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EPA Solar Oven Project #05301

EPA Solar Oven Project #05301. Preliminary Design Review February 18, 2005. Team Solar Oven. Agenda. Introduction Needs Assessment Specifications/Requirements Feasibility Assessment Materials Selection Concept Development & Designs Testing Methodology Future Work Questions.

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EPA Solar Oven Project #05301

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  1. EPA Solar Oven Project #05301 Preliminary Design Review February 18, 2005

  2. Team Solar Oven 05301 EPA Solar Oven

  3. Agenda • Introduction • Needs Assessment • Specifications/Requirements • Feasibility Assessment • Materials Selection • Concept Development & Designs • Testing Methodology • Future Work • Questions 05301 EPA Solar Oven

  4. Why Solar Ovens? • Average Latin American Country • 35% of the population is below the poverty line and lives in rural areas • Majority cook with firewood • Limited use of solar ovens 05301 EPA Solar Oven

  5. Project Mission Statement • Design, test, and build a low-cost solar oven for use in Latin American countries using locally available resources, mass production methods, and labor Note: Objective is not to reinvent the wheel, rather to make it suitable for use in rural Latin America 05301 EPA Solar Oven

  6. Needs Assessment • Scope Limitations • Order Qualifiers • Order Winners 05301 EPA Solar Oven

  7. Scope Limitations • Design should only incorporate locally available resources, production methods, and labor • Design should be mass-producible • Design must be durable • Design must be able to cook food and pasteurize water • Must perform user testing to ensure ease of use 05301 EPA Solar Oven

  8. Scope Limitations (Cont’d) • Design must be benchmarked against three commercially available units • Thermal analysis must be conducted on prototypes • With Graduate student assistance • Economic, social, environmental impact • Lifecycle and durability analysis 05301 EPA Solar Oven

  9. Order Qualifiers • Inexpensive method • Locally produced (labor and production methods) • Decrease need for firewood • Decrease the rate of deforestation • Decrease CO2 emissions • Minimize the exposure to smoky conditions 05301 EPA Solar Oven

  10. Pairwise Comparison of Attributes 05301 EPA Solar Oven

  11. Ranking of Attributes 05301 EPA Solar Oven

  12. Order Winners: Top 5 Attributes • Inexpensive design • Heats up quickly • Reaches temperatures necessary to cook food and pasteurize water • Easy to use • Durable 05301 EPA Solar Oven

  13. House of Quality 05301 EPA Solar Oven

  14. Feasibility Assessment:How Many Prototypes to Build 05301 EPA Solar Oven

  15. Feasibility Assessment:How Many Prototypes to Build 05301 EPA Solar Oven

  16. Materials Selection* • Main Construction Material • Reflector Material • Cover Material * CES Selector 4.5 05301 EPA Solar Oven

  17. Main Construction Material 05301 EPA Solar Oven

  18. Main Construction Material 05301 EPA Solar Oven

  19. Wood Selection 05301 EPA Solar Oven

  20. Reflector Material 05301 EPA Solar Oven

  21. Reflector Material 05301 EPA Solar Oven

  22. Cover Material 05301 EPA Solar Oven

  23. Materials Chosen • Main Construction Material • Particleboard • Reflector • Aluminum sheet (reused) • Cover • Acrylic 05301 EPA Solar Oven

  24. Three Main Types of Solar Ovens Box* Panel** Parabolic* *http://www.exoticblades.com/tamara/sol_cook/types.html **http://www.solarcooking.org/plans.htm 05301 EPA Solar Oven

  25. Advantages/Disadvantages 05301 EPA Solar Oven

  26. Concept Development Homemade ~$10 Commercial: $220 05301 EPA Solar Oven

  27. Concept Screening Process • Generated concepts • Six box types • Three features to add to any design • One stand to hold cooker • One pyramid cooker • Structured Voting Technique with team members and project sponsor 05301 EPA Solar Oven

  28. Results of Voting 05301 EPA Solar Oven

  29. Four Reflector Box • Rear access door • Proven design • Good insulation • Large reflectance area Total Material Cost: $33.64 Box Type 05301 EPA Solar Oven

  30. Single Reflector Box • Good insulation • Light weight • Portable • Inexpensive • Retains heat (lid) Total Material Cost: $15.38 Box Type 05301 EPA Solar Oven

  31. Pyramid Reflector Box • Simple to build • Light weight • Portable • Large reflectance area Total Material Cost: $19.65 Panel/Box Type 05301 EPA Solar Oven

  32. Testing Methodology • Determine angle of reflectors • Square 1 software • Laser Testing • Mimic sun’s energy • Create indoor setup • Array of 9 projection lamps (300 Watts each) • Calibrated solar cell • Thermocouples • Test prototypes outside • Thermocouples 05301 EPA Solar Oven

  33. Picture of Indoor Testing Stand 05301 EPA Solar Oven

  34. Future Work • Calibrate testing equipment • Conduct tests and analyze data • Use HOQ to determine winning prototype • Combine features and optimize materials • Possibly build new prototype • Field test in Venezuela • Utilize field test results, possibly redesign 05301 EPA Solar Oven

  35. Thanks to: Dr. Carrano Dr. Thorn Dr. Raffaelle Carlos Plaz Mr. Wellin Dr. Mozrall Chris Wood Questions? Thanks and Questions 05301 EPA Solar Oven

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