DEM Project: Kenyan Solar Solution Created by: Brian Brosnan, Jason - - PowerPoint PPT Presentation

DEM Project: Kenyan Solar Solution

Created by: Brian Brosnan, Jason Ochs, Tomas Quinteros Amat, Rachel Wiggins

Mission Statement

To provide the poverty-stricken rural population of Kenya with an affordable means of charging personal electronics to a full charge through renewable resources and without the need for significant travel.

Background:

• Target: Rural Nakuru, Central Kenya
• Secondary Market: larger scale, urban areas
• 82% of Kenyans use cell phones
• Climate: arid, drought-stricken

○ Monsoon winds/storms in some parts of country

• Rural Poverty: $0.68/Day
• Design: adjustable, affordable, solar powered
• Goal: fixed yet durable and adaptable product for individual use

Decision Matrix

Prototype 1

***Following final concept selection**** Design for the case, not the mount

Tests:

• Water Resistance
• Debris
• Stress
• Drop Sensitivity
• Weight
• Smash

Prototype 1 Test Results:

Water Resistance Test: waterproof except for one corner Debris Test: mud, dirt, and food residue rinse right off Stress Test: strongest vertically and diagonally with compression Drop Test: no damage until drop from 6ft Weight Test: acrylic can survive compression of 110+ pounds Smash Test: acrylic cannot withstand impact and shatters

Water Resistance Test

• When the case was under running water, water entered

through one corner in drops

• When submerged, bubbles were seen in the same corner

Debris Test

Debris Amount of Debris Visual Observations Hard to Clean? Scale (1- 5) Dirt Cover Acrylic cleans off completely very easy, run under water 5 Mud Cover Acrylic cleans off completely very easy, run under water 5 Coffee Grounds Cover Acrylic Cleans off completely very easy, run under water 5

Stress Test

Position

• f Product

# Turns of Crank Visual Observations Scale (1-5) Horizontal 1 ¼ wood starts to break apart on edge, cracking sound 3 Vertical 3 Glass separating, little bending, hard to turn, warping, cracking sound 4 Diagonal 2 ¾ Warped Acrylic, warped corners, acrylic and wood frame separates on side 2

Drop Test

Height (ft) Visual Observations Scale (1-5) 1 No damage seen 5 2 No damage seen 5 3 No damage seen 5 4 Small Chip breaks off from the bottom 4 5 No damage seen 5 6 Acrylic breaks apart from 3 out of the 4 sides 2

After 6 foot drop

Weight Test

Weight (lbs) Visual Observations Scale (1-5) 25 No changes/ damages 5 50 No changes/ damages 5 75 Starts to depress, dips, no damages 4 100 Dips/ depresses, no damage 3 105.3 Dips/ depresses, no damages 3 110.1 Dips/ depresses, no damages 3

105.3 lbs

Smash Test

After one hit with a hammer

Improvements for Prototype 2

• Adjustment for new solar panel
• Angled Mount
• Polycarbonate Covering (25x+ stronger)
• Waterproofing
• Stronger bond for clear cover

Prototype 2

• Wooden blocks for optimal angles
• Affixed to roof
• 5V 240mAh Panel
• Circuitry: panel, rectifier, USB port,

and voltage regulator

• Screwed-on polycarbonate

Prototype 2 Testing

Pending parts arrival and assembly

Prototype 3

• Plastic material
• Versatility to connect to other power sources
• Rubber waterproofing

How Design Will Benefit the Customer

Frugal - Stays w/in the $10 budget Estimated Cost Breakdown: $9.92

• Rectifier Diodes: 4x $0.50
• Voltage Regulator: $0.58
• USB Port: $0.72
• Solar Panel (5V, 240 mA, 1.2W,

