Wärtsilä launches new multi-fuel maritime engine

Wärtsilä has just launched its medium-speed, 4-stroke, Wärtsilä 25 engine, intended to be the first Wärtsilä engine to run on ammonia fuel. From 2023 a technology upgrade will be commercially available to allow the engine to run on alternative fuels like ammonia, with a fully-compliant NOx abatement system already available when running on fossil-based fuels. At the recent Australia conference, MAN ES reported that their two-stroke ammonia engine will be commercially available in 2024, with testing to commence next year.


Developing ammonia maritime engines & fuel: a collaborative approach

The latest episode of Maritime Ammonia Insights webinar centred around collaboration, leadership & Singapore: three critical elements in the maritime ammonia transition. Sofia Furstenberg Stott was joined by Peter H. Kirkeby (MAN Energy Solutions) and Yi Han Ng (Maritime and Port Authority Singapore), who discussed timelines for engine development, the benefits of a consortia approach, and the all-important safety & technical progress of maritime ammonia technologies.


Singapore: investments, a green corridor partnership and a new bunkering vessel project

Singapore’s sovereign wealth fund GIC and UK-based Carlyle will both invest in the development of Eneus Energy’s renewable ammonia project pipeline, with plants in the US and UK planned. The Maritime & Port Authority Singapore and Port of Rotterdam have agreed to establish a green maritime corridor by 2027. The agreement will help accelerate the deployment of alternative maritime fuels like ammonia on the critical shipping route, which links two of the world’s largest bunkering ports. And a trio of organisations - PaxOcean Engineering, Hong Lam Marine and Bureau Veritas will jointly develop an ammonia bunkering vessel design.


MAN Energy Solutions 2 stroke Ammonia engine

The marine industry is convinced that Ammonia is not only a very strong candidate as a future fuel, but also that Ammonia will be one of the leading future fuels. MAN Energy solutions has worked since 2019 on the development of a two stroke engine burning Ammonia by using the Diesel principle (as used for other fuels such as Methane , Methanol, Ethane and LPG) In this presentation, we will give an update on the engine design, which we will start testing in Copenhagen in Oct. 2022. The first ammonia engine (with final engine design and combustion process) is scheduled…


Maritime actors push on with overcoming ammonia fuel safety concerns

Two recent reports (one from Bureau Veritas & Total, the other from the Together in Safety consortium) illustrate just how seriously the maritime industry is pursuing low carbon ammonia fuel. While progress in the maritime ammonia space is impressive, safety risks are widely-acknowledged and work remains to be done.

Both reports identify key hazards facing adoption of ammonia as a maritime fuel, and echo points heard before in the development of methanol & LNG as maritime fuels: high-risk hazards currently exist that must be eliminated, mitigated or controlled. But Together in Safety concludes the way forward will be via collaboration & shared responsibility - something we’re already seeing in the multiple high-profile safety studies and consortia working around the globe. Thankfully, the willingness of significant maritime players to engage on ammonia and the momentum for change are both high.



The University of Amsterdam and TU Delft will lead an academic-industry consortium that will determine the feasibility of combining ammonia-fed solid-oxide fuel cells with internal combustion engines for maritime propulsion. The AmmoniaDrive project just received over €2 million in support from the Dutch government, and is the latest in a series of hybrid and fuel cell-based propulsion projects using ammonia as an onboard fuel.


Ammonia-powered vessels & maritime engines: development updates

This week we explore four announcements in the maritime ammonia space:

  • Færder Tankers Norway will receive $20 million in Enova funding to develop two ammonia-powered vessel designs: a tanker and a car carrier.
  • Mitsubishi Shipbuilding has completed a conceptual design for an LPG-ammonia dual-fuel VLGC, with Approval in Principle granted by ClassNK.
  • Delivery dates have been set for the first eight of Höegh Autoliners’ Aurora-class, ammonia-powered car carriers, with China Merchants Heavy Industry to deliver vessels from late 2024.
  • WinGD and Hyundai Heavy Industries will collaborate to deliver the first WinGD two-stroke engine capable of running on ammonia by 2025.


Eastern Pacific Shipping: adding ammonia power to the fleet

Eastern Pacific Shipping will lead development of an ammonia-powered, dual-fuel gas tanker. The carrier will be built by Hyundai Heavy Industries, registered under the Singapore national flag, classed by ABS, and will be the first vessel fitted with MAN Energy Solutions’ G60 two-stroke dual-fuel ammonia engine. As EPS steadily scales up its engagement with maritime ammonia, another high-profile consortium is accelerating a bunkering study in Singapore.


Ocean Network Express: adding ammonia power to the fleet

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.