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Fresnel lens furnace
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Build a furnace with a plastic fresnel lens that can melt copper enamel.
Parabolic trough solar collector
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Overview
In a parabolic trough collector, a long pipe containing water is located along a focal line. Build this collector carefully and you will have a steam generator or high temperature water heater. You can also use it as an experimental apparatus to explore tracking drives, glazed absorber tubes, heat pipes and much more.
Equitorial Sundial
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Construct a sundial that accurately tracks the sun and time throughout the year.