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Liquid crystal techniques and daylight systems (LCDAYLIGHT)


Replacing artificial light by solar light allows energy savings and furthermore in winter the outdoor thermal transmittance can be reduced, whereas in summer, light and solar energy can be lowered and one can therefore minimize the energy required for cooling. Numerous works and studies have been made on glazings and glazed components to attempt to reduce energy consumption (low emissivity glazing...). The current glazed components (windows, openings...) available on the market do not fit the performances wanted in the sectors like lighting, anti-glare protection, and thermal flux management. Devising an adaptive component capable of manually or automatically working and of being produced with an acceptable cost to meet the market is the challenge we have accepted. Its development goes in the direction of the recommendations from the Kyoto protocol requiring a reduction of green house gas emissions. The switchable lamella component developed by Polymage is a key point of the device. It allows increasing the energy performances of fenestration systems and a more efficient use of solar gains from the glazed building parts or other openings. With that new type of component, Polymage expects to open onto new markets like "the Venetian" market and more generally that of solar control in buildings and the like.
State-of-the-art as to the use of daylight in buildings are combinations of several systems where each system is optimised only for one certain task; thus contradictory functions concerning the illumination, redirection, sun shielding and glare protection, contact to the outside and utilisation of solar thermal energy in/with the same one product are not possible. The expected benefit/result of the research and development project LCDAYLIGHT is an innovative mulitifunctional daylight system which is able to control simultaneously light and climate, i.e. transmission, reflection and scattering of daylight and sunlight. This way energy costs of buildings for lighting and heating in winter/cooling in summer can be saved. The intended system also represents an active contribution to the environmental protection by replacing considerable amounts of fossil energies by solar energy. With the new system Glastec expects to open up new markets at least on the European level, securing the survivability in the aggressive/severe competition in the insulating glass industry and assuring a dominant position in the field of novel daylight systems. So the results of LCDAYLIGHT, the development of the system described above is of vital interest respective at the center of interest of Glastec and directly addresses its core business.