en.Wedoany.com Report, Japan Engine Corporation (J-ENG) recently announced the successful initiation of hydrogen co-combustion operation in all cylinders of its large low-speed two-stroke hydrogen-fueled engine, the 6UEC35LSGH. This engine is the world's first full-scale hydrogen-fueled power system unit planned for installation on an actual ship. It will power a 17,500-DWT multi-purpose vessel designed and built by Onomichi Dockyard.
According to J-ENG, the 6UEC35LSGH engine has achieved a hydrogen co-combustion ratio exceeding 95% at 100% load, confirming its effectiveness in reducing greenhouse gas emissions and ensuring stable operation. Verification testing will continue to further optimize performance. The engine is scheduled for shipment in January 2027 for installation on the hydrogen-fueled multi-purpose vessel at Onomichi Dockyard. Its hydrogen fuel supply system is being developed and manufactured by Kawasaki.
This 17,500-DWT multi-purpose vessel is planned to undergo a three-year demonstration operation starting from fiscal year 2028, under the operation of MOL and MOL Drybulk. Currently, the detailed design of the vessel is progressing smoothly, and relevant parties have reached an agreement on the specifications of the facilities required for the hydrogen-fueled ship. During the development of the engine and fuel system, ClassNK will conduct safety assessments.
In recent years, the development of hydrogen-fueled ships has progressed in Japan and internationally, but most projects focus on short-distance, low-power operations, such as sightseeing boats or tugboats. In contrast, J-ENG's 6UEC35LSGH engine combines high efficiency, high power, and liquid hydrogen fuel, enabling long-distance, long-duration, and high-power operations. It marks a significant key technology milestone towards the practical application of large oceangoing hydrogen-fueled commercial vessels.
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