Hyundai Heavy Industries (HHI) has completed class approval testing for its HiMSEN Ammonia Dual-Fuel Engine, a four-stroke model that will be fed by direct high-pressure ammonia fuel injection.
The American Bureau of Shipping has granted AiP for two new autonomous technology packages developed by Korea Shipbuilding & Offshore Engineering and Hyundai Heavy Industries: an unmanned ammonia engine room, plus an AI safety package with rapid-response capabilities.
A series of new AiPs underlines momentum for marine ammonia fuel. For bunkering, barges and a range of jetty-less transfer terminals will enable safe operations. Fuel systems that can be retrofitted to existing vessels are also under development, as is an ammonia-powered “feeder” container vessel to complement larger designs.
Approval of interim guidelines for the use of maritime ammonia fuel is anticipated at an upcoming IMO committee meeting in December, giving the shipping industry its first international standard for the safe operation of vessels using marine ammonia fuel.
The biennial SMM event in Hamburg featured a number of ammonia announcements from across the entire fuel value chain, including deployment timelines for MAN’s two-stroke engines, high-pressure fuel pumps, bunker and container ship designs, and technology integration partnerships.
Wärtsilä has been contracted to supply the total technology package for the conversion of the Viking Energy to run on ammonia fuel. The original plan to retrofit the vessel with a 2 MW solid oxide fuel cell system was delayed by supply chain and development challenges, but SOFC developer Alma Clean Power will continue to test and scale its direct ammonia-fed technology for maritime applications.
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.
An NYK-led consortium has been granted engine room safety accreditation by ClassNK for its ammonia-fueled, medium gas carrier design. The vessel is due to hit the water in 2026. Starting later this decade, NYK has also committed to transport renewable ammonia from Sembcorp’s under-development production project in India to Kyushu, Japan.
The FuelEU Maritime Regulation is set to launch on August 31, requiring companies to submit monitoring plans ahead of its full implementation in January 2025. With modest initial targets and sophisticated compliance mechanisms like banking, borrowing, and pooling, the scheme offers flexibility while driving innovation in sustainable maritime technologies. The scheme also offers extra incentives for companies to proactively embrace Renewable Fuels of Non-Biological Origin (RFNBOs), before mandates enter into force next decade.
The pair will explore the integration of Amogy’s ammonia cracking technology with Yanmar’s under-development hydrogen internal combustion engine. Yanmar is a leading provider of marine engines for small-scale marine propulsion, and has also commercialised a hydrogen fuel cell system.