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Heat transfer coefficients of translucent glazing units for daylighting purposes
Norbert Geuder, Jochen Fricke, Werner Körner, Michael Ehrmanntraut, Andreas Beck

The Bavarian Centre for Applied Energy Research has developed a double-pane glazing unit containing a light-scattering translucent fleece mounted at half distance between two glass panes. The fleece, which consists of synthetic fibres with diameters in the range 1 – 4 μm, suppresses convection between the panes and reduces the infrared radiative heat transfer. The resulting heat transition coefficient, or U value, is as low as for a triple-pane window; the weight, however, is close to that of a double-pane window.

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