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EPA Solar Oven Project #05301

EPA Solar Oven Project #05301. Critical Design Review May 13, 2005. Team Solar Oven. Agenda. Project Mission Statement Needs Assessment and Requirements Materials Selection Testing Methodology Types of Solar Ovens Concept Development/Selection Three Generations and Their Performances

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EPA Solar Oven Project #05301

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  1. EPA Solar Oven Project #05301 Critical Design Review May 13, 2005

  2. Team Solar Oven

  3. Agenda • Project Mission Statement • Needs Assessment and Requirements • Materials Selection • Testing Methodology • Types of Solar Ovens • Concept Development/Selection • Three Generations and Their Performances • Environmental Assessment • Questions

  4. 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

  5. Needs Assessment: Scope Limitations • Design must be ultra low cost • 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 • Design must be benchmarked against three commercially available units • Thermal analysis must be conducted on prototypes

  6. Ranking of Attributes

  7. House of Quality- Part 1

  8. Materials Selection* • Main Construction Material • Reflector Material • Cover Material * CES Selector 4.5

  9. Main Construction Material

  10. Main Construction Material

  11. Wood Selection

  12. Reflector and Cover Material • Offset printing plates chosen for reflector • Cost • Reuse of waste material • Acrylic chosen for cover material • Durability

  13. Testing Methodology • Determine angle of reflectors • Square One software • Laser Testing • Mimic sun’s energy • Create indoor setup • Calibrated solar cell • Test prototypes outside • Thermocouples

  14. Three Main Types of Solar Ovens Box Panel Parabolic

  15. Concept Development Homemade ~$10 Commercial: $120-$220

  16. $33.64 (Materials) Generation I: Four Reflector Box

  17. $15.38 (Materials) Generation I: Single Reflector Box

  18. $19.65 (Materials) Generation I: Pyramid Reflector Box

  19. Generation I Performance

  20. Generation II-A • Trip to Venezuela • Fabricated 2 units • Single-paned acrylic • Double-paned acrylic • Tested outdoors • Performance • Reached water pasteurization temperatures 65C (149F)

  21. Expert Input • Dr. Nandwani • International Expert on Solar Cooking • Materials and Designs • Utilize glass not acrylic • Suggested suitable insulation materials • Optimal thicknesses • Generation II-B • Retrofitted Generation II-A unit

  22. Generation II-B Performance

  23. Generation III • Thermal analysis • Optimal insulation thickness • Increased capacity for larger families • Cost: $32.33

  24. Generation III Performance

  25. How did we do? • One fourth the price of the cheapest commercial unit: $29.33 (materials + labor) vs. $121.94 • Full price, $32.33, includes a WAPI ($3) • A device to tell if water has been pasteurized • Reaches cooking and water pasteurization temperatures • Uses 36% reuse materials

  26. HOQ- How Did We Do?

  27. Recommended Future Work • Slant oven so more direct sunlight hits pot(s) • Research optimal number of glass panes • Explore sealants for weatherproofing • Replace the main construction material, MDF, with a less dense material with similar or better thermal properties to reduce weight

  28. SOS Solar Cooker vs. RIT Solar Cooker Life Cycle Impact(Characterization)

  29. SOS Solar Cooker vs. Generation III 81% 84% 67%

  30. Benefits of Solar Ovens If 1,000 solar ovens are used year-round by families of six, this would save approximately… • FIREWOOD 17,000 Tons • CO2 6,300 Tons • CO 300 Tons • FUEL 9 Million Lbs

  31. Thanks to: Dr. Carrano Dr. Thorn Dr. Mozrall Mr. Wellin Dr. Raffaelle Dr. Nandwani Carlos Plaz Chris Wood Questions? Thanks and Questions

  32. Backup Materials • Feasibility Assessment • Indoor Test Cell

  33. Feasibility Assessment:How Many Prototypes to Build

  34. Feasibility Assessment:How Many Prototypes to Build

  35. Indoor Test Cell

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