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Kenya Design Report

Kenya Design Report. By: Kevin LaFevers , Anthony Sabatino , Xiaoming Liang, Richard Wilson. Table Contents. Recognize the Need Problem Statement Mission Statement Customer Needs Assessment Design Specifications Design Aspects Design Ideas Decision Matrix Final Design

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Kenya Design Report

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  1. Kenya Design Report By: Kevin LaFevers, Anthony Sabatino, Xiaoming Liang, Richard Wilson

  2. Table Contents • Recognize the Need • Problem Statement • Mission Statement • Customer Needs Assessment • Design Specifications • Design Aspects • Design Ideas • Decision Matrix • Final Design • Cost Analysis • Summary

  3. Recognize the Need • We recognize the need to provide a stove system that is safe and can be used by the majority of third world countries

  4. Problem Statement • Current cooking systems are inefficient and harmful to users who inhale smoke while cooking indoors • Must be cheap • Limited resources

  5. Mission Statement • We intend on creating a low cost, sustainable, and culturally appropriate cooking system for use by the poor and marginalized people in the developing world.

  6. Customer Needs Assessment • Objectives • Durable • Well insulated • Efficient • Safe • Locally made • Made of local materials

  7. Customer Needs Assessment con’t • Constraints • Cheap • Low emissions • Simple design • Similar in size to current models • Features • Simple fuels • Ability to Upgrade

  8. Design Specifications • The stove must cost less than $20 (U.S.) • It must be able to heat a quart water to 100 degree Celsius in under 10 minutes • It must emit 50% less than current stove systems • It must use 50% less fuel

  9. Design Aspects • Materials were decided upon with efficiency and cost in mind • Insulation material for designs will be a clay shell filled with ash • Ceramic material will be used as a sturdy insulator • A steel shell will enclose the stove for protection

  10. Design Idea 1 • This design features a “bowl-shaped heat exchanging surface” which provides high heat exchange rate and therefore high efficiency, which saves a lot of energy.

  11. Design 1

  12. Design Idea 2 • Uses a simple ceramic pipe as a center • A bowl shaped pot is used for maximum heat transfer • A steel casing is used around the clay • Steel supports are used to lift the bowl off of the stove for ventilation

  13. Design 2

  14. Design Idea 3 • The heat exchange area is cone shaped to increase the heat transfer • Steel supports are used to lift the pot away from the body of the stove to increase airflow • Steel casing for protection

  15. Design 3

  16. Decision Matrix

  17. Selected Design • 12” in diameter, 18” high • 3” Clay shell filled with ash • ½” thick ceramic inner combustion chamber • 1/8”Steel outer shell wrapped around the clay • Fuel pellets

  18. Design Drawings

  19. Cost Analysis • Scrap steel is approximately $.10 per pound • Clay is approximately $.25 per pound • Ceramic chamber is approximately $1.00 per pound • Cost of ash insulation is negligible • In total, steel will be about $1, $3 for clay, $2 for ceramic • Final material cost will be around $6

  20. Summary • We feel this stove system will provide a low cost, sustainable, and safe alternative to currently available systems • The design is simple and utilizes locally available materials, which will allow unskilled workers to manufacture and repair it

  21. References 1. Aprovecho Research Center. "Methods for CApturing Heat." Capturing Heat. Web. 1 Nov. 2009. <http://weblife.org/capturing_heat/>. 2. Bello, Dr. Emmanuel. "The Ceramic Jiko Stove." The Ceramic Jiko Stove Information Page. Web. 3 Nov. 2009. <http://ces.iisc.ernet.in/energy/paper/tech101/jikostove.html>. 3. "Castable Refractory." Castable Refractory. Ellis Custom Knifeworks. Web. 1 Nov. 2009. <http://home.comcast.net/~eellis2/EllisCustomKnifeworks/castablerefractory.html>. 4. "Clean Cookstoves Overview." Envirofit - Making the World Fit for Humanity. Ed. EnviroFit International. Web. 29 Oct. 2009. <http://www.envirofit.org/?q=our-products/clean-cookstoves>. 5. Oliver, Lionel. "Homemade furnace refractories." Melting metal in a home foundry, backyard metalcasting, metal casting. 12 Jan. 2002. Web. 1 Nov. 2009. <http://www.backyardmetalcasting.com/refractories.html>. 6. Renewable and Appropriate Energy Laboratory (RAEL), University of California, Berkeley. "The Kenya Ceramic Jiko." Kenya Ceramic Jiko. Web. 2 Nov. 2009. <http://www.solutions-site.org/kids/stories/KScat2_sol60.htm>.

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