Introduction: Solar Cooking With a Cardboard Oven 2.0!

Recently, I became interested in solar cooking for several reasons.  It is a fascinating subject, and to satisfy my curiosity, I decided to make a solar oven (or two).  This picture series, and video shows my efforts in constructing and using a "mini-solar oven".  I had made a larger oven (see: https://www.instructables.com/id/E7Z11MCH3QFJE60/ ) and was amazed with the results and came up with the idea of making a scaled down version, or a "pocket solar oven" if you will. The first photo is of the completed oven, cooking an egg.  Temperature at this time was 250 degrees, and that is hot enough to cook many different foods, but I chose the egg to demonstrate.

Pictures have instructions, but basically what you need to do is cut pieces as shown, size of oven is variable, of course, but this scale model has a cooking chamber of 4x4x4inches.  A box of 6x6x6 is the outer shell, and the space in between is filled with insulating material, i.e., cardboard, newspaper, or other insulating materials.

I ended up with square reflectors, with the mirrors (4 inch mirror tiles) glued on with spray adhesive. The reflectors are held in place by a piece of light cardboard glued onto the backs, and then this piece is inserted down into spaces between sheets of insulating cardboard.

The reflectors are a very passive system, and need only be adjusted a very little. In order to do that, I added the wood pieces as shown, held in place with a heavy rubber band.  When adjusting mirrors, you learn how to look at the shadows of the boxes, and the actual reflected sunlight into the cooking chamber.  Trial and error stuff. 

Learning the timing comes with just a little practice, and I found that an hour and a half was sufficient to cook the egg to a soft boiled egg state. 

I consider the experiment a success, and this stove could be used as a one person meal preparation unit that is easily transportable, even back packed, and is environmentally sound, a true "green" project. 

To watch video, use this link: 

Comments

author
triumphman (author)2012-07-07

Doesn't that black foam type of insulation get very hot and give off an odor of melting plastic ? I have used it before on projects and it breaks down with heat! Is there a better way to go? I don't like the smell it gives off!

author
inutec2012 (author)2012-06-25

Pretty brilliant idea! As a Photovoltaic Expert I really appreciate this kind of stuffs.. Keep it up.! Let's all go Solar now....

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Bio: Retired, doing art work now. Great. Have the time and the money to spend doing what I want to do.
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