Community Research and Development Information Service - CORDIS


In contrast to the conventional permanently mounted systems for saving the energy lost through windows, the multiple fabric roller blind allows the energy flow through a window to be regulated according to the prevailing radiation and temperature conditions. By using different, selectively coated fabrics, light is transmitted through the window while the IR component is reflected. Further significant advantages in comparison to exterior venetian blinds are the protection of the fabric blind system from the weather and its good accessibility from inside for possible repairs. In the course of the demonstration project all single glazed windows in a school building were equipped with fabric blinds of the roll-up type and each single glazed window on one floor of an eight storey office block was fitted out with a second glass pane which could be opened from inside the building. Fabric blinds for sun-shielding and thermal insulation were mounted in the space between the two glass panes. With the thermally insulating fabric blind installed within a double glazed window or mounted as a roll-up blind on the inner side of single glazing, the U-value of 5.2 W/m2/K for single glazing is reduced to 1 W/m2/K when the blind is drawn. When the heating is adapted to take advantage of the solar input, an energy saving of 75% in comparison to single glazing with exterior venetian blinds can be achieved.

Additional information

Authors: QUACK F, Fraunhofer Institut für solare Energiesysteme, Freiburg (DE);BOPP G, Fraunhofer Institut für solare Energiesysteme, Freiburg (DE)
Bibliographic Reference: EUR 12752 DE/EN (1990) 119 pp., FS, ECU 11.25
Availability: (2)
ISBN: ISBN 92-826-1427-1
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top