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compound parabolic solar cooker good for up to 3 hours without moving it.

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Posted by brian white on September 12, 2008, 12:27 am
 
I made a solar reflector on a mold that is compound parabolic in shape.
This means that it points the light at an area (the cooking vessel) for a
known length of time.
It has been working really well so i thought I would share the info.
First 2 videos at http://www.youtube.com/user/gaiatechnician  how to make
the dish and the optics explained.
The optics experiment is one you might like to repeat if you design your
own dishes.
Brian

Posted by AstickfortheMULE on September 12, 2008, 3:21 pm
 
Brian.

Thank you so much.  That is BRILLIANT.

So simple, so easy and so cheap and so effective.

Every once in a while someone comes up with an amazing idea that could
possible change the world.

My son needs a science experiment and we will make this.  Are you
pleased with the performace?

Eric

Posted by brian white on September 13, 2008, 3:05 am
 On Fri, 12 Sep 2008 08:21:32 -0700, AstickfortheMULE wrote:


Last time it didn't go so I re post.
I am happy with it. I steam soil in a 7 litre pot with it. Pot 1.15kg, pot
+soil 9.2kg and pot+soil+water 10.75 kg. (Water is added so it doesn't
burn). I put an oven bag over it and it goes to just over 90C
in the 3 hr. I do not know exactly but that gives an idea.
I have results to put into graph form soon.
It can boil water but maybe not 7 litres. It went to over 90C in a 7
litre water heating test but there were clouds so i do not know how high
it can get. It did boil 1 litre of water but that was in the bottom of
the big pot.
Hardly an efficient way to do it with much of the heat on the sides of
the pot too. I will do more tests maybe with smaller pots.


Posted by ohara5.0 on September 13, 2008, 5:57 am
 
Another impressive video.  Very cool.

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