RWE has decided on an innovative repowering project for a wind turbine in Emsland which sets an example in the field of sustainability. The 1.8 megawatt turbine, which had been operating at the Lengerich wind farm since 2003, is being replaced by a modern 5.7 megawatt turbine. This will allow the significantly more powerful wind turbine to supply around 4,000 homes with climate-neutral electricity in the future. So far, the existing turbine produces enough green electricity to meet the needs of 1,000 homes.
But the new factory will have a positive impact on the environment for another reason. For the first time, RWE will use a prefabricated foundation for the construction of the new plant. The foundation developed by Smart & Green Anker Foundations is made up of 100% precast elements produced in the concrete plant. Only a third of the amount of steel and concrete normally used for standard poured foundations is used. Since all parts can be produced in a concrete batching plant in advance, construction time is also significantly reduced, as construction can take place in almost any weather. Assembly is also less complicated, less expensive and more environmentally friendly: instead of using 120 concrete mixers, the parts are delivered by about 30 truck trips and then bolted together on site. They can be easily disassembled again in the event of subsequent deconstruction.
The certification process for the innovative foundation is currently underway. This will be used to apply for a modification permit for the wind turbine that has already been approved. The dismantling of the old wind turbine is scheduled for the spring of next year. The construction of the new turbine, whose commissioning is scheduled for the fourth quarter of 2023, will also begin on this date. The height of the hub is 118 meters and the foundation will weigh around 800 tons.