Lighting devices for
emerging countries
LE07 – Heather COOPER
A2012 Sévenans
Marvell Ikounga
Thomas Neukirchner
Sylvain Menguy
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About the Project …
• Lighting devices
• Dedicated for people in the developing world
• Meet many criteria :
– Being affordable (not expensive or high return on investment)
– Easy to use and install, strong and durable
– Made from commonly materials
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Plan
1. Devices presentation
1.
2.
3.
The solar mosquito-killer lamp
The Cool Earth Solar system
The solar bottle bulb
2. Comparisons
3. Choice of one device
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Sunlight strikes the lamp solar cells
Photons alter the
trajectory of the electrons,
and thus release them
N-type silicon has free electrons, the same
released previously. P-Types silicon has free holes.
When N-type and P-Type silicon come into
contact, an electric field forms within the cell
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During daylight, the solar panels produce
enough power to charge the battery
Circuit using a Photo resistor to
switch on the light automatically
During the night, the electricity stored
make the lamp light on
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High-voltage electric grid
(harmless for children)
Eliminates mosquitos safely and effectively
in a non-toxic and non-chemical way
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- Generates 300 to 400
times the electricity of a
classic cell
- Only one cell
- Need a cooling system
(water-cooling system)
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- 5 Watt DEL lamp = 60 Watt incandescent bulb
- Lifespan : more than 50 000 hours
- CES system could provide 200-300 Watts, it
could supply 40-60 DEL lamps at the same time
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•
Provide light to houses which are
windowless
•
Give light to that homes which are
not economically capable to buy
electricity
•
Light up dark areas in your home
during daytime
•
After installation on the roof, the
water will reflect the light in every
direction instead of spotting it only at
one point (diffused light)
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• Sunlight is refracted by the water
• Water refracts the light from above
to below into the darkness
• The light spreads out around the
room
 Principle of refraction (the light,
when entering into water, changes
direction and spreads light in every
direction).
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- It diffuses light in every direction (more
powerful than some electric bulbs)
- Lifespan of five years
- Very useful by sunny weather / in sunny
countries
- Very cheap
- Easy to assemble
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Comparisons
Price – Return on Investisment
- CES system :
- balloon (1 €)
- 1 DEL lamp : 5 €
- Global system (cell, coolling system and structure) : 30 €
- Solar lamp : 15 €
- Bottle bulb : 1 €
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Comparisons
Efficiency
- Solar lamp : 10 m² = 3-4 meters around
- Bottle bulb : equivalent to a 60W bulb
- CES system : can supply 40 to 60 DEL Lamps at the
same time
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Comparisons
Ergonomic aspects
- CES system : light and aerodynamic
but big size
- Bottle bulb : quite small but static
- Solar lamp : portable with a handle. Can be a
static and a moving lighting device and can lights
during the night (battery). Kills mosquitoes.
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Comparisons
Maintenance
- CES system : Change the balloon every year
- Solar lamp : no maintenance, just needs to be
cleaned and to change batteries
- Bottle bulb : Change every 5 years
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Comparisons
Production
- CES system : can’t be built in emerging country
- Solar lamp : can’t be built in emerging country
- Bottle bulb : Easy to build everywhere with simple
plastic bottle and metal (20 minutes)
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Choice
The solar bottle bulb
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Sources
Solar bottle bulb :
BBC video :
Informations :
http://www.bbc.co.uk/news/world-asia-pacific-14967535
Cool Earth Solar system :
Their website :
An article :
http://www.coolearthsolar.com
http://techledger.wordpress.com/2011/07/14/solar-bottle-bulb/
http://www.instructables.com/id/How-to-build-a-SOLAR-BOTTLE-BULB/
http://ollengg.blogspot.fr/2012/07/technology-has-no-ends.html
http://solar.calfinder.com/blog/products/cool-earth-reshaping-solar-energy-with-balloons/
Solar mosquito-killer lamp :
http://home.howstuffworks.com/solar-light2.htm
http://www.antimoustic.com/
http://www.priceminister.com
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Thank you
LE07 – Heather COOPER
A2012 Sévenans
Marvell Ikounga
Thomas Neukirchner
Sylvain Menguy
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