Cornell Solar Oven Team Amanecer

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Cornell Solar Oven TeamAmanecer
End of Semester Presentation December 4, 2006

• CEE 492 - Engineers for a Sustainable World

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Team Organization
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Presentation Outline

• Introduction and Project Background
• Project Description
• Solar Oven Building
• Light Simulation System
• Testing and Analysis
• Social and Environmental Impact
• Planning and Scheduling
• Resources and Needs

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Introduction

• Problems
• Health risk of gathering and burning wood
• Deforestation
• Demand for new resources of fuel
• Proposed solution
• Solar cookers integrated into the community of
  Sabana Grande that maximize sustainability of
  domestic cooking by replacing wood
• Mindful of the financial and material
  restrictions of the local community

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Past Semesters

• Three Functioning Box Cookers
• Previous Parametric Testing
• Nicaraguan Contacts and Research
• Trip to Nicaragua

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Organizations

• STEVEN Foundation
• Grupo Fenix
• ESW SEED Program

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Manual

• Translation of the Mujeres Solares manual
• Modified and updated the manual
• Implementation of a lettering system for each
  piece of wood used
• Modified and added figures
• Modified glazing technique

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Oven Construction

• Phase 1 Material preparation
• Gathered all materials needed
• We cut and labeled each piece of wood that wood
  be needed
• Phase 2 Exterior box
• Built frame
• Nail Zinc sheet to base and three sides

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Oven Construction

• Phase 3 Inner Box
• Cut cardboard walls to hold the wood curl
  insulation
• Nailed in an aluminum sheet to be used as the
  inner wall of the oven

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Oven Construction

• Phase 4 Glazing
• New glazing technique
• Phase 5 Black Plate
• Cut and painted metal sheet

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Glazing

• Problems
• Cracking
• Removal
• New Design
• Frame
• Glass
• Caulking
• Felt

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Light System

• Suns Spectrum
• Simple apparatus to test spectrums

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Light System
500w Halogens

• We tested several types of lights
• Florescent
• Halogens
• Incandescent

Halogens Flood lights
Florescent
Incandescent
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Spectrum comparison
Extent of created spectrum
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Intensity

• The sun produces 1000 w/m2
• Light system suns intensity 36 bellow lights
• Intensity at the center is 2.5 times gt then at
  edges

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Light setup

• 5 halogen lamps, with flood lights at two
  diagonals.
• Ovens elevated
• 31 from the light

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Testing the Ovens

• Sunlight Intensity
• Pyranometer
• Watts/m²
• Temperature
• Thermocouples
• Degrees Celsius

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Test 1 Empty Ovens

• Both ovens were placed under the light system.
• Pyranometer placed in between both ovens
• Thermocouples
• Black plate (bottom)
• Air space (middle),
• Glass (top).

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Test 1
Oven 1
Oven 2
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Test 2 Empty Ovens

• Same thermocouple setup
• 2 pyranometers used

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Test 2 Empty Ovens
Oven 1 around 425 Watts/m² Oven 2 around 500
Watts/m²
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Test 2
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Test 3 Ovens with Water

• 2Kg water placed in pot in each oven
• 4 Thermocouples were used
• Bottom of oven
• In water
• Ovens about even in water and bottom surface
• Oven 2 bit higher

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Test 3
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Carbon Credit

• Kyoto Protocol
• Carbon credit
• Trading- where
• Joint implementation, Clean Development
  Mechanism, International Emission trading
• CDM approval

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Current Technologies

• Projects approved
• Wind farms
• Hydro-electricity generation
• Bio-energy
• Countries involved
• India
• New zealand
• Austrailia

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Carbon Emissions

• Nicaragua solar ovens
• One ton of wood (one cord) releases 2 tonnes
  (4000 pounds) of carbon dioxide
• Each tonne of carbon dioxide expected to earn 12
  - 15.
• Majority use ovens to roast coffee
• 3 logs of wood required to roast coffee per week
• Therefore approximately 10 houses burn one cord
  of wood in a year for roasting coffee.
• But 10 logs of wood needed to cook food for a day
  per household.
• Each household uses 2.3 cords of wood per year
  for cooking

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Research

• Coffee tasting experiment

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Sustainability

• Community Development
• Social Sustainability
• Global Sustainability
• Responsibility
• Personal Responsibility
• Group Responsibility

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Project Schedule

• 1st Semester delays
• Up to date plans
• Translation
• Communication with Grupo Fenix
• Accomplished a lot!

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Transition Plan

• Recruit new members to keep number of active team
  members constant
• Look for underclassman
• Begin active building and testing in January
• Continue Community Outreach
• HO Plaza
• Cornell World Fair

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Visit Nicaragua

• Prepare for trip to Nicaragua
• Design modifications
• Exchange Knowledge
• Project Sustainability
• Develop new testing center
• Collaborate with community

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Webpage
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Questions