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Posted by Solar Flare on September 11, 2006, 2:59 am
 
Do you think there was much improvement between the BBQ paint and this
special stuff?




Posted by Jeff on September 11, 2006, 7:51 am
 
Solar Flare wrote:

   Good question but remember that these radiant losses are related to
the difference between the absorber temp and the ambient.

   I've done some looking around at absorbance of paints and the non
selective coatings tend to have a bit higher. Solchrome is application
dependant to boot.

Redrock has a good listing here (and I've seen them elsewhere):

<URL: http://www.redrok.com/concept.htm  />

  Note that Ebanol C Black and Paladin Black Lacquer looks attractive
until you try to actually find them!

   You can plug these in to CoDePro:

<URL: http://sel.me.wisc.edu/codepro/new_codepro.html  />

and have some fun, but the air collectors are a different animal than water.

   Jeff


Posted by waynel on September 11, 2006, 11:26 pm
 I have 2 panels up side by side, the one with the solar paint will run
7 deg hotter on a good day in Dec, as the days get longer and sun is
higher they will be closer in temp, but it is always a bit higher with
solar paint. hope this answers your guestion.  wayne
Jeff wrote:


Posted by Solar Flare on September 12, 2006, 2:41 am
 I have 12 panels up and the ones with rust coloured primer (matches
the steel roof tiles)run about 10 deg C hotter than plain galv. iron
sheeting and no isulation at this point. They are behind double wall
polycarbonate greenhouse panels in my barn attic.

The point I was trying to find out was does special paint really make
a difference or is it just hype?



Posted by Jeff on September 12, 2006, 6:31 am
 waynel@ns.sympatico.ca wrote:

How did you prepare the aluminum for the solkote?

   I've emailed them for pricing... It's hard to believ they sell
anything through their website:

<URL: http://www.solec.org/  >, that dates from 1999...

   Jeff

as the days get longer and sun is


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