What Are Focusing Solar Collectors

Magnifying Glass Heater

As we all know, much of our English language has evolved from the ancient Greek, and many English words have Greek parts. So any word that has the prefix helio- probably has something to do with the sun. A helioelectrical process is a way of converting sunlight to electricity something we're just learning to do efficiently. Photosynthesis, mentioned in the last chapter, is an example of a Focusing collectors or solar concentrators as they're sometimes called...

How Can You Build Your Own Absorber Plate

Season Solar Water Heater

Some ambitious and highly-skilled types will surely choose to build their own absorbers. Several good plans have been published lately, and even though they require a lot of picky labor, the final products work pretty well. One detailed set of instructions is put out by the Brace Research Institute near Montreal, the world-renowned center for studying intermediate technology. Their plans call for a sheet of galvanized corrugated steel roofing riveted to a flat sheet that is slightly larger. The...

How Much Hot Water Do We

Coil Heat Exchanger Schematic

Americans use and waste appalling amounts of hot water. People in other parts of the world just can't believe us. Motel owners in E urope complain bitterly about how tourists from the United States increase their fuel bills and overload their septic systems. We're spoiled. We squander water just the way we've squandered many of our other resources. John Murphy, in the Homeowner's Energy Guide, says that we use up hot water in approximately this way Every time we take a shower we use about 10...