Marzahn/Hohenschönhausen, Germany. A wind turbine has been running in test operation since late summer last year in the Marzahn industrial Park at Nordring 13, right next to the BSR Recycling Facility. Not two-and-a-half kilometers away as the crow flies, in the Hohenschönhausen commercial area Marzahner Strasse / Plauener Strasse, there soon could be a second wind turbine. LiMa+ submitted a question to the head of the Urban Development Office Lichtenberg, Klaus Güttler-Lindemann. He confirmed that there was a request from enbreeze GmbH, which is based in the commercial area, to set up a wind turbine on the premises of Marzahner Strasse 36. “However, we have not yet received an application,” says Güttler-Lindemann. The district office informed the Committee for Ecological Urban Development regarding the project at its meeting on October 1. “Just one wind turbine is planned, not a wind farm in the city," the head official assured. TECHNOLOGY CAN ALSO BE BEAUTIFUL The wind turbine declared as a research project is certainly also a reference object and flagship for the company, which develops and manufactures small wind turbines. In Marzahn you can admire the pilot specimen from the road. It is immediately apparent that it looks snazzier than conventional wind turbines. The blades and the hub are designed in color, and the wind turbine is smaller than usual. The technical director of enbreeze GmbH, Jan Dabrowski, has the exact numbers: The hub height is only 22 meters and the rotor diameter just 11.5 meters. (Conventional wind turbines have heights of 140 to 180 meters and rotor diameters of 80 to 150 meters.) QUIET WITH A HIGH DEGREE OF EFFICIENCY “The field trial of the test wind turbine is promising,” said Jan Dabrowski, who helped develop the prototype. “We built the profile control of the rotor blade specifically for low and strongly fluctuating wind speeds near the ground,” he said. In addition to an appealing, almost filigree design, in this way it was also possible to lower the noise emissions to under 45 decibels. This corresponds approximately to the volume in a residential area with no traffic. In this way the wind turbine in lightweight design can also be used in urban mixed-use areas where residential and commercial coexist as neighbors. Another special feature is the hydraulic tilting device, with which the tower can be easily tilted down for maintenance purposes. In addition, there is a more aerodynamic peak efficiency of 52 percent. “The generator provides up to 30,000 kilowatt hours per year, an amount of energy sufficient to cover the needs of six to eight households,” says the engineer, not without a bit of pride. There are already many inquiries from prospective customers of small wind turbines. PROJECT FITS WELL WITH CLIMATE PROTECTION The young clean-tech company moved from Cologne to Berlin in April 2014 and quickly found a strategic partner in the neighborhood in the Lichtenberg company Elpro GmbH, which has a long tradition. Since then, eight employees have been working meticulously in Hohenschönhausen on the energy of the present and near future: The small wind turbines are to make a cheap, decentralized energy supply possible. One that is clean! With Berlin’s first climate protection concept adopted by the District Assembly in 2010, Lichtenberg has set itself the goal of reducing carbon dioxide emissions significantly by 2020. As the Climate Protection Officer of the district Kirsten Schindler said, concrete actions are to be presented in early November. “I think the planned construction of a wind turbine in our district is good, because it makes a contribution to clean energy,” said Schindler. Wind energy now meets more than 6% of electricity demand in Germany. That makes it the most important renewable energy source.
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