Posted By ReadyToRetire on 02/01/2008 6:05 PM
Page 15, figure RB15-2, "Air space heat transfer": The graph shows that adding Argon to a double pane window [i]increases[/i] the radiant heat loss by about 5%. Can any of you explain why?
Man, couldn't you have asked an easy question? :-)
I looked for an answer but it seems like every promising Google hit goes to a scientific or engineering document you have to pay to see!! I think it probably has to do with what's called attenuation, i.e., how much the gas filters or scatters the electromagnetic wavelengths that make up thermal radiation as they pass through the medium. I'm surmising thermal radiation travels more easily through argon than through nitrogen and oxygen which is what air is mostly made up of.
Page 19, figure RB19-3, "Comparison of insulating value and solar gain": The table has two lines for Double Pane with LoE2, one shows high solar gair, the other low. Do any of you know what it was intended to show?
It looks to me like there is a typo in the figure. The first LoE2 should be LoE. That makes the graph consistent with the discussion above it.
Interesting booklet. Lot's of good technical info. Just the sort of stuff that tickles my engineering nerd genes!!!
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