Viking Lady, Offshore Supply Vessel OSV

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Eidesvik Offshore

First Offshore Vessel to Validate Corvus ESS Performance

Viking Lady OSV, First Offshore Vessel to Validate ESS Performance

Viking Lady OSV, Offshore Supply Vessel
A state-of-the-art offshore supply vessel, Eidesvik Offshore’s Viking Lady, is designed to safely service offshore installations in the extremely harsh waters of the North Sea. As the first merchant ship to use a fuel cell as part of its propulsion system, the Viking Lady was already one of the world’s most environmentally friendly ships. In the second phase of the Fellowship project, the vessel was outfitted with a lithium ion battery pack to enhance efficiency further.

For the third phase, a comprehensive field measurement program was conducted by Eidesvik and Wartsila during 2014/15. The Viking Lady achieved a fuel consumption reduction of 15% on average, showing strong performance in all operating modes. Phase 3 validates the worth of the hybrid OSV concept and indicated areas for improvement in ship system design and battery dimensioning.

Corvus Energy  ESS Specifications:
Name: Viking Lady
Type: 92.2m Offshore Supply Vessel (OSV)
Duty: North Sea Offshore Drilling Platform Service and Support
Owner: Eidesvik Offshore ASA
Location: Høvik, Norway
Pack: 68 x 6.5kWh Corvus AT6500 Battery Modules
Capacity: 442kWh
Bus Voltage: 856VDC
Partners: Eidesvik Offshore ASA, Wärtsilä, DNV, Corvus Energy

Corvus Energy ESS - Viking Lady OSV - Battery Room

North Sea

Viking Lady OSV operates in the North Sea.

Potential % fuel consumption savings
Metric tons of NOx mitigated
Emissions mitigated in number of cars annually

Reducing Emissions

The primary benefits of a hybrid system for a ship like the Viking Lady, is a 20-30% reduction in fuel consumption and CO2 emissions. This is achieved through smoother and more efficient operation of the engines.
Compared to a traditional ship, the Viking Lady has reduced harmful NOx emissions by 180 tonnes, an amount equal to annual emissions from 22 000 cars. CO2 emissions are reduced by 15%.

World's Most Environmentally Friendly Ship

The integration of Corvus lithium ion battery technologies with Siemens Blue Drive is providing revolutionary operational efficiencies to marine propulsion systems. The energy management system of the Edda Ferd will dynamically set engine loads to real time optimal operation levels with active battery assist. During Dynamic Positioning (DP) operation the advantages are substantial as the Corvus Energy Storage System absorbs load fluctuation, allowing the diesel generators to operate more efficiently.

Operating Profile
As can be seen in the graph, Dynamic Positioning requires a large portion of vessel energy resources. Major fuel savings can be captured in the efficiencies that Corvus Energy Storage Systems bring to active DP operations, as well as waiting offshore and in-harbour low speed manoeuvering.

CORVUS Energy Storage System ESS Benefits:

  • Low emission of greenhouse gases
  • Low fuel consumption
  • Low investment cost compared to gas/dual fuel systems
  • Reduced maintenance cost on diesel engines
  • Increased lifetime of diesel engines, especially for high-speed engines
  • Reduced space, volume and weight of the electrical system
  • Increased overall efficiency of the electric system
  • Clean power supply to all auxiliary consumers

Corvus Energy Storage System (ESS): AT6500 Module

The Marine Industry Standard in Energy Storage. The only lithium battery Type-Approved by DNV-GL, Lloyd's Register and ABS.
    Excellent cycle life & shelf life
    0°C to +50°C
    IP67 enclosure
    High energy and power density with a small system footprint
    Industry leading power handling at megawatt-hour scale
    Infinite scalability at megawatt power levels
  • The only lithium battery Type-Approved
    by DNV-GL, Lloyd’s Register and ABS