Thread View: alive.news.technology
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Started by brian white
Wed, 17 Sep 2008 17:29
Appropriate technology research tool and compound parabolic solar cooker
Author: brian white
Date: Wed, 17 Sep 2008 17:29
Date: Wed, 17 Sep 2008 17:29
24 lines
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2277 bytes
Compound parabolic dishes keep the light in one area much longer than parabolic dishes so you do not need to move them often. I have a video explaining how they work at http://www.youtube.com/watch?v=uX9Z-nsUHiA I believe this type of explanation and design of optics could also be useful for other people when they make their solar reflectors. The equipment, laser level and paper etc only costs $20 or so and you can get results really quickly. So it might be useful in poor countries especially for design! Please try it out and give your impressions. That's the only way to spread ideas, in my opinion. You can find info about compound parabolics at http://www.fossilfreedom.com/increase-output.html and at http://www.appropedia.org/Understanding_Solar_Concentrators I did not follow exactly what those people did. You can see how I did the mold at http://www.youtube.com/watch?v=9eY0xh23Anc If you have an hour on your hands, try out some of the curves from the fossil freedom site with the laser experiment. I think it would be very useful to make dishes based on these designs. My solar cooker has been a success even though I thought of the laser test after I had made it. Part of the curve would have been a bit different if I had done the laser first. Thanks Brian White
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