Affordable Solar & Wind

Cooking -using an Easy Box Solar Cooker!

I don't remember for sure exactly how this project got started but I was over at Brad and Gina Shaw's house here in Cotahuasi, Peru, where we work as missionaries. Brad was talking about trying to make solar cookers to help the people here. One of our church members was looking for a new burro to replace his mother's burro that had died. She needed the burro to haul firewood for cooking. Because Cotahuasi is a large village and a majority of people still use wood cooking fires, the nearby sources of firewood have been depleted. It takes her a full day every week to go and get a week's worth of firewood. Without a burro, for more details visit to www.chow-chows-secrets.com she would have to go oftener and bring back less wood each time; only what she could carry on her back. Our area usually gets eight to nine months of sunshine a year so solar seems like a good option for a supplemental cooking source. Brad also mentioned the need for more fuel-efficient wood stoves, rather than just a fire on the ground with three stones to support the pot.

Brad had seen a large parabolic solar cooker in Tomepampa, a village about 20 minutes away. He suggested we go look at it so we hopped in the car and went right away. The cooker wasn't at the home where he had previously seen it, but they told us where it currently was and we were able to go and look at it. It was about five feet in diameter, for more details visit to www.cooking-groundbeef.com made of shiny sheet metal attached to a framework of angle iron and a parabolic dish made of one-inch wide metal bars. We were told that it cooked quite rapidly and worked well, so we took measurements and lots of pictures to guide us in making one. However we knew it wouldn't be an immediate solution to the mother's problem because the shiny metal wasn't available here in Cotahuasi.

That evening I did some research on the Web to learn as much as possible about solar cookers and hopefully find some plans for building one. I did see a photo of one that looked very similar to the one we saw, but there were no plans for making it. One of the best sites I found was that of Solar Cookers International, based in Sacramento, CA. Their website is included below; they have many different types of cookers and the plans to make them available as downloadable PDF files. I was anxious to make one right away, rather than waiting until after my next trip to Arequipa where I could hopefully find the materials for the large one we had looked at.

They had smaller parabolic ones, some of them using an umbrella for the parabolic form; others required building your own out of cardboard or wood. The plans that caught my eye were for a box cooker, lined on the inside with aluminum foil and using a piece of glass on top to trap the heat inside of the box. That appeared to be the easiest to build with the limited materials I had available, especially as I could see a large box on a pile of stuff on the other side of the room from where I was sitting at the computer. I excitedly went through the list of materials to see what else was needed. I soon found a big problem; I didn't have any aluminum foil. They didn't recommend using glass mirrors, which I knew I could get in Cotahuasi, and aluminum foil wasn't available. The mission of Solar Cookers International is to promote solar cooking in third world and developing nations, where many people are still dependent on wood fires. The plans had a section on substitute materials that could be used in areas that don't have access to all of the normally used items. Instead of aluminum foil, it said that aluminized polyester film (Mylar®) could be used, although I didn't notice the warning until after I had built the cooker. It said not to use it on the inside of a box cooker because it could melt and give off fumes, but neither of those has been a problem.

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Parabolic Solar Cooker - fries an egg

Food Cooked in a Solar Cooker $39.99 Rebecca Hale Food Cooked in a Solar Cooker - Photographic Print

Parabolic Trough $76.47 High Quality Content by WIKIPEDIA articles A parabolic trough is a type of solar thermal energy collector. It is constructed as a long parabolic mirror (usually coated silver or polished aluminum) with a Dewar tube running its length at the focal point. Sunlight is reflected by the mirror and concentrated on the Dewar tube. The trough is usually aligned on a northsouth axis, and rotated to track the sun as it moves across the sky each day.Alternatively the trough can be aligned on an eastwest axis, this reduces the overall efficiency of the collector, due to cosine loss, but only requires the trough to be aligned with the change in seasons, avoiding the need for tracking motors. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 80 Publication Date: 2010/10/15 Language: English Dimensions: 9.02 x 5.98 x 0.19 inches

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Thames Kosmos 659226 Solar Cooking Science $29.2 Thames amp; Kosmos (Tamp;K) was founded in 2001 with the mission of improving informal science education by publishing highquality science and technology related educational products for children of all ages. Tamp;K places an emphasis on teaching concepts and skills through handson modeling of realworld devices and processes' and by offering comprehensive' meaningful reading materials for a rich learning experience. amp;nbsp;. Construct a parabolic solar cooker with 14 interlocking foil pieces that reflect and focus the sun s radiation on a small cooking container. Heat water or melt chocolate to make an environmentally friendly fondue. Learn about solar thermal energy' a powerful and promising source of renewable energy. Ages 8 and up.

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Solar Furnace $87.62 High Quality Content by WIKIPEDIA articles A solar furnace is a structure used to harness the rays of the sun in order to produce high temperatures, usually for industry. This is achieved using a curved mirror (or an array of mirrors) that acts as a parabolic reflector, concentrating light (Insolation) onto a focal point. The temperature at the focal point may reach 3,500 C (6,330 F), and this heat can be used to generate electricity, melt steel, make hydrogen fuel or nanomaterials. Author: Surhone, Lambert M./ Timpledon, Miriam T./ Marseken, Susan F. Binding Type: Paperback Number of Pages: 128 Publication Date: 2010/05/19 Language: English Dimensions: 5.98 x 9.01 x 0.30 inches

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Parabolic Microphone $70.1 High Quality Content by WIKIPEDIA articles A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a receiver, in much the same way that a parabolic antenna (e.g., satellite dish) does with radio waves. Typical uses of this microphone, which has unusually focused front sensitivity and can pick up sounds from many meters away, include nature recording, field audio for sports broadcasting, eavesdropping, law enforcement, and even espionage. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 96 Publication Date: 2010/09/18 Language: English Dimensions: 6.00 x 9.02 x 0.23 inches

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Hubbard Scientific 4701 Solar Furnace $101.35 Demonstrate the extraordinary power of the sun by concentrating solar energy with this 12amp;quot; diameter parabolic dish. Using its reflective mirror the furnace can generate extreme temperatures to heat materials placed in the attached copper receptacle. Grades 312. American Educational Products have a lead ship time of 21 days.

Parabolic Reflector $70.1 High Quality Content by WIKIPEDIA articles A parabolic reflector (or dish or mirror) is a reflective device used to collect or project energy such as light, sound, or radio waves. Its shape is that of a circular paraboloid, that is, the surface generated by a parabola revolving around its axis. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is transformed into a plane wave propagating as a collimated beam along the axis. Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 100 Publication Date: 2010/09/18 Language: English Dimensions: 6.00 x 9.02 x 0.24 inches

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Parabolic Cylinder Function $79.66 High Quality Content by WIKIPEDIA articles In mathematics, the parabolic cylinder functions are special functions defined as solutions to the differential equationThis equation is found, for example, when the technique of separation of variables is used on differential equations which are expressed in parabolic cylindrical coordinates.The above equation may be brought into two distinct forms (A) and (B) by completing the square and rescaling z, called H. F. Webers equations (Weber 1869): Author: Surhone, Lambert M./ Tennoe, Mariam T./ Henssonow, Susan F. Binding Type: Paperback Number of Pages: 112 Publication Date: 2010/08/15 Language: English Dimensions: 6.00 x 9.02 x 0.27 inches

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