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LE07 – Heather COOPERA2012 Sévenans

Marvell IkoungaThomas Neukirchner

Sylvain Menguy

Lighting devices foremerging countries

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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 presentation1. The solar mosquito-killer lamp2. The Cool Earth Solar system3. The solar bottle bulb

2. Comparisons

3. Choice of one device

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The Solar Lamp Mosquitoes

Killer

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I - The Solar Lamp Mosquitoes KillerI – 1 Components

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I - The Solar Lamp Mosquitoes KillerI – 2 How the light is converted into

electricitySunlight strikes the lamp solar cells

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

Photons alter the trajectory of the electrons, and thus release them

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I - The Solar Lamp Mosquitoes KillerI – 3 How the lamp is charged and

switched onDuring daylight, the solar panels produce

enough power to charge the battery

During the night, the electricity stored make the lamp light on

Circuit using a Photo resistor to switch on the light automatically

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I - The Solar Lamp Mosquitoes KillerI – 4 How the mosquitoes prevention

work

High-voltage electric grid (harmless for children)

Eliminates mosquitos safely and effectively in a non-toxic and non-chemical way

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The Cool EarthSolar system

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II – The Cool Earth Solar system

II – 1 Shape, Dimensions …

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II – The Cool Earth Solar system

II – 2 About the cell…

- 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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II – The Cool Earth Solar system

II – 3 Adding to this a classic DEL lighting …

- 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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The solar Bottle bulb

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III – The Solar bottle bulb

III – 1 What is this process for ?

• 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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III – The Solar bottle bulb

III – 2 How does it work?

• 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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III – The Solar bottle bulb

III – 3 Advantages- 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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ComparisonsPrice – 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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ComparisonsEfficiency

- 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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ComparisonsErgonomic aspects

- CES system : light and aerodynamicbut 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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ComparisonsMaintenance

- 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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ComparisonsProduction

- 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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SourcesSolar bottle bulb :

BBC video : http://www.bbc.co.uk/news/world-asia-pacific-14967535

Informations : 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

Cool Earth Solar system :

Their website : http://www.coolearthsolar.comAn article : http://solar.calfinder.com/blog/products/cool-earth-reshaping-solar-energy-with-balloons/

Solar mosquito-killer lamp :http://home.howstuffworks.com/solar-light2.htmhttp://www.antimoustic.com/http://www.priceminister.com

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LE07 – Heather COOPERA2012 Sévenans

Marvell IkoungaThomas Neukirchner

Sylvain Menguy

Thank you