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Ok Solar Box Oven!
A great solar oven you can build quickly from two cardboard boxes

This is a great solar oven design that can be built quickly from two cardboard boxes.

  Experiments in different Countries have proven that solar box ovens can be built more simply than even the simple method we have been using. These discoveries have paved the way for a simpler construction method that allows a cooker to be built in a few hours for hardley any money.

Here are a few reasons why this design is possible:

  • Foiled airspace takes the place of insulation in the walls.
  • You only need one layer of aluminum foil, but a layer on the inside of each box makes a hotter oven.
  • Only a small amount of space is needed between the walls of the inner and outter box.
  • Almost any size oven will work.
  • A double layer of plastic film (such as Reynolds Oven Cooking Bags®) works as well as a single sheet of glass. It may not last as long, but the plastic wrapping is cheaper, lighter, and easier to obtain.
  • Shallower ovens cook better because they have less wall area through which to lose heat. It's best for the inside of the oven to be just slightly taller than the biggest pot you plan to use.

A New Simpler Design

Taking this information into account, we are able to take our best shot at describing the minimum solar box cooker.

Materials

  • Two cardboard boxes, with an inner box that is at least 15" x 15" (38cm x 38cm), but bigger is better. The outer box should be larger all around, but it doesn't matter how much bigger, as long as there is a half inch (1.5cm) or more of an airspace between the two boxes. Also note that the distance between the two boxes does not have to be equal all the way around. Keep in mind that it is very easy to adjust the size of a cardboard box by cutting and gluing it.
  • One sheet of cardboard to make the lid, which must be approximately 2" - 3" (4 - 8cm) larger all the way around than the top of the finished cooker.
  • One small roll of aluminum foil.
  • One can of non-toxic when dry flat-black spray paint or one small jar of black tempera paint. I would recommend the tempera paint.
  • At least 8 ounces of white glue.
  • One Reynolds Oven Cooking Bag®. They are rated for 400° F (204.4° C), which makes them perfect for solar cooking. They are not UV-resistant; thus they will become more brittle and opaque over time and may need to be replaced periodically. A sheet of glass can also be used, but this is more expensive and fragile, and doesn't offer that much better cooking except on windy days.

Building the Base

Fold the top flaps closed on the outer box and set the inner box on top and trace a line around it onto the top of the outer box, Remove the inner box and cut along this line to form a hole in the top of the outer box (Figure 1).

Decide how deep you want your oven to be (about 1" or 2.5cm bigger than your largest pot and at least 1" shorter than the outer box) and slit the corners of the inner box with a knife down to that height. Fold each side down forming extended flaps (Figure 2). Folding is smoother if you first draw a firm line from the end of one cut to the other where the folds are to go.

Glue aluminum foil to the inside of both boxes and also to the inside of the remaining top flaps of the outer box. Don't waste your time being neat on the outer box, since it will never be seen, nor will it experience any wear. The inner box will be visible even after assembly, so if it matters to you, you might want to take more time here. Glue the top flaps closed on the outer box.

Place some wads of crumpled newspaper into the outer box so that when you set the inner box down inside the hole in the outer box, the flaps on the inner box just touch the top of the outer box (Figure 3). Glue these flaps onto the top of the outer box. Trim the excess flap length to be even with the perimeter of the outer box.

Finally, to make the drip pan, cut a piece of cardboard, the same size as the bottom of the interior of the oven and apply foil to one side. Paint this foiled side black and allow it to dry. Put this in the oven (black side up) and place your pots on it when cooking. The base is now finished.

 

Building the Removable Lid

Take the large sheet of cardboard and lay it on top of the base. Trace its outline and then cut and fold down the edges to form a lip of about 3" (7.5cm). Fold the corner flaps around and glue to the side lid flaps. (Figure 4). Orient the corrugations so that they go from left to right as you face the oven so that later the prop may be inserted into the corrugations (Figure 6). One trick you can use to make the lid fit well is to lay the pencil or pen against the side of the box when marking (Figure 5). Don't glue this lid to the box; you'll need to remove it to move pots in and out of the oven.

 

 

To make the reflector flap, draw a line on the lid, forming a rectangle the same size as the oven opening. Cut around three sides and fold the resulting flap up forming the reflector (Figure 6). Foil this flap on the inside.

To make a prop bend a 12" (30cm) piece of hanger wire as indicated in Figure 6. This can then be inserted into the corrugations as shown.

