Van Oord and AdBm Technologies have successfully demonstrated a new noise mitigation system for use during pile-driving operations and plan to use it on upcoming projects in Dutch waters.
Tested with support from TNO, AdBm’s noise mitigation system (NMS) reduces underwater noise resulting from offshore pile driving when foundations for offshore wind turbines are driven into the seabed. This means less disturbance for marine mammals near the construction site. The innovative technology and trials were funded through a Renewable Energy Grant from RVO and supported by TKI Wind op Zee.
“The test results were favourable,” said Van Oord. “We will be able to use the NMS on future windfarms, including during the construction of the Borssele 3, 4 and 5 windfarms.”
The NMS uses acoustic resonators designed and produced by AdBm which reduce noise levels during pile driving. Specific noise frequencies can be targeted. “This makes the NMS stand out from existing systems,” said Van Oord.
The deployment system for the NMS was designed and built at Van Oord. The company says it works like a window blind “that can be put up and down easily.”
The development of this innovative system and the related trials were funded through a Renewable Energy Grant from RVO and supported by TKI Wind op Zee.
“The results of the tests showed that, in combination with a Big Bubble Curtain (BBC), the NMS meets Dutch and Belgian standards for noise emissions,” said Van Oord, noting that it anticipates being able to further optimise the system in future.