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pex vs copper - Page 5

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Posted by Rob Dekker on September 15, 2005, 5:37 am
 


Cool Paul !

They do compromize a bit on the smaller angles (it does not absorb a full 180
degrees).
But since the glazing has a critical angle (under which all light is reflected)
any way,
and the smaller angles have lowest power also, this seems acceptable.

They do manage to extend the absorbtion range from 2R (for a simple round
reflector like I proposed) to about 4R.
And that is a fine accomplishment.

I wonder if they have a patent on this design. I hope not, because is seems a
good solution
for almost all collectors which require fin-free collector tubes.

Thanks for the link !

Rob



Posted by Paul on September 15, 2005, 7:19 pm
 


  You are welcome. I believe the design is patented.
But I would imagine that a clever person with a roll of
aluminum foil could come up with some interesting ideas :)



Posted by Cosmopolite on September 15, 2005, 11:54 pm
 Rob Dekker wrote:

degrees).

reflected) any way,

reflector like I proposed) to about 4R.

good solution

    They claim to have a patent, but I believe the original design comes
from a fluorescent fixture reflector.

Posted by Paul on September 17, 2005, 11:24 pm
 

I think I have found Roland Winston's patent dated Jan 13, 2004.
Patent 6676263
www.uspto.gov



Posted by andre.julien on September 19, 2005, 8:05 pm
 Thanks for all the input. I figure the best will be to build the
collector out of Copper and then transfer the heated water to the
basement via Pex and then into whatever transfer system I decide to
use.

I think when I redo the garage I will put PEX in the cement and then
just run that to a copper collector on the roof or back wall with a
circulating pump in the middle.

For the house I will need to consider other alternative.


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