An interesting way to generate power from radiant
heat, wonder what happens if you use fresnel lenses to
concentrate sunlight, (flat plastic versions from
Edmund Sci. for about $6.00) onto these things, then
store the power in a battery network for use as
required;
http://unisci.com/stories/19991/0210994.htm
No moving parts. No noise. Easy maintenance. Reduced
air pollution. No battery disposal problems. Just a
steady flow of electricity to power navigation and
communications equipment on a sailboat, appliances in
a remote cabin, or electronic equipment for military
ground troops. Wishful thinking? No: A small propane
burner coupled with a radiator and an array of
semiconductor devices is all it takes.
Just as solar converters turn visible light into
electricity, thermophotovoltaic (TPV) devices produce
electric power from infrared radiant heat. Rensselaer
Polytechnic Institute (RPI) is playing a leading role
in developing this new energy source, which is rapidly
moving from theoretical possibility to practical
consumer and industrial products.
TPV technology can have nearly 300 times the power
density of solar devices, said Gutmann, professor of
electrical, computer, and systems engineering. TPV
arrays can generate up to five watts of energy per
square centimeter, compared to 15 milliwatts for a
solar-cell array. A TPV array measuring 30 centimeters
by 30 centimeters could produce more than four
kilowatts of electricity, enough to power major home
appliances, Gutmann said. In addition, TPV systems can
supply heat and operate as needed at night or on
cloudy days.
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