DEME continues German successes

09 Mar 2017

The 7MW Siemens turbines will have a rotor diameter of 154 metres

The 7MW Siemens turbines have a rotor diameter of 154 metres

The GeoSea division of the DEME Group’s offshore marine engineering division and Siemens have concluded an EPCI foundation contract for the Hohe See offshore wind farm.

The new contract confirms Germany as a key market for the
Belgian dredging, environmental and marine engineering group following its
recent acquisition of the offshore assets and personnel from its former German
partner Hochtief. 

The Hohe See offshore wind farm which is owned equally by
Enbridge and EnBW is situated approx. 90kms north of the island of Borkum in
the German North Sea with EnBW in charge of the development and the day by day
running of the wind farm once it is operational. The project will cover an area
of around 40 square kilometres with water depths of up to 39m. With a total
installed capacity of 497MW, the Hohe See wind farm is currently the biggest
planned offshore wind project in Germany. The GeoSea contract includes the
design, engineering, procurement, fabrication and installation of 71
foundations consisting of a grounded monopole and its associated transition
piece. Turbine installation is scheduled to start in the first half of 2018.

DEME has a long track record in the German marine
infrastructure market dating back from 1968 through its subsidiary Nordsee
Nassbagger und Tiefbau GMBH in Bremen and was an early pioneer in the
development of offshore wind in most of Europe.

Christopher Iwens, General Manager DEME’s German
subsidiaries commented, “The conclusion of this contract is a great achievement
and consolidates the company’s presence in Germany. The Hohe See offshore wind
project preparatory phase will be taken care of by our specialist teams located
in our new offices in Bremen.” The company is continuing its large recruitment
campaign to work on this new contract.

“After successful participation in a series of other
offshore wind farms in Germany (Nordsee One, Godewind, EnBW Baltic II, Borkum
Riffgrund 1, Amrumbank, Alpha Ventus and Borkum West II), the Hohe See contract
is an important demonstration of the client’s trust in GeoSea’s expertise based
on a combination of high tech, know-how and entrepreneurship.”

The turbines to be used on this project will have a rotor
diameter of 154 metres. These will be Siemen’s units, each one capable of
producing 7MW. The total cost of this wind farm is estimated at €1.8 billion
and the HoHe See project is part of a major expansion of wind power
installations in Germany’s sector of the North Sea. It is estimated that this
wind farm will generate enough power to supply 352,000 homes. The wind turbines
will connect in to the existing transmission infrastructure of the BorWin3 Converter
with two export cables operating at 155 kV. The array cable length is estimated
at 100kms.

By Dag Pike

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