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Photovoltaic

Solar energy advantage with noise protective walls

News Umwelttechnikpreis2009 The integration of photovoltaic in existing or planned noise protection walls represents a new challenge. They offer the double uses of noise protection in conjunction with ecologically compatible generation of energy. In order to devise the most technically up-to-date solutions, Kohlhauer here works in close co-operation with experienced partners from the photovoltaic industry and business. Among others, items have been successfully achieved jointly in Freising and in Zürich.

Photovoltaic noise-protective wall Freising-Lerchenfeld

At the southern end of the Clemenssänger industrial district, with a total length of 1200 m and a top performance of 620 Kilowatt, the worldwide largest combined photovoltaic noise-protective wall was constructed.

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On a piled up noise-protection wall of earth material along the Autobahn, a noise-protective wall and a pillar construction have been erected for the around 6000 square meter solar modules. The modules are thereby so aligned with their active surfaces that the solar radiation can be optimally used for the creation of energy and at the same time the noise emissions of the motor vehicle traffic for Lerchenfeld strongly reduced.

The World’s first North-South Bifacial System in Zurich

The sound-reflecting concept of ASEA GmbH (module manufacturer) and Kohlhauer GmbH utilizes sun light on both sides. Variable cell packing density allows for part transparency.

Due to utilization of bifacial modules, this innovative type of system, based on a TNC patent, allows for the use of photovoltaic noise protection, even with north-to-south routes. According to simulation and previously carried out test measurements, the two-way light-sensitive solar cells, viewed on average over one year, achieve an equally high energy yield as a system that is optimally aligned to the south using standard modules.

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The world’s first photovoltaic system, consisting of bifacial modules facing from east to west, was commissioned in December 1997 in Aubrugg near Zurich. The generator was installed as a replacement for an existing wall on a bridge. The photovoltaic noise protection wall, consisting of 50 prototype modules and 10 dummy assemblies, is semi-transparent and has a total length of 120 metres. It is sound absorbing and reflecting. Assembly time was approximately three man-days.

 

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