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Boiling Noodles using the sun and materials found in the garbage
I am traveling around the world and trying to teach people in poor communities how they can build their own solar thermal technology. I am currently in La Paz Mexico testing different applications and building material for solar thermal devices.
For this project I wanted to build a solar cooker using only garbage. I found some strong cardboard in the garbage as well as a cereal box and a small piece of plywood. I cut out two parabola shapes from the thick cardboard and then bend the cereal box to form a curved surface. I covered the cereal box in tin foil (I have also used chip bags which work well) to focus light on a spray can or pop can. The link to the how to video is below.
Then in order to create a small oven I cut a section out of a large pop can. I painted the pop can with high heat flat black paint. I kept the cut out section and painted in black and insulated it with silicon. I glued 4 small pieces of pop can to this lid to prevent it from falling into the can. When placed on the can it formed a nice insulating lid. I also covered both ends of the pop can with additional silicon to provide more insulation. As a test I filled up the pop can with a small amount of water and cooked a hand full of spaghetti. A link to that video is below.
I also baked a small amount of bread in this unit. I used this test to prove to myself that a useful solar cooker can be made almost exclusively out of garbage. I then moved back to my much larger solar unit to further explore all the uses for solar thermal energy.