World's first hydrogen-fuelled engine ready for sea trials in 2028

Japan Engine completes world-first hydrogen-fuelled marine engine

The Japanese company Japan Engine has completed the world’s first hydrogen-fuelled engine for large commercial vessels, reducing greenhouse gas (GHG) emissions by over 95% during land-based testing. This achievement is part of a larger project led by NEDO's Green Innovation Fund Project and involves collaboration with Kawasaki Heavy Industries and Yanmar Power Solutions.

Key Features of the Engine

The 6UEC35LSGH engine, developed through Japan’s New Energy and Industrial Technology Development Organization (NEDO), uses a high-pressure direct injection system to achieve stable hydrogen combustion. This design has enabled a hydrogen co-firing rate of at least 95%, significantly reducing emissions compared to conventional heavy fuel oil engines.

During the land-based testing conducted by ClassNK, the engine met expectations in terms of performance and emission reductions. The successful testing marks a significant milestone towards achieving carbon neutrality in international shipping by 2050.

Installation and Demonstration Testing

The hydrogen-fuelled engine will be installed on a 17,500 DWT multipurpose vessel to be built by Onomichi Dockyard Co., Ltd. for Mitsui O.S.K. Lines (MOL) and MOL Drybulk Ltd. The installation is scheduled for January 2027, with onboard demonstration testing planned to begin in April 2028.

ClassNK will provide safety assessments throughout the development of the engine, vessel design, construction, and operation. This ensures that all regulatory requirements are met before the engine can be deployed on a commercial scale.

Project Partners and Future Plans

In addition to Japan Engine, Kawasaki Heavy Industries is developing liquefied hydrogen bunkering equipment for the project. Yanmar Power Solutions is also involved in the development of marine hydrogen engines as part of their joint venture with NEDO.

The Blue Harmony project aims to accelerate the adoption of hydrogen-fuelled engines in maritime shipping by providing a comprehensive solution, including engine development, bunkering infrastructure, and safety assessments. This collaborative effort underscores Japan’s commitment to reducing emissions in the maritime sector.

What this means for operators

The successful completion of the world-first hydrogen-fuelled engine has significant implications for ship operators looking to reduce their carbon footprint. Operators can expect lower operational costs due to reduced fuel consumption, as well as enhanced sustainability credentials through the use of clean energy sources.

While the initial deployment is scheduled for a 17,500 DWT multipurpose vessel, the technology could be adapted for other ship types in the future, potentially revolutionizing the maritime industry’s approach to emissions reduction. Operators should consider this development as a strategic opportunity to align with international goals towards carbon neutrality.

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