Next, turn the lid upside-down and glue the oven bag (or other glazing material) in place. We have had great success using the turkey size oven bag (19" x 23 1/2", 47.5cm x 58.5cm) applied as is, i.e., without opening it up. This makes a double layer of plastic. The two layers tend to separate from each other to form an airspace as the oven cooks. When using this method, it is important to also glue the bag closed on its open end. This stops water vapor from entering the bag and condensing. Alternately you can cut any size oven bag open to form a flat sheet large enough to cover the oven opening. 

 Improving Efficiency

This oven should cook fine during most of the solar season. If you want to improve the efficiency to be able to cook on more marginal (less sunlight) days, you can modify your oven in any or all of the following ways:

  • Make pieces of foiled cardboard the same size as the oven sides and place these in the wall spaces.
  • Make a new reflector the size of the entire lid (see photo).
  • Make the drip pan using sheet metal, such as aluminum flashing. Paint this black and elevate this off the bottom of the oven slightly with small cardboard strips.
  • this text and pricture are contribution fo www.wek

Please write to us your ideas and recites

 

About Veggie Life — With more than 100 full-color pages of tiSolar Energy Galery of Pictures and Information on Solar as well as other solar related items.solar, sun, panels, inverters, batteries, battery, photovoltic, Siemens, BP Solar, Kyorcera, Solarex, Solec, Unisolar, power, electricity, home, light, safe, free, cables, batteries, battery, power supply, Shelters, go, help, sun oven, solar oven, oven, water, pumps, purification, wind, turbines, fuel, combustion, emissions, energy, sun, earth-friendly, non-toxic, ecology, ecological, solar-poweredps, techniques, and delicious recipes, Veggie Life is the only healthy lifestyle magazine that covers natural living from the ground up. It includes information about organic gardening, nutrition, cooking, herbs, fitness, and more. Feature articles show how to grow organic vegetables, herbs, and flowers; cook low-fat, healthy cuisine; and feel positive and energized through exercise, nutrition, and diet.

 

 

 

We provide OEM energy solutions for military and government, as well as private sector applications, helping clients achieve 100% up-time for applications ranging from Hospitals, school warning signals to explosion proof street lights.Applications:

Commercial - Industrial - Disaster Relief - Military and Residential

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Fuel Cell Are you tired of your devices being left in the dark, when your solar energy system stops providing power? Then IQ Fuel Cells are the perfect answer for you. Are now available as an alternative source for renewable energy. Unlike traditional power generators, they don't require gasoline to generate power. They also provide an alternative to solar generators because they do not depend on any external power gathering equipment. These units are compact, durable, and built to power a wide range of applications. The Best Generator Ever! Applications: Airports, Computer Rooms, Hospitals, Traffic, UPS Smart designs with IQ Fuel Cells for smart energy applications Contact us today!

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IQAirport Airport and Heliport landing back-up Battery Charger: 12Volts, 24 Volts, 36Volts, 48 Volts -120VAC or 230VAC Using state-of-the-art, switch-mode technology, the DLS Power Supply series is engineered with the user and variable environmental conditions in mind. Extra care has been given to insure many years of service-free operation, even when subjected to extremely harsh conditions. Batteries are charged quickly and efficiently without over charging and pumps, motors, and fans operate perfectly for prolonged life.

OkSolar.com has decided to adopt QR-Codes in our manufacturing process to streamline support and maintenance in all of our applications, resulting in savings for Government Agencies.

 


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Buoy-Based Security System For Ports - How to Secure Ports - Obstruction Lighting - Marine Lanterns - Infrared LED Red Beacon.
OkSolar Projects Commercial Industrial and Military - Hospital Solar Power Solutions.
Electric Vehicle Charging Station Solar Powered - How To Create a System to Solar Power Electric Cars.
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How to Install a Obstruction Lighting in a Wind Turbine - Wind Turbine Lighting.
How to Install a Solar Powered Obstruction Lighting in a Wind Turbine - Solar Powered Wind turbine Obstruction Lighitng FAA Certified.
How to Secure Ports - Obstruction Lighting - Marine Lanterns - Infrared LED Red Beacon
How to use a BBS Battery Backup system for Obstruction Lights Obstruction Lighting.
Modular Energy Storage Solar Powered, Wind and Fuel Cells Assisted Substantially reduces the requirement for diesel fuel and the associated costs and logistics and attacks..
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About Veggie Life — With more than 100 full-color pages of tips, techniques, and delicious recipes, Veggie Life is the only healthy lifestyle magazine that covers natural living from the ground up. It includes information about organic gardening, nutrition, cooking, herbs, fitness, and more. Feature articles show how to grow organic vegetables, herbs, and flowers; cook low-fat, healthy cuisine; and feel positive and energized through exercise, nutrition, and diet.

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