BP And EnBW To Run Suction Bucket Trials At UK Offshore Wind Farm Sites
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
On 30 December, the vessel North Sea Giant is expected to start suction bucket trials within the array areas of the Mona and Morgan offshore wind farm sites, located off North West England and North Wales.
These are the first three paragraphs.
The trials will run for an estimated 32 days, during which time the vessel will be lifting a suction bucket and setting it down on the seabed, and using subsea pumps to drive the suction bucket into the seabed and back out.
The campaign is expected to consist of around 20 suction bucket trials, subject to weather conditions.
In their environmental impact assessment (EIA) scoping reports, issued last year, BP and EnBW state that a number of foundation types are being considered for the two proposed offshore wind farms and that the type(s) to be used will not be confirmed until the final design, after the projects are granted consent.
It sounds sensible to try out different types of foundations, but what is a suction bucket?
This page on the Ørsted web site is entitled Our Experience With Suction Bucket Jackets, explains how they work and are installed.
This is the first paragraph.
Monopiles (MPs) are currently the most commonly used foundation solution for offshore wind turbines with 81% of offshore wind turbines in European waters founded on MPs at the end of 2019 (Wind Europe, 2020). Where site conditions do not allow for an efficient or practical MP design, a number of alternative foundation solutions are available, including the suction bucket jacket (SBJ), piled jacket, gravity base or even a floating solution.
These two paragraphs, indicate when Ørsted has used SBJs.
Ørsted installed the world’s first SBJ for an offshore WTG at the Borkum Riffgrund 1 offshore windfarm in Germany in 2014.
Since the installation of the Borkum Riffgrund 1 SBJ, Ørsted has been involved in the design and installation of SBJs at the Borkum Riffgrund 2 and the design for Hornsea 1 offshore wind farms. At Hornsea 1, overall project timeline considerations and limitations of serial production capacities precluded the use of SBJs, and therefore the project chose an alternative foundation type.
It will be interesting to see how BP and EnBW’s trial gets on.
The Anonymous Widower 