288MW Baltic 2 enters 'hot phase'

The “hot phase” has commenced at EnBW’s 288MW Baltic 2 offshore wind project, with GeoSea’s Goliath vessel setting sail this morning from Rostock to begin installing the 80 subsea foundations.

Working in a joint venture alongside Hochtief, GeoSea will sink a combination of monopile and jacket foundations into the seabed some 32km – or a 12-hour sail – north of the Baltic Sea island of Rügen.

The choice of monopile or jacket will be based on the water depth, which varies widely from 23m-44m.

The first phase will focus on the jackets, which will be transported six at a time from Rostock. Three pin piles for each jacket will be precisely stuck into the seabed before the jackets themselves are lowered into place and anchored.

The installation of a single jacket can take up to five days, EnBW says.

The jackets have been fabricated by Denmark’s Bladt Industries, while Bladt and Rostock-based EEW SPC are providing the monopiles, transition pieces and pin piles.

The foundations will hold 80 Siemens 2.3MW turbines in place, which are expected to generate some 1.2 billion kWh of power each year.

EnBW’s – and Germany’s – first commercial offshore wind farm, the 48MW Baltic 1, has been supplying power to the German grid since 2011.