) So now I'm trying to
get the word out so that the invention can be used to capture
the free energy of the sun - for camping and for emergencies,
yes, but also for every day cooking where electricity is not
available and even fuel wood is getting scarce.
II. How it Works
The reflector is shaped like a giant funnel, and lined with
aluminum foil. (Easy to follow instructions will be given soon.)
This funnel is rather like the parabolic cooker, except that
the sunlight is concentrated along a line (not a point) at the
bottom of the funnel. You can put your hand up the bottom of
the funnel and feel the sun's heat, but it will not burn you.
Next, we paint a jar black on the outside, to collect heat,
and place this at the bottom of the funnel. Or one can use
a black pot, with a lid. The black vessel gets hot, fast.
But not quite hot enough to cook with... We need some way to
build up the heat without letting the air cool it. So, I put
a cheap plastic bag around the jar--voila, the solar funnel
cooker was born! The plastic bag, available in grocery stores
as a "poultry bag", replaces the cumbersome and expensive box
and glass lid of the solar box ovens.
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