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 Amount of Visual Hard to Scale (1- Debris Debris Observations Clean? 5) very easy, cleans off Dirt Cover Acrylic run under 5 completely water very easy, cleans off Mud Cover Acrylic run under 5 completely water very easy, Coffee Cleans off Cover Acrylic run under 5 Grounds completely water
Stress Test Position # Turns of Scale Visual Observations of Product Crank (1-5) 1 ¼ wood starts to break apart on Horizontal 3 edge, cracking sound Glass separating, little Vertical 3 bending, hard to turn, 4 warping, cracking sound Warped Acrylic, warped 2 ¾ Diagonal corners, acrylic and wood 2 frame separates on side
Drop Test Height (ft) Visual Observations Scale (1-5) 1 No damage seen 5 2 No damage seen 5 3 No damage seen 5 Small Chip breaks off 4 4 from the bottom After 6 foot drop 5 No damage seen 5 Acrylic breaks apart 6 2 from 3 out of the 4 sides
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 3 105.3 lbs 110.1 Dips/ depresses, no damages 3
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 Simple installation, simple ● maintenance Estimated Cost Breakdown: $9.92 ● Easy to shift for optimal power Rectifier Diodes: 4x $0.50 Weather tested for tropical climate ● ● Voltage Regulator: $0.58 Small Size, Worked into daily lives ● ● USB Port: $0.72 of consumer ● ● Solar Panel (5V, 240 mA, 1.2W, ● Based on Samsung b310 Piton, a 110x 69 mm) : $2.52 phone available in Kenya, would Polycarbonate sheet: $4.10 charge in ~4 hours of direct ● Building supplies: FREE sunlight ●
QUESTIONS
b 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
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
Recommend
More recommend
