Hybrid Offshore Supply Vessel

By Keith Henderson at March 15, 2012 08:47
Filed Under: Company News, Industry Events, Research & Development

DNV is heading the project FellowSHIP which is the name given to a joint industry R&D project to investigate sustainable energy generation for marine and offshore applications. The other partners are the owner of the test ship MV Viking Lady, Eidesvik Offshore and ship designer/power electronics developer Wärtsilä with overall financial support for the project being provided by the Research Council of Norway.

Caption: The hybrid 6,200 dwt MV Viking Lady Offshore Supply Vessel, owned by Eidesvik Offshore,
is the world’s first application of a merchant ship using fuel cell propulsion.
image credit: Eidesvik Offshore

The 6,200 dwt MV Viking Lady Offshore Supply Vessel was built in 2009 and has an LOA of 300 ft (92 m). beam of 69 ft (21 m) and draft of 31.5 ft (9.6 m). There are four Wartsila 6L34DF gensets each with an output of 2.6MW able to run on diesel or LNG (Liquefied Natural Gas) fuel. In addition there is a MTU 330kW fuel cell operating on LNG, which is the world’s first application in a merchant ship of a fuel cell providing propulsion power. Since its installation in 2009, it has been running successfully for over 18,500 hours.

The first phase of the FellowSHIP project started 2003 with a feasibility study, development of concepts and initial design studies. The second phase (2007-2010) finalized the development and installation of the marinizied fuel cell power package and its integration with new electronic systems, power electronics and control systems technology. The project also includes safety and reliability studies and approval and rule development.

The third and final phase (2011-2013) adds an energy storage capability in the form of a battery pack thereby creating a full hybrid energy system. The battery is a lithium-polymer type with a solid polymer composite electrolyte and is built up from 6.5 kWh modules to give a total capacity of 0.5 MWh and is capable of delivering 5MWh over a short period of time. A full scale hybrid installation would be expected to include a 2 - 3 MWh battery pack, but the 500 kWh pack is sufficient to demonstrate the technology. The battery pack and battery management system, supplied by Corvus Energy, Canada, is being tested on land will be installed on board in 2013.

Compared to a traditional ship, MV Viking Lady has annually reduced harmful NOx emissions by 180 t, an amount equal to emissions from 22 000 cars. CO2 emissions are reduced by 20 percent. A future hybrid power solution including LNG-fuelled steam turbines and fuel cells, could reduce the ship’s fuel consumption by up to 30-50 percent, CO2 emissions by up to 50 percent, and NOx , SOx and particle emissions to negligible values.

Caption: Cutaway drawing of the MTU 330kW fuel cell operating on LNG,
onboard the MV Viking Lady. Since its installation in 2009, it has been running
successfully for over 18,500 hours.
Image credit: MTU Friedrichshafen

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