Solar Arrays. [RE-wrenches]

[Dean T. Newberry]

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Too right Darryl,

Here's a link to a good article on radiant insulation, it discusses the 
issues in detail
http://www.rima.net/handbook/index.htm

cul  deant

Darryl Thayer wrote:

>Sorry but I have looked at black and white paint in a
>Spectral Photometer, and in the infared black and
>white are both black..  Except for a very few paints
>that were created for spectrual charicteristics. And
>most of them did not work very well.  
>
>The white will reflect visible and emit infared, the
>black will absorb visible and emit infared.  The white
>will be cooler because it has less to emit.  
>Daryl
> 
>--- "Carl Emerson, Free Power Ltd."
><freepower at freepower.co.nz> wrote:
>  
>
>>Hullo again...
>>
>>Thanks for the responses to the question on the
>>merits of painting the 
>>panel backs black.
>>
>>As Matt suggested it will have to be tried to prove
>>the theory one way 
>>or the other. The list is split on the issue.
>>
>>I just remember at school more years ago than I care
>>to remember,  a 
>>physics experiment with a tin of hot water.  Two
>>sides were painted 
>>black and two white.  The black sides radiated far
>>more heat.
>>
>>The reason why the issue came up was that I designed
>>a system for a 
>>library here in Auckland and the architect
>>stipulated that the back of 
>>the array was to be black for aesthetic reasons.  It
>>is an open array 
>>with stacks of ventilation. I have pondered on the
>>effect on performance.
>>
>>Is there someone on the list that could easily prove
>>this ??
>>
>>Cheers
>>
>>Carl E.
>>
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>
>
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-- 

 
* Cooperative Community Energy* 	*Dean T. Newberry*

430 D Street, Davis CA, 95616
Tel: 530 758-6064
Fax: 530 758-3684
Email: deant at dcn.org
Web:  CCEnergy.com       
      Talbott Solar <http://www.dcn.davis.ca.us/go/deant/>

Contr. Lic. # B-667908

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