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Renewable energy science fair project:
The Effect of Magnification on Heat in a Solar Oven




Science Fair Project Information
Title: The Effect of Magnification on Heat in a Solar Oven
Subject: Renewable Energy
Grade level: Elementary School - Grades 4-6
Academic Level: Ordinary
Project Type: Experimental
Cost: Low
Awards: 1st place, Canada Wide Virtual Science Fair (2007)
Affiliation: Canada Wide Virtual Science Fair (VSF)
Year: 2007
Description: Two solar ovens were built, one using water lens instead Fresnel lens, and left for one and a half hours in the sun. Then the temperatures inside the ovens were recorded and compared.
Link: http://www.odec.ca/projects/2007/stan7e2/
Short Background

Parabolic solar cookers reach high temperatures and cook quickly, but require frequent adjustment and supervision for safe operation. Several hundred thousand exist, mainly in China. They are especially useful for large-scale institutional cooking.

The solar bowl is a unique concentrating technology used by the Solar Kitchen in Auroville, India. Unlike nearly all concentrating technologies that use tracking reflector systems, the solar bowl uses a stationary spherical reflector. This reflector focuses light along a line perpendicular to the sphere's surface and a computer control system moves the receiver to intersect this line. Steam is produced in the solar bowl's receiver at temperatures reaching 150 C and then used for process heat in the kitchen where 2,000 meals are prepared daily.

Source: Wikipedia (All text is available under the terms of the GNU Free Documentation License)

For More Information: Build Your Own Solar Cooker

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The Solar Car Book
A complete kit for making a cool solar racecar.
Everything is included: wheels, axles, motors, wires and a genuine one-volt solar cell.





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