In a groundbreaking initiative, Jan De Nul Group is currently installing 107 monopile foundations for the Gode Wind 3 and Borkum Riffgrund 3 wind farms off the coast of Germany, commissioned by Ørsted. To safeguard marine life during this project, a new low-noise installation technology was tested on three monopiles for Gode Wind 3 last winter. Developed by Ørsted, this technology proved successful, significantly reducing noise levels and potentially setting a new standard for future monopile foundations.
Ørsted, a Danish leader in offshore renewable energy, has pioneered this innovative jetting technology. By attaching it to the monopile, the resistance of the surrounding sandy seabed is lowered, allowing the foundation to sink into the seabed without the need for conventional hammering. This method not only minimizes noise pollution but also streamlines the installation process.
Working closely with Ørsted and Aarsleff, the Jan De Nul team executed this new installation method on three monopiles at Gode Wind 3 last winter. The results were impressive, with noise levels reduced by more than 99%, equating to a 34-decibel decrease compared to traditional methods. This achievement builds on other noise-dampening technologies employed at Gode Wind 3, such as the bubble curtain and the Hydro Sound Damper net, further demonstrating Ørsted’s commitment to protecting marine life.
Thus far, the heavy-lift vessel Les Alizés has installed approximately 75% of the monopiles for Gode Wind 3 and Borkum Riffgrund 3. Once operational, these wind farms will generate enough electricity to power 1.2 million German households, marking a significant milestone in the transition to renewable energy.
This advancement not only highlights the potential for quieter, more environmentally friendly offshore construction but also underscores the collaboration and innovation driving the renewable energy sector forward. Jan De Nul and Ørsted’s dedication to reducing the environmental impact of wind farm installations sets a precedent for future projects, paving the way for sustainable energy solutions that harmonize with the natural world.
