DNV and FellowSHIP project partner Eidesvik Offshore are testing a 500-kilowatt lithium polymer battery pack to be installed early next year in Eidesvik’s Viking Lady OSV.
The ship with Wärtsilä prolusion is one of three Eidesvik Offshore vessels operating on LNG.The North Sea offshore supply vessel is already the first in the world with a fuel cell, DNV says, as it was fitted in 2009 with a methane-fed, 330-kilowatt molten carbonate unit from Germany’s MTU Onsite Power.
Fuel savings are projected at 20% to 30%, and, given current high fuel costs, “the return on investment period for the hybrid system is estimated to be less than two years,” DNV says.
“We know that the hybrid system will reduce the energy consumption,” DNV project manager Bjørn-Johan Vartdal says in a release. “When operating, for example, on dynamic positioning, there will be a major fuel saving potential.
“When in harbor, too, the ship should be able to operate on the fuel cell and its battery power alone, which will reduce emissions significantly. For environmentally sensitive areas, this will be an essential benefit. Additional benefits are related to reductions in machinery maintenance costs and in noise and vibrations.”
The robust lithium polymer battery unit is supplied by Vancouver-based Corvus Energy, which uses cells from Dow Kokam. For a commercial installation, a larger battery unit, on the order of 2 megawatts, is expected.
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