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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

EPA Solar Oven Project #05301

Critical Design Review

May 13, 2005

agenda
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
project mission statement
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
needs assessment scope limitations
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
materials selection
Materials Selection*
  • Main Construction Material
  • Reflector Material
  • Cover Material

* CES Selector 4.5

reflector and cover material
Reflector and Cover Material
  • Offset printing plates chosen for reflector
    • Cost
    • Reuse of waste material
  • Acrylic chosen for cover material
    • Durability
testing methodology
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
concept development
Concept Development

Homemade ~$10

Commercial: $120-$220

generation ii a
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)
expert input
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
generation iii
Generation III
  • Thermal analysis
    • Optimal insulation thickness
  • Increased capacity for larger families
  • Cost: $32.33
how did we do
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
recommended future work
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
benefits of solar ovens
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
thanks and questions
Thanks to:

Dr. Carrano

Dr. Thorn

Dr. Mozrall

Mr. Wellin

Dr. Raffaelle

Dr. Nandwani

Carlos Plaz

Chris Wood

Questions?

Thanks and Questions
backup materials
Backup Materials
  • Feasibility Assessment
  • Indoor Test Cell
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