A glass to heat his home

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With the University of Strasbourg, a manufacturer launches a solar glazing to promising qualities.

"We all have a wall in his house in the sun that does nothing to ser! ". This wall, Jean-Marc Robin offers just to use it. Replacing paar insulating glass, coupled with a capture solar system to produce hot water! Nothing to do with traditional opaque sensors attached previously on the roof. The idea is powered for four years in this industry, in partnership with research teams from the National Institute of Applied Sciences (INSA) in Strasbourg. (Formerly ENSAIS)

"The sun does exist for twenty years. The basic technology has finally advanced little in substance. Today, we just happen to capture more energy and lose less ", explains Jean-Marc Robin.

Transparent on 40% of the surface

Transparency and isolation are the keys to innovation that comes into commercialization phase today. It comes in the form of a classic glass, however, carved from a flint glass, before which runs a copper coil fins hidden behind dark. At the rear, silver reflective strips further increase the productivity of the system. In the network circulates a heat transfer fluid by heat exchange, then heats the water to temper the interior of the dwelling.

"The fins, combined with metal strips, allow to obtain 95% absorption of solar energy. "They also act as sunscreens. "At the right of a conventional glazing, sunshine is generally such that we can stick to it. There, the radiation is attenuated. "While maintaining transparency 40% of the area! "In addition, it increases the brightness in local background. "
Conversely, the high quality of insulation chosen for the glazing prevents heat loss to the outside and provides the same protection as a wall.

30% of energy needs covered

For now, the device is installed on the flat Climatherm form INSA Strasbourg where she tested under the authority of Bernard Flament, Doctor of energy. Its development has benefited from aid from ANVAR and the Alsace region. Because the market is promising. In the public sector, but also to individuals. It must be said that the system performance were the stuff of dreams. "In a so-called low-energy house, that is to say that consumes less 6 liters of fuel per year in m2 can be considered a solar glazing 10 2% m30 covers energy needs. "For an installation cost between € 900 1100 to the m2.

Jean-Marc Robin is especially careful about the time required to amortize the cost of the installation, "probably on the order of ten years". With the unknown price evolution curves of non-renewable conventional sources.

A Freiburg research center, one in Stuttgart, validated the project, which relied on the Weather station of Nancy. Known that the region does not shine through the quality of its sunshine!

Yet the solar glazing kept its promises. Moreover, Jean-Marc Robin confides in contact with public collective housing sector, where his invention could find outlets.

from Eastern Republican 07 / 03 / 05

Contact: Jean-Marc Robin, INSA Strasbourg, 24, bld Victory 67084 Strasbourg. E-mail: robinsun@web.de


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