The Norwegian shipowning company Havila Kystruten has ordered four newbuild ropax vessels of Havyard 923 design and Rolls-Royce Commercial Marine will provide power and propulsion for all four ships.
From January 2021, Havila Kystruten will operate four ships on the coastal route between Bergen and Kirkenes, Norway. The company has contracted Spainís Astillero Hijos de J Barreras shipyard to build two of the cruise ferries and Turkeyís Tersan yard to construct the remaining two.
Rolls-Royce will provide a fully integrated LNG power and propulsion solution to all four ships. This includes two LNG fuel tanks with process system, and control and safety systems, four Bergen gas engines, Azipull main propulsion thrusters with permanent magnet (PM) drive motor, PM tunnel thrusters, and Neptune 200 stabilisers.
The LNG fuel system from Rolls-Royce will supply Bergen gas generator sets. Each vessel will have two engines with nine inline cylinders, and two with six cylinders. The engines can operate on variable speed to reduce both fuel consumption and emissions. Two separate LNG fuel systems are designed in co-operation with the shipowner and include flexibility to bunker both tanks from the same side of the ship and the option to supply the front and aft machine rooms from both tanks. This ensures high redundancy and flexibility during operation.
Rolls-Royce commercial marine technical product manager for LNG fuel systems Steinar Oppedal said ďHavila Kystruten has chosen an LNG fuel system that builds on our long experience with these type of systems, designed to be robust and reliable in rough weather conditions. No less important is the fact that the system and its engines will provide a significant reduction in emissions compared to conventional diesel engines.Ē
The chosen Bergen engines series reduces total greenhouse gas emissions by about 20% compared to a similar diesel engine, and is IMO Tier 3-compliant. The whole LNG system is designed for safety with double-walled stainless steel containment.
In May 2018, the Norwegian Government awarded 11 new licenses for the passenger and cargo route from Bergen to Kirkenes. For the first time, the licenses have been split between two operators, and new entrant, Havila won four of the 11 licenses. The route has, since its beginning in 1884, kept coastal Norway connected, with 34 ports seeing daily ship calls. The new agreement starts in January 2021, and a key requirement from the Ministry of Transportation has been to reduce CO2 emissions.
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