Captain Sebastian Kisser, left, in conversation with the Development Manager in Bugsier, Sven Schröder, aboard the tugboat ”Bugsier 10” shortly before the departure of the ship for offshore operations in the North Sea.
BY JENS NØRGAARD
THE COST OF OFFSHORE WIND HAS TO BE REDUCED The German tug operator Bugsier and Finnish Wärtsilä Deutschland may have found the solution to, how the installation of future new wind farms offshore can find further savings, compared to the 40 percent that Angela Merkel’s government has demanded from 2020.
he price of the large wind farms in the North Sea and especially in the German Bight is so massive, that the power transmitted in the country threatens to ruin the consumer economy. This was never the intention, said Vice Chancellor and Economy Minister Sigmar Gabriel, when he inaugurated the wind farm Danish German west of Esbjerg last year. The Minister made it clear, not only for the developer of Danish German offshore wind farm - Swedish Vattenfall and Stadtwerke München, but just as much to others with similar construction plans. The government is done writing checks as subsidies just because they have decided that the German energy consumption will come from green energy after the nuclear accident in Japan on 11 March 2011.
danish maritime magazine
/ PAGE 28
LEAN LOGISTICS The solution to installing costs is perhaps the logistics in the form of a well-established feeder service for installation ships out on the fields. It is called Lean logistics and has been used on large and complex construction projects such as the Great Belt Bridge, the giant department store Fields in Amager or now at the super hospitals and on the waterfront in Aarhus and Copenhagen Metro and more. Lean is about organizing things in an orderly fashion so that each thing in its place at the right time, so there are no gaps in the large construction to increase the cost of the project. Two years ago, Maritime Denmark was presented with the first pilot project in Cuxhaven. It was carried out by German offshore winds pioneer, captain and ship owner, Andreas Wulf, tugboat
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company Otto Wulf GmbH & Co. KG in Cuxhaven. By sealing 70-meter mono piles at both ends and thus made them seaworthy – the piles weigh 900 tons each - one of Wulfs tugs boats pulled the posts and towers to the offshore installation ships at the wind farms in the German Bight. The results were positive! It was then decided that the 39 mono piles to be set on the wind farm Baltic II of Rügen, should follow the same procedure from the base port of Sassnitz. SUCCESSFUL TESTS By allowing the installation vessel to stay at the fields instead of them picking up the plies or towers on their own, a lot of time was saved. The feeder concept meant that the installation ship had time to install three piles per day offshore before the next shipment from Sassnitz was ready.