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Theoretical Study of Flexible Edge Seals for Vacuum Glazing
Abstract:The development of vacuum glazing represents a significant advancement in the area of low heat loss glazing systems with the potential to substantially reduce building heating and cooling loads. Vacuum glazing consists of two or more glass panes hermetically sealed together around the edge with a vacuum gap between the panes. To avoid the glass panes from collapsing and touching each other under the influence of atmospheric pressure an array of support pillars is provided between the glass panes. A high level of thermal insulation is achieved by evacuating the spaces between the glass panes to a very low pressure which greatly reduces conduction and convection within the space; therefore heat transfer through this kind of glazing is significantly lower when compared with conventional insulating glazing. However, vacuum glazing is subject to inherent stresses due to atmospheric pressure and temperature differentials which can lead to fracture of the glass panes and failure of the edge seal. A flexible edge seal has been proposed to minimise the impact of these issues. In this paper, vacuum glazing system with rigid and flexible edge seals is theoretically studied and their advantages and disadvantages are discussed.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1340350Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 570
 A. Zoller, “Hohle Glasscheibe,” German Patent Application. 1913; 387655.
 R. E. Collins, S. J. Robinson, “Evacuated windows,” Solar Energy Vol. 47, No. 1, pp. 27-38, 1991.
 R. E. Collins, T. M. Simko, “Current status of the science and technology of vacuum glazing,” Solar Energy. 1998; 62:189–213.
 J. Wang, P.C. Eames, J.F. Zhao, T. Hyde, Y. Fang, “Stresses in vacuum glazing fabricated at low temperature,” Solar Energy Materials & Solar Cells 91 (2007) 290–303.
 D. K. Benson, C. E. Tracey, J. G. Jorgenson, SPIE symposium on optics and electro optics. San Diego; 1985.
 T. J. Hyde, P. W. Griffiths, P.C. Eames, B. Norton, “Development of a novel low temperature edge seal for evacuated glazing,” Proceedings of the world renewable energy congress VI (WREC2000). 2000; 271–74.
 Y. Fang, T. Hyde, F. Arya, N. Hewitt, P.C. Eames, B. Norton, S. Miller, “Indium alloy-sealed vacuum glazing development and context,” Renewable and Sustainable Energy Reviews. 37 (2014) 480–501.
 E. Bachli, “Heat-Insulating construction and/or lighting element,” International Patent Element Number: PCT/CH 86/00166 (1987).
 K. Bettger and D.H. Stark, “Flexible edge seal for vacuum insulating glazing units,” US patent 20100178439; 2010.
 T. P. Kerr, S. B. Lin, P. P. Harmon, W. R. Siskos, J. L. Oravitz, Jr., P. E. Shaffer, “Vacuum insulating unit,” US5124185 A; 1992.
 D. J. Cooper, “Vacuum IG window unit with metal member in hermetic edge seal,” US7919157 B2; 2011
 T. M. Simko, A. C. Fischer-Cripps, R. E. Collins, “Temperature- induced stresses in vacuum glazing: Modelling and experimental validation,” Solar Energy. 1998; Vol. 63, No. 1, pp. 1–21.
 A. C. Fischer-Cripps, R. E. Collins, G. M. Turner, E. Bezzel, “Stresses and Fracture Probability in Evacuated Glazing,” Building and Enoironmenf. 1995; Vol. 30, No. I, pp. 41-5.