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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

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Epa solar oven project 05301

EPA Solar Oven Project #05301

Critical Design Review

May 13, 2005

Team solar oven

Team Solar Oven



  • 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

Ranking of attributes

Ranking of Attributes

House of quality part 1

House of Quality- Part 1

Materials selection

Materials Selection*

  • Main Construction Material

  • Reflector Material

  • Cover Material

    * CES Selector 4.5

Main construction material

Main Construction Material

Main construction material1

Main Construction Material

Wood selection

Wood Selection

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

Three main types of solar ovens

Three Main Types of Solar Ovens




Concept development

Concept Development

Homemade ~$10

Commercial: $120-$220

Generation i four reflector box

$33.64 (Materials)

Generation I: Four Reflector Box

Generation i single reflector box

$15.38 (Materials)

Generation I: Single Reflector Box

Generation i pyramid reflector box

$19.65 (Materials)

Generation I: Pyramid Reflector Box

Generation i performance

Generation I Performance

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 ii b performance

Generation II-B Performance

Generation iii

Generation III

  • Thermal analysis

    • Optimal insulation thickness

  • Increased capacity for larger families

  • Cost: $32.33

Generation iii performance

Generation III Performance

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

Hoq how did we do

HOQ- How Did We Do?

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

Sos solar cooker vs rit solar cooker life cycle impact characterization

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

Sos solar cooker vs generation iii

SOS Solar Cooker vs. Generation III




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


Thanks and Questions

Backup materials

Backup Materials

  • Feasibility Assessment

  • Indoor Test Cell

Feasibility assessment how many prototypes to build

Feasibility Assessment:How Many Prototypes to Build

Feasibility assessment how many prototypes to build1

Feasibility Assessment:How Many Prototypes to Build

Indoor test cell

Indoor Test Cell

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