Norwegian marine services group Østensjø Rederi AS has christened their new offshore construction vessel, Edda Freya, featuring a hybrid diesel-electric system powered in part by a lithium ion battery.
The new vessel was designed and built for the Greater North Sea market and utilizes the environmentally friendly Corvus Energy ESS (Energy Storage System).
The subsea construction vessel, with its highly reliable propulsion and DP3 system, was designed with a focus on cable laying operations, offshore construction and IMR operations. The vessel’s first mission will be with DeepOcean, performing installation work for Statoil on the Maria development in the Norwegian Sea and specifically, the modification of the Statoil platforms Kristin and Heidrun.
The Edda Freya, with a length of 150 meters, a width of 27 meters and 2,300 square meters of total deck space. The vessel is equipped for such offshore work with a 150T dual tensioner vertical lay system and a 3000-ton carousel situated below deck.
The fuel saving, environmentally friendly propulsion system (Siemens BlueDrive PlusC) was implemented by Siemens in cooperation with Østensjø Rederi. By using variable rotational speed with optimal operation of the diesel generators in combination with the Corvus ESS, the system is expected to significantly reduce fuel consumption and the emissions of nitrogen oxides (NOx) and greenhouse gases (CO2/methane).
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