110x 69 mm) : $2.52

• Polycarbonate sheet: $4.10
• Building supplies: FREE
• Simple installation, simple

maintenance

• Easy to shift for optimal power
• Weather tested for tropical climate
• Small Size, Worked into daily lives
• f consumer
• Based on Samsung b310 Piton, a

phone available in Kenya, would charge in ~4 hours of direct sunlight

QUESTIONS

References

"Kenya." Weather & Climate (+ Climate Chart). Safari Bookings, n.d. Web. 09 Sept. 2015. "Population Density Map of Kenya." By BestCountryReports.com. N.p., n.d. Web. 09 Sept. 2015. Central Intelligence Agency. Central Intelligence Agency, n.d. Web. 09 Sept. 2015. "Climate & Agriculture." Our Africa. N.p., n.d. Web. 14 Sept. 2015. "East Africa Living Encyclopedia." East Africa Living Encyclopedia. Web. 14 Sept. 2015. Hanson, Stephanie. "Understanding Kenya’s Politics." Council on Foreign Relations. Council on Foreign Relations, 25 Jan. 2008. Web. 15 Sept. 2015. "Kenya: Unequal Access to the School System | Education for All | DW.COM | 03.05.2012." DW.COM. N.p., n.d. Web. 15 Sept. 2015. "Healthcare in Kenya." Healthcare in Kenya. N.p., n.d. Web. 16 Sept. 2015. "Food Security Report (Prepared by Kenya Agricultural Research Institute | Food Security Portal." Food Security Report (Prepared by Kenya Agricultural Research Institute | Food Security Portal. N.p., n.d. Web. 16 Sept. 2015. "Water In Crisis - Spotlight Kenya." The Water Project. N.p., n.d. Web. 16 Sept. 2015. Central Bank of Kenya - www.centralbank.go.ke Denmark in Kenya - About Kenya - Economy - https://kenya.um.dk/en/about-kenya-new/economy-new/ Index Mundi - Kenya - http://www.indexmundi.com/minerals/?country=ke The World Bank - http://www.worldbank.org/en/country/kenya/overview Trading Economics - Kenyan Shilling - www.tradingeconomics.com/kenya/currency Poverty in Kenya: The Impact of Unemployment, Child Labor, & HIV - http://www.poverties.org/poverty-in-kenya.html solarelectricityhandbook.com/solar-angle-calculato.html Schwartz, Drew. “Polycarbonate (Lexan) vs. Acrylic (Lucite).” 25 Sept. 2015 - http://www.coloradoplastics.com/blog-0/bid/42625/Polycarbonate- Lexan-vs-Acrylic-Lucite

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Reference continued:

Researched Products: http://www.amazon.com/ReStore-Portable-Charging-Rubberized-Exterior/dp/B00E5NK3B4 http://www.amazon.com/smartmo-Portable-Capacity-Electric-Intelligent/dp/B00TDEG13E/ref=sr_1_89? s=wireless&ie=UTF8&qid=1442382227&sr=1-89 http://www.amazon.com/Sunnytech%C2%AE-109ma-Solar-Module-Charger/dp/B00MAYVHHO/ref=sr_1_8? s=wireless&ie=UTF8&qid=1442382171&sr=1-8 http://www.microsoft.com/en/mobile/phone/105/specifications/ http://www.aliexpress.com/item/5V-240mA-1-2W-Solar-Panel-Module-DIY-for-Cell-Charger-Toy-69410/32324831127.html http://www.newark.com/exar/sp7805v-l/ldo-voltage-regulator-1a-5v/dp/24R1322 http://www.newark.com/fairchild-semiconductor/1n4001/diode-standard-1a-50v-do-41/dp/18C8911 http://www.newark.com/te-connectivity/1734366-1/usb-2-0-type-a-plug-th/dp/18M6973 http://www.homedepot.com/p/LEXAN-10-in-x-8-in-Polycarbonate-Sheet-31-GE-XL-1/202090134 http://www.instructables.com/id/Survival-USB-Charger-Use-any-power-source-to-charg/?ALLSTEPS http://www.instructables.com/id/Self-Correcting-Polarity-Protection/ http://www.allaboutcircuits.com/textbook/semiconductors/chpt-3/rectifier-circuits/ https://www.jumia.co.ke/samsung-b310-piton-blue-79156.html