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29 Mar

Federal Government

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The annual yield increases of 80 to 470 million Kilowatt hours! While in Denmark that covers its power consumption to 20 per cent from wind energy is already running, the second large-scale repowering program repowering in Germany plays virtually no role. Restrictive regulations obstacles for the repowering of old wind turbines are the strict height and spacing recommendations in particular the coastal States. Examples: Lower Saxony: 1,000 meters away from the nearest residential buildings must comply with a new wind turbine; in 1995, usually 400-500 metres were needed. Schleswig-Holstein: 100 feet total height at least 5 times plant height of the next village, the 3.5 times of the next House Mecklenburg-Western Pomerania: minimum 800 metres to the next House and 1,000 metres to the nearest settlement. Height limits are dependent on the communities, but usually at 100 meters.

Potential killers the height limit prevents the construction of large-scale systems of multi-MW class and reduces the performance of a machine. Only prevail in the height the wind conditions, which needs a large investment to get on tour. The impact of altitude and distance limits are enormous, as a study of the TU Berlin revealed. In an investigated wind park in Schleswig-Holstein, repowering would increase the existing power to the 4.3-fold although instead of such as so far 13 of only six large wind turbines would be used. Distance and height limits don’t but an increase in efficiency. (Similarly see: General Electric). After compliance with all rules, you can increase the performance only by a factor of 1.7.

Tripling possible according to the statistics of the German wind energy Institute (DEWI) 30 billion can be produced in the average wind year kWh. With an optimized repowering could be on the same surface as the triple current yield 90 billion kWh or produce over 15 percent of electricity consumption in Germany. However, at most, an increase by 50 percent to 45 billion kWh could be achieved taking into account the rules of spacing and height limits. By An energy potential is so away distances and height limits of at least 45 billion kWh. Federal Government blameless the Federal Government in the German repowering disaster not fault. The effective January 1 amendment of the renewable energies Act (EEG) expressly provides a repowering-bonus of 0.5 ct / kWh. Black Peter is clearly the ministries of countries which prevent their distance and height recommendations – where the local authorities Orient – an efficient repowering. But even if here, the recommendations would be relaxed, remain still the resistance of civil associations. Here, the argument of the reduced number of system attacks hopefully. Sometimes less really is more. Markus Kreusch

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