This link leads to a PDF entitled "Investigation of Reflective Materials for the Solar Cooker" by John Harrison of Florida Solar Energy Center (December 24, 2001). It is a 21 page report that reviews materials that can be used for solar cookers.
Interestingly, item #11 talked about in the report is Aluminum foil (heavy duty). The material specifically reviewed is Reynolds Wrap® Aluminum Foil. On page 7 of the report, this foils connection to Louisville, Kentucky is described. U.S. Foil Company was found in Louisville in 1919. The company would be the parent to Reynolds Metals Company. Rolled aluminum foil used as packaging was developed in 1926. The foil used today is of 8111 alloy aluminum (98.5% content) with silicon and iron added for strength.
Aluminum foil is the most popular material used for solar cookers due to its low cost and availability. It does have issues in being fragile being so thin and can develop a aluminum oxide film when exposed to moisture. Holes can form in the foil as well when exposed to acidic or salted foods.
Learn more about solar cookers and their research at this web site.
Tuesday, September 7, 2010
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