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Van Oord Selects BAUER Spezialtiefbau for Piling Works for Saint-Brieuc Offshore Wind Farm

Power News - Published on Mon, 06 Jul 2020

Image Source: Saint-Brieuc Offshore Wind Farm Piling
The Dutch marine contractor Van Oord awarded German specialist foundation company BAUER Spezialtiefbau GmbH to install 190 bored piles at 62 locations for 3-legged jackets, as well as one substation location consisting of a 4 legged jacket foundation. Van Oord will start the offshore operations in 2021 with the installation of the bored piles using its offshore installation vessel Aeolus. The Aeolus will be assisted by a second vessel in 2022 to install jackets foundations. The commercialization will start in 2023.

BAUER Spezialtiefbau GmbH is going the provide and operate the drilling and grouting operations for the subsea operation, including the use of three newly designed BAUER Dive Drills DD 40 U, which will work simultaneously up to 47 m penetration depth in a rock structure up to 160 MPa and in a water depth of up to 37 m. Finally, onboard of OIV Aeolus Bauer will execute grouting operations to fix the 190 bored piles at the drilling location.

Saint-Brieuc offshore wind farm will be the first large-scale offshore wind farm in Brittany and one of the first in France to obtain all the necessary government permits for its construction and operation. It will be built on an area of 75 square klometers and comprise 62 turbines with a capacity of 8 MW each. So in total, the wind farm will have a capacity of 496 MW. Located approxiimately 16 kilometers off the French coast, the wind farm will produce 1,820 GWh per year, the equivalent of the annual electricity consumption of 835,000 people including heating.

Iberdrola group, in collaboration with French companies RES and Caisse des Dépôts, both belonging to the consortium Ailes Marines of Iberdrola, has finished the first phase of construction of the project: analysis of the technical and environmental conditions of the site. This first step involved installing three wind measurement systems in the area where the farm is located and which have recorded the wind power potential in the area during the last two years.

Saint Brieuc will also have Spanish involvement since its 62 jackets, the structures that support offshore wind turbines, and their corresponding piling will be entirely built by Navantia-Windar in Fene in Coruña and Avilés in Asturias, respectively. The final assembly of all component parts will be completed at the Galician shipyard facilities.

The Dutch marine contractor Van Oord has been selected to transport and install the 62 jacket foundations and offshore substation. Van Oord will start the offshore operations in 2021 with the installation of the pin piles and the offshore substation. To do so, it will deploy its offshore installation vessel Aeolus, which was purposely built to construct offshore wind parks. The Aeolus will be assisted by a second vessel in 2022.

Siemens Gamesa Renewable Energy will be making the turbines for the wind farm, 207 metres high each. They will be equipped with state-of-the-art direct drive technology and their blades, measuring almost 82 metres in length, will deliver a swept area that is 18 % larger than the previous model along with 20 % higher annual power production compared to their predecessor. The Saint-Brieuc wind turbines will be built in France, at Siemens Gamesa Renewable Energy's bespoke industrial facility, located in the port of Le Havre, where blades, nacelles and generators will be fabricated.

On the other hand, submarine connection cabling systems will be provided by Prysmian Group. Prysmian will install and commission 90 km of 66 kV alternating current high.voltage connection cabling and three XLPE insulation hubs. The cable hubs will be manufactured at the group's centres of excellence in Montereau-Fault-Yonne and Gron in France and will be assembled and finished in Nordenham in Germany, providing the French market with locally produced, state-of-the-art Prysmian cabling. The system is expected to be up and running by the end of 2022.

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Posted By : Yogender Pancholi on Mon, 06 Jul 2020
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