Now you’re cooking!
Harness sun’s energy to efficiently prepare food
Q. I want a solar cooker to help keep my kitchen cooler and save energy. It would also help in case of a power outage or emergency. Can I make one that really works, or should I buy one?
A. It is wise to try to do some of your baking and cooking outdoors in a solar cooker oven during the summer. Baking and cooking use a lot of energy. During the winter, cooking does help heat your home. During the summer, though, cooking results in a double energy cost because your air conditioner must run longer to remove cooking’s extra heat and humidity.
Solar cookers really do work. Many families in the world use solar cookers exclusively. Once you get used to cooking and baking in one, it is almost as easy to use as the oven in a kitchen range. In addition to cutting your utility bills, using a solar cooker will protect the environment for your children by reducing greenhouse gases.
Solar cookers allow you to prepare food when there is a power outage, even if it is not a bright sunny day. Also, these cookers can get hot enough to sterilize foods and drinking water; this can be useful if flooding or some other event pollutes your public drinking-water source. Insert a meat thermometer through the side to make sure the cooker gets to a safe temperature.
You can purchase a good quality, easyto-use solar cooker in the $150 to $300 range. Many of these cookers are designed to collapse for easy storage. This makes them ideal for camping or other outdoor activities when electricity is not readily available. Some inexpensive, superlightweight solar cookers are made of reflective film that you inflate to create the proper shape for solar cooking.
For the most convenience, consider getting a hybrid-style solar cooker. These cookers can bake bread, boil water and roast meats solely using the heat from the sun. The cookers also include backup electric heating elements to use if electricity is available or for very cloudy days. Solar cookers may take more time to cook than a conventional stove; it takes me about 50 percent longer to steam rice in my solar cooker than on my kitchen range.
Most solar cookers include some type of collapsible or folding reflectors to direct more of the sun’s rays onto the cooking pot or baking oven. One powerful model uses a parabolic reflector (similar to a spotlight) to concentrate the sun’s heat. Another uses shiny, flat folding panels. Still another style uses shiny inflatable reflectors to increase heat gain.
If you are energetic and want to involve your children a learning project, you can build a solar cooker/oven yourself. The simplest solar ovens consist of a large cardboard box with a smaller box inside of it. Crumpled-up newspapers can be used for insulation between the two boxes. Place a clear plastic cover over the open top.
For more solar heat, cover three pieces of cardboard with aluminum foil to function as reflectors. One reflector needs to be tilted up steeply from the back to direct more heat into the top. Position the two side reflectors to direct more heat up to the back reflector. Doing this can almost double of the amount of solar heat that’s applied to the food in the cooker.
Another, more substantial, design can be made using plywood and fiberglass insulation. Slant the clear front depending upon your latitude; the front should face the sun more vertically the farther south you live. Use a saw to cut 1-inch-diameter vent holes with adjustable covers in the sides to control the cooking temperature.
The following companies offer solar cookers, kits and plans: Clear Dome Solar (619-990-7977, www.cleardomesolar.com ), Reflections (530-273-9378, www.solarovens.net ), Solar Cookers International (916-455-4499, www.solarcookers.org ),
Sun BD Corp. (315-651-8821, www.sunbdcorp.com and Sun Ovens International (800-408-7919, www.sunoven.com ).
Q. My house has wood-shingle siding. A few of the shingles are rotten and in poor general condition. I would like to add new vinyl siding. Do I have to remove all the old shingles first?
A. You do not have to remove the old wood shingles first. They will form a solid base for the vinyl siding and create an extra layer for additional insulation. Replace the badly deteriorated shingles first.
For increased energy efficiency, add 1/2-inch rigid-foam-board insulation over the old shingles. Use 2-inch galvanized nails to attach the new siding to the wall (be careful not to nail the siding too tightly to the wall).
Send inquiries to James Dulley, Arkansas Democrat-Gazette, 6906 Royalgreen Drive, Cincinnati, OH 45244 or visit www.dulley.com.