is mounted at the back of
the phone to act as a charger. It uses energy from the radiation caused by the
Radiofrequency from the Base Transceiver Station (BTS) while communication is
taking place. The device does the conversion and regulation of the Voltage and
Current to achieve mobile charging specifications.
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Contents
• Scope
• Methodology
• Discussion
•
•
•
•
•
•
Technology
World Population
Energy
The General Picture
Communication Process
• The Idea
• The Process
• First Prototype
• Beneficiaries
• Advantages
• Challenges
• Cost Benefit Analysis
• Conclusion
Mobile Site
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Scope
• Energy Consumption for charging mobile phones in Africa
• Alternative and sustainable mobile phone charging for reduced energy
consumption
• Generating 2W-5W range of electrical power for charging
• Prototype and its operation
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Methodology
• Detection of the radio frequency waves
• Converting the radio frequency to electrical energy using the device
monopole antenna
• Stabilization or regulation to universal standard of 4-6V, 100mA-1000mA
• Connection to charging system
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Discussion
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Technology
• Living in the age of: • Cellphones
• Tablet
• Hand-held devices
• Computers
• Wireless Devices
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World Population
•
•
•
•
7.125billion people in the world in 2013 (Source: World Bank)
Population Growth Rate projected to be 1.2% annually
Africa’s Population is 2nd largest in the World after Asia.
Africa has 15% of the world’s population, approximately 1.068billion
people
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Energy
• Technology requires energy to drive it.
• Main source of energy in Africa is Electrical Energy.
• Other sources of power – solar, wind – currently expensive and out of reach of
most.
• Power Generation in Africa mainly Hydro and Geothermal
• Global warming has affected weather patterns which has affected power
generation
• This leads to inadequate power generation therefore most countries in Africa
experience, Black Outs, Power Rationing, etc
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Energy Cont’…
• Assuming 70% of Africa’s Population each has a mobile device
• 70% of 1.068billion = 0.75billion people
• Maximum Power required to charge a mobile phone is approximately 5W
• Therefore, total power required for charging is: • 0.75billion * 5W = 3.75GW
• Demand is too HIGH!
• Alternative means of charging phones needs to be found.
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The General Picture
Electrical energy is a precious commodity that needs to be
CONSERVED at all costs.
Alternative, Sustainable and Affordable means of charging cell
phones in Africa must be found.
HARNESSING radiofrequency waves; CONVERT to electrical
energy; REGULATING the energy; CHARGING of cellphone.
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Communication Process
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Mobile Site
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The Idea
The principle behind this invention is based on harnessing the
radiated electromagnetic waves from the cellphone antenna
Formation of magnetic field around the antenna will lead to
generation of electrical energy
The electrical energy generated is the power that charges your cell
phone
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The Idea cont’...
Not all radio frequency waves are to be converted, just about 70% of it.
The charging takes place when you: •
•
•
•
receive a call
make a call
send a text and
while browsing
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Process Summary
Detection of Radio
Frequency
Conversion &
Regulation
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Charging
(connection to
charging system)
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Findings
ITEM
VOLTAGE, V
CURRENT,
mA
POWER, W
1st Prototype
4
225
0.9
2nd Prototype
5
400
2
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REMARKS
Insufficient
Sufficient
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Beneficiaries
Mobile Phone Users.
Hand Held Computers.
Any wireless communication device
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Advantages
No charger required.
Gives your phone energy especially when you need.
Your phone can run for a good number of days without ac plug
in.
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Challenges
Some mobile phones are not compatible with this system.( more
research)
Efficiency reduction in some mobile phone devices.
Causes overheating in other phone devices ( Motorola, Huawei)
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Cost Benefit Analysis
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ITEM
DESCRIPTION
QTY
UNIT
COST
(KSHS)
AMOUNT
1
Hardware Design
1
Lot
1,000.00
1,000.00
2
Hardware Fabrication
1
Lot
800.00
800.00
3
Scaling of Prototype
1
Lot
500.00
500.00
TOTAL COST
Assuming $1 = KSHS. 87.00, Total Cost
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2,300.00
$26.00
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Conclusions
• Cost of Energy Generation and Consumption in Africa is high.
• With Alternative, Affordable and Sustainable means of charging cellphones,
the energy can be diverted to other uses.
• The Auto-run Cellphone invention will ensure energy is sustained, conserved
and is affordable to most.
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THANK YOU
Email: [email protected]
Mobile: +254713062731
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