The Brigham Young guys who invented it claim 45 to 60 degrees is
ideal. I think it depends on how often you're willing to turn it. But
they showed no working, so for all I know it was a guess - it'll be
great to actually *know* :-)
On Thu, Oct 8, 2009 at 4:38 AM, ... <offonoff...@gmail.com
> Right now I am away from an internet connection for my computer, which
> has the graphs and other communicative things. Perhaps I'll wrestle
> some files onto this computer sometime soon, but otherwise it'll be a
> couple weeks. But the light funnle does indeed have interesting
> properties. I am no longer skeptical about the usefulness of a well
> designed light funnel in solar tThe Bhermal processes.
> My friend, who has built one, has done some research and claims that
> the ideal angle of the funnel is 60 degrees. Vinay has been in the
> scene for a while. Is this the common thinking about funnels, that 60
> degrees is ideal?
> If it is, then raytracing and good old algebra have some suggestions.
> When I post some more detailed analysis I'll have a design to propose
> based on my results.
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