Hybrid Tower Bögl
Wind power towers are the supporting pillars of every wind turbine. Great forces act on them when generating wind power - a challenge for statics, materials and engineers. The height of the wind turbine plays a particularly important role in achieving the yield, especially for the new generations of turbines with large rotor diameters.
These in turn place new height requirements on the components. High tower systems in particular can improve and efficiently exploit the wind potential of low-wind locations. On the one hand, the annual yield of a wind turbine increases by 0.5 to 1 % per meter depending on the location, and on the other hand, new locations can be developed, such as in mountainous terrain, which could not previously be considered. By reaching certain heights, the turbine can be lifted into linear wind zones and thus operated efficiently.
A concrete-steel combination of the tower is ideal for great heights, as pure tubular steel towers would no longer be economical in this size range. Our hybrid towers are ideal for hub heights of 140 m and above. The lower part of the towers consists of concrete elements, while the upper part consists of steel tube segments and can reach a Hub height of up to 199 m according to the current state of development.
For the formulation of the self-compacting concrete used, we rely on limestone and granulated blast furnace slag from our own production. Thanks to this mixture, up to 70 % of the cement can already be substituted. Our own research and development department is working on further increasing the savings potential in the future. In addition to cost savings, the incentive behind this is also to reduce CO2 emissions in cement production and thus make an even more active contribution to climate protection.
In order to meet the increasing demand resulting from the German government's ambitious expansion targets for onshore wind turbines, up to 600 hybrid towers per year are now produced at three production sites in Germany. In this way, we are making a significant contribution to providing the necessary capacity for the rapid expansion of Renewables.
