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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

EPA Solar Oven Project #05301

Preliminary Design Review

February 18, 2005

team solar oven
Team Solar Oven

05301 EPA Solar Oven

agenda
Agenda
  • Introduction
  • Needs Assessment
  • Specifications/Requirements
  • Feasibility Assessment
  • Materials Selection
  • Concept Development & Designs
  • Testing Methodology
  • Future Work
  • Questions

05301 EPA Solar Oven

why solar ovens
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

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

Note: Objective is not to reinvent the wheel, rather to make it suitable for use in rural Latin America

05301 EPA Solar Oven

needs assessment
Needs Assessment
  • Scope Limitations
  • Order Qualifiers
  • Order Winners

05301 EPA Solar Oven

scope limitations
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

scope limitations cont d
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

order qualifiers
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

ranking of attributes
Ranking of Attributes

05301 EPA Solar Oven

order winners top 5 attributes
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

house of quality
House of Quality

05301 EPA Solar Oven

materials selection
Materials Selection*
  • Main Construction Material
  • Reflector Material
  • Cover Material

* CES Selector 4.5

05301 EPA Solar Oven

main construction material
Main Construction Material

05301 EPA Solar Oven

main construction material1
Main Construction Material

05301 EPA Solar Oven

wood selection
Wood Selection

05301 EPA Solar Oven

reflector material
Reflector Material

05301 EPA Solar Oven

reflector material1
Reflector Material

05301 EPA Solar Oven

cover material
Cover Material

05301 EPA Solar Oven

materials chosen
Materials Chosen
  • Main Construction Material
    • Particleboard
  • Reflector
    • Aluminum sheet (reused)
  • Cover
    • Acrylic

05301 EPA Solar Oven

three main types of solar ovens
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

advantages disadvantages
Advantages/Disadvantages

05301 EPA Solar Oven

concept development
Concept Development

Homemade ~$10

Commercial: $220

05301 EPA Solar Oven

concept screening process
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

results of voting
Results of Voting

05301 EPA Solar Oven

four reflector box
Four Reflector Box
  • Rear access door
  • Proven design
  • Good insulation
  • Large reflectance area

Total Material Cost: $33.64

Box Type

05301 EPA Solar Oven

single reflector box
Single Reflector Box
  • Good insulation
  • Light weight
  • Portable
  • Inexpensive
  • Retains heat (lid)

Total Material Cost: $15.38

Box Type

05301 EPA Solar Oven

pyramid reflector box
Pyramid Reflector Box
  • Simple to build
  • Light weight
  • Portable
  • Large reflectance area

Total Material Cost: $19.65

Panel/Box Type

05301 EPA Solar Oven

testing methodology
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

future work
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

thanks and questions
Thanks to:

Dr. Carrano

Dr. Thorn

Dr. Raffaelle

Carlos Plaz

Mr. Wellin

Dr. Mozrall

Chris Wood

Questions?

Thanks and Questions

05301 EPA Solar Oven