- a home
- A thermosiphon air panel or TAP. Those of my readers who remember how a passive thermosiphon solar water heater works already know most of what they need to know here. A TAP is a wide, flat box with glass on the front, insulation on the sides and back, and a sheet of metal running parallel to the glass, with a couple of inches of air space between metal and glass. Air comes in at the bottom, flows over the metal, and goes out the top into the space that needs to be heated. Position the panel in the sun, and the metal very quickly gets hot; the air passing over the panel picks up the heat, and you very quickly have cold air being sucked into the pipe that leads to the bottom, and hot air being blown out the pipe that leads out of the top.
- Solar Water Heater
- There are three basic types of solar water heater: batch (simplest/cheapest, but you need to use the water during the late afternoon), passive thermosiphon (provides hot-water anytime, where it doesn't freeze in the winter), and closed-loop active (needed where it freezes)... Readers interested in building batch systems should find a copy of DanielKReif’s classic PassiveSolar Water Heaters; which provides plenty of information and detailed plans for two systems. DavidABainbridge’s The Integral Passive Solar Water Heater Book is a good sourcebook for the range of batch designs in use or under development in the late 1970s and early 1980s. Passive thermosiphon and closed loop active systems are beyond the reach of all but a very few home workshops; if you want to go this route and have the funds, your best bet is to talk to a professional. There are solar energy companies in every region of the United States and a good many countries abroad that can set you up with a system suited to your location.
- Solar Cooking
see Direct Use of the Sun's Energy by FarringtonDaniels ISBN:0300094760