What You Never Knew About Solar Oven Designs
In most 3rd world places, where electricity and other fuel sources are hard to come by, solar oven designs have been used. Not only are they effective in cooking food, but also for water purification in sunny countries like Sudan.
But just because first world countries have enough energy supplies, it does not excuse us from using solar cooking at home and helping to conserve that energy. What’s great about solar cooking is that it uses the power of the sun to cook food - though it may take 4 times longer than a conventional oven.
There have been a variety of unique solar oven designs thought up, but they can be categorized in three shapes: parabolic, panel, and box cookers.
Parabolic Shape:
With the parabolic shape, reflective metal alloy is put into a bowl-like shape, where the sunlight is then focused on a single point. The advantage of this type of design is that it efficiently uses the sun’s energy to cook food in the shortest time possible. The only drawback is that it is usually a fixed structure that is hard to transport, and it is the most expensive of the three.
Panel Cooker:
This shape usually is in a bowl-like shape, and direct the sun’s energy to one area. But it differs to a parabolic cooker in that it is put together with a number of reflective, flat panels and is less rounded.
The panel shape is not as efficient as the parabolic shape, but it has the advantage of being foldaway, portable, and rather simple to make. These cookers can be found in a number of interesting deigns, but the simplest is by far the one made by folding one of those reflective windscreen blinds.
Box Shape:
Very different to the other two designs, the box cooker works by trapping the sun’s heat, instead of simply focusing it on a central point. It is designed in such a way that it let’s light in, but stops that heat from escaping. As more sunlight comes in, the hotter it gets.
What makes the box cooker appealing is that is really easy to make - the simplest design requires a cardboard box, a piece of clear glass or plastic, and tin foil - and it can cook a large portion of food at a time.
What I like most about solar oven designs is that they can be put together with simple materials found at home in the course of an afternoon. It’s a fun project to do with your kids, and the shapes you come up with are really limited to your imagination. And do not just think your solar cooker is only good for boiling water or steaming vegetables. People have successfully roasted meat in them and even baked bread. Another pro is that your solar cooker will be outside when used, so it will not cause your whole kitchen to heat up and put strain on your indoor cooling system - another way it helps you to conserve energy.
And if you think that over 75% of American households use their oven or stove on a daily basis - a tremendous amount of energy could be conserved if more of us used solar oven designs during summer.
So why not solar cooking out for yourself. You really have nothing to lose. If you are not willing to spend money on a professionally made design, why not build one at home with the kids - the internet provides a whole host of free blueprints and instructions, so try it out and have fun saving power.