Finland-headed energy and marine technology group Wärtsilä Oyj has announced that it has been contracted by Swedish ferry operator Stena Line to carry out and convert some of its vessels to operate with methanol fuel. The conversions will include the fuel supply system and engine modifications, as well as integrating the new installations with the ships’ existing systems.
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As methanol is one of the key components of decarbonization in the maritime industry, this contract will equip the vessels with unmatched fuel flexibility, thus marking an important milestone in Stena Line’s journey toward becoming a leader in sustainable shipping.
Converting ferries for methanol fuel will enable them to be compliant with various existing and upcoming regulations, including the Carbon Intensity Indicator (CII), FuelEU Maritime, and the International Maritime Organization (IMO) 2050 greenhouse gas (GHG) reduction target.
As we continue to implement our strategy to decarbonize all our operations, we see methanol as a viable alternative fuel that will help us achieve this ambition. Wärtsilä has proven its capabilities to carry out the necessary conversions. This was shown eight years ago when they converted the Stena Germanica to operate with methanol, and our experience from this ground-breaking innovation has been very positive, said Ian Hampton of Stena Line.
The full scope of Wärtsilä’s supply package, the value of which has not been disclosed, will include fuel tank instrumentation and valves, transfer pumps, low-pressure pump skid, fuel valve trains, Methanol Fuel Pump Units and the automation of the system, engine conversions, and automation upgrade for the engine control room.
The conversions are scheduled to take place in 2025.
We have had close cooperation with Stena Line for many years and we are pleased to be supporting them again in this important conversion project. Like Stena Line, Wärtsilä is committed to making decarbonized shipping operations a reality, and we have invested heavily in developing our engine portfolio to be capable of utilizing carbon-neutral and zero-carbon fuels, commented Roger Holm, President of Wärtsilä’s Marine Power business.

