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most efficient collector for solar water heating - Page 2

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Posted by codechump on December 23, 2008, 11:51 pm

200C (not F)... that's awesome. I'm thinking the costs are going to be
much lower overall too. I tried the link to the JPG picture, but it
did not work. Can you try again?

Posted by andrew on December 24, 2008, 12:26 am
codechump@gmail.com wrote:



Posted by codechump on December 24, 2008, 2:04 am
thanks... one quick question: Why the blue?... have you not peeled the
coating off the plexiglass yet?

Posted by azuredu on December 24, 2008, 6:28 am
 On Dec 24, 3:04 am, codech...@gmail.com wrote:

Reflection of the sky by the cover.

Posted by azuredu on December 24, 2008, 6:55 am
 On Dec 24, 12:51 am, codech...@gmail.com wrote:

If you are looking for temperature limit, 200C is nothing. I have
reached 320C in an earlier model with much lower performance, making a
big hole in the cover. If I let go this one, it should make 450C if it
does not melt down before.

And when the evacuated receiver is ready, 800C is the virtual limit.
Virtual because the receiver will implode well before that.

This is because this small DIY model is beating all the current
industrial products in terms of performance, huge or small.

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