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2 November 1984 Laser Sealed Evacuated Window Glazings
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The design and fabrication of a highly insulating, evacuated window glazing have been investigated. A thermal network model has been used to predict the thermal performance of such a window parametrically. Achievable design options are pdicted to provide a glazing with a thermal conductance less than 0.6 W/m2K (R > 100 re F ft hr/Btu) which is compact, light weight and durable. A CO2 laser has been used to produce a continuous, leak tight, welded glass perimeter seal around 25 cm x 25 cm square test specimens. Various diameters of regularly spaced spherical support spacers were incorporated in the specimens as well as an integral Sn02:F transparent, low emissivity coating for suppression of radiative heat transfer. Laser sealing rates of .06 cm/s were achieved at a 580°C glass working temperature with 400 W of continuous wave (CW) laser power.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. K. Benson, C. E. Tracy, and G. J. Jorgensen "Laser Sealed Evacuated Window Glazings", Proc. SPIE 0502, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion III, (2 November 1984);

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