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Tech Head - The Technology Section
Einstein's Alcove
solar panels (domestic)
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<blockquote data-quote="spiney" data-source="post: 265916" data-attributes="member: 192438"><p>Paint as black as possible, physics: "black body radiation/absorbtion".</p><p></p><p><a href="http://www.egglescliffe.org.uk/physics/astronomy/blackbody/bbody.html" target="_blank">http://www.egglescliffe.org.uk/physics/astronomy/blackbody/bbody.html</a> .</p><p></p><p>Other thing is, then cover with glass (energy then cannot be re-radiated, it's actually the famous "greenhouse effect"!).</p><p></p><p>The trick is, paint as black as possible, to absorb as much as possible of the solar radiation (as visible light). However, when re-radiated back out in thermal equilibrium (as infra red), the longer wavelength radiation then can't go back the other way (through glass), hence the radiator temperature rises, and you can pump away the heat!</p></blockquote><p></p>
[QUOTE="spiney, post: 265916, member: 192438"] Paint as black as possible, physics: "black body radiation/absorbtion". [URL]http://www.egglescliffe.org.uk/physics/astronomy/blackbody/bbody.html[/URL] . Other thing is, then cover with glass (energy then cannot be re-radiated, it's actually the famous "greenhouse effect"!). The trick is, paint as black as possible, to absorb as much as possible of the solar radiation (as visible light). However, when re-radiated back out in thermal equilibrium (as infra red), the longer wavelength radiation then can't go back the other way (through glass), hence the radiator temperature rises, and you can pump away the heat! [/QUOTE]
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Einstein's Alcove
solar panels (domestic)
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