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Windtech International January February 2024 issue





A Foundation Concept for Offshore Wind Farms

ImageSteel monopile foundations dominate in today’s offshore wind business. ENERGI E2 has a long track record in offshore wind and has worked with concrete gravity foundations as well as steel monopiles. The costs of the main structure of steel monopiles are more than twice as high as those of concrete gravity foundations. Installation of the two types of foundation is likely to be in the same cost range – which would mean that the total cost of concrete gravity foundations should be lower than that of monopile foundations. The very low cost of the concrete foundations for Nysted Offshore Wind Farm illustrate this. It also seems that in the North Sea concrete gravity foundations are more cost effective. Concrete gravity would seem to have potential to become the future foundation concept for offshore wind, and ENERGI E2 intends to exploit the potential of using these foundations.

By Per Vølund, ENERGI E2 A/S, Denmark
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