24 September 1986 Transparent Thermal Insulation With Infrared-Absorbing Gases
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We investigate the radiative heat transfer between blackbody-like surfaces confining an infrared-absorbing gas layer. Spectrophotometric measurements on selected gases lead us to optimized compositions with sulfur hexafluoride, propyne, and different freons. Theoretically, the gas is able to diminish the radiative heat flux across a 1 cm thick slab by a factor - 0.7 in comparison with the case of a non-absorbing medium. Infrared-absorbing gases seem to offer interesting possibilities for improved transparent thermal insulation of windows.
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T S Eriksson, C G Granqvist, J Karlsson, "Transparent Thermal Insulation With Infrared-Absorbing Gases", Proc. SPIE 0653, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion V, (24 September 1986); doi: 10.1117/12.938311; https://doi.org/10.1117/12.938311

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