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DIY Ecavuated Tubes - Page 2

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Posted by GEOD998 on December 21, 2008, 12:30 pm
On Dec 17, 7:15am, n...@dont-mail-me.com (Robert Scott) wrote:

just an off the top of my head suggestion/question .Why couldnt one
fill the space with CO2 or someother "greenhouse gas" while it may not
offer max. insulation,should it not increase insolation? making the
inner tube get warmer because of the lensing effect of a greenhouse
gas? .Would there be any insulating quality with these gasses because
of the heat trapping effect they have? not by R value but possibly E
value. i've been wondering about useing CO2 or even methane[kaboom] in
other projects.Hell even bill nye the science guy does experiments
showing higher temp increases when shining light thru methane
vs.normal atmo.,lol. any advantage to be had??

Posted by Father Haskell on December 29, 2008, 8:44 pm

I've done that to boost the output of fluorescent grow lamps by
running foil duct tape along one side of each tube.  Not sure
how well the tape would hold up inside a hot solar panel.

Evacuated tubes I've seen were sealed with a torch.  If
you're set on gluing the ends, RTV silicone will seal
best and last longest.

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