IHI Power Systems

NYK has announced that the tugboat Sakigake has been completed, and will enter three months of commercial trials in Yokohama harbor and Tokyo Bay. Thanks to retrofits, Japan’s first LNG-fueled vessel has now become Japan’s first ammonia-fueled vessel.

GE Vernova and IHI Corporation will proceed to the engineering and testing phase for their ammonia gas turbine roadmap for Asia. Based on their efforts in 2022 to demonstrate a low-N₂O combustor for a 2 MW, 100% ammonia-fired turbine, IHI will lead development of a two-stage combustor for larger-scale gas turbine models.

Successful testing has been completed at IHI’s facilities in Ota, Japan. A four-stroke marine engine - fully integrated with exhaust gas aftertreatment and fuel supply systems - produced stable operations running on up to 80% ammonia fuel. Emissions of dinitrogen monoxide (N₂O) and ammonia slip were reported as “virtually zero”.

Singapore-based Ocean Network Express has signed contracts with two ship-builders for construction of five ammonia-ready VLCCs each (ten total), to be delivered in 2025. In Japan, NYK Line, IHI Power Systems and ClassNK will develop, deliver and fuel an ammonia-powered tugboat for the City of Yokohama, with the vessel to be delivered and working in the port in 2024.

In recent weeks, the Japanese shipping company NYK Line has announced a series of high-profile research and development collaborations that aim to establish ammonia fueled vessels and fuel supply. Its partners in these projects include classification society Class NK, engine manufacturer IHI Power Systems, and shipbuilder Japan Marine United Corporation. Three vessel types have been announced, so far, including an ammonia-fueled ammonia gas carrier, an ammonia barge for offshore bunkering, and an ammonia-fueled tugboat (for navigating the barge). Pushing beyond the initial research phase, these collaborations aim for commercialization and to put these vessels “into practical use.”