Parabolic solar cookers
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Parabolic Solar Cookers. Lonny Grafman Most Images from Appropedia Outline Background Basics Design Examples More Examples Math and Physics Resources Discussion. 100 0 watts/m 2. Solar Box Cooker a ka Solar Oven. Solar Parabolic Cooker. The Parabola. y=a x 2 f=1/(4a). y. f. x.

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Parabolic solar cookers

Parabolic Solar Cookers

  • Lonny Grafman

  • Most Images from Appropedia

  • Outline

    • Background

    • Basics

    • Design Examples

    • More Examples

    • Math and Physics Resources

    • Discussion


Parabolic solar cookers

  • 1000 watts/m2


Parabolic solar cookers

  • Solar Box Cooker

  • aka Solar Oven


Parabolic solar cookers

  • Solar Parabolic Cooker


Parabolic solar cookers

  • The Parabola


Parabolic solar cookers

y=ax2

f=1/(4a)

y

f

x


The parabola definition

The Parabola - Definition

http://www.cut-the-knot.org/ctk/Parabola.shtml#Theorem1


The parabola reflection

The Parabola - Reflection

http://www.cut-the-knot.org/ctk/Parabola.shtml#Theorem1


Parabolic solar cookers

  • The Paraboloid

  • The Parabola


Parabolic solar cookers

  • Design Criteria:

  • Use of local materials

  • Efficiency

  • Durability

  • Ease of use

  • Ease of construction

  • Cost

  • Impact on environment

  • Impact on lifestyle

Design Objective:

To create a solar cookerfrom local invasive species and waste materials that can pasteurize water and be a cooking alternative to the use of fossil fuels.


Parabolic solar cookers

  • Results:

  • Equation: y =.5x2

  • Time to boil quart: ~2 hrs

  • Deformation Lessons Learned:

  • more blackberry runners

  • more rigid material for rings

  • Reflectivity Lessons Learned:

  • pampas grass too lumpy

  • no dull, small can lids


Protection from dazzles and burns

Protection from Dazzles and Burns

  • Appropriate focal point size

  • Glasses and gloves

  • Deep dish focus

  • Physical barrier

  • Physical separation

  • Appropriate system size


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