Østensjø Rederi AS, a Norwegian shipowner, recently christened a new offshore construction vessel, Edda Freya: built for the Greater North Sea market, the vessel features an environmentally friendly, fuel saving diesel electric hybrid propulsion system by Corvus Energy.
The subsea construction vessel will take care of cable laying operations, offshore construction and IMR operations. Her first mission will be with DeepOcean, performing installation work for Statoil on the Maria development in the Norwegian Sea, the modification of the Statoil platforms Kristin and Heidrun.
The Edda Freya, 150-metre long and 27-metre wide, will be equipped for critical and high precision offshore work with a 150T dual tensioner vertical lay system and a 3000-ton carousel situated below deck.
Her 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 will significantly reduce fuel consumption and the emissions of nitrogen oxides (NOx) and greenhouse gasses (CO2/methane).
Corvus Energy provides high power energy storage in the form of modular lithium ion battery systems. Its battery systems provide sustained power to hybrid and fully electric heavy industrial equipment, including large marine propulsion drives.
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