Key Findings
Japan Engine Corporation (J-ENG) has successfully concluded land-based factory tests for its “6UEC35LSGH” hydrogen engine designed for large commercial vessels. Conducted as part of a NEDO Green Innovation Fund project, these tests demonstrated a remarkable hydrogen co-firing rate exceeding 95% and achieved over 95% reduction in greenhouse gas (GHG) emissions compared to traditional heavy fuel oil engines, marking a significant milestone for shipping decarbonization.
Technical / Clinical Details
The “6UEC35LSGH” is a dual-fuel engine that leverages J-ENG’s extensive experience in diesel engine technology, operating primarily on hydrogen with a minimal amount of heavy fuel oil. During testing, the engine achieved a hydrogen co-firing rate of over 95%, meaning more than 95% of its energy input came from hydrogen, with less than 5% from heavy fuel oil. This high hydrogen utilization virtually eliminates sulfur oxides (SOx) and particulate matter (PM) emissions and drastically reduces GHGs. Nitrogen oxide (NOx) emissions are anticipated to meet International Maritime Organization (IMO) regulations when combined with post-treatment technologies such as Exhaust Gas Recirculation (EGR) and Selective Catalytic Reduction (SCR). The factory tests successfully validated the engine’s designed performance and stable operation, confirming its reliability and durability under demanding conditions.
Background & Context
The International Maritime Organization (IMO) has set ambitious targets to reduce GHG emissions from international shipping by 50% from 2008 levels by 2050. Achieving these goals necessitates a fundamental shift to low-carbon and zero-carbon fuels, with hydrogen emerging as a leading candidate. However, challenges related to liquefied hydrogen storage, supply infrastructure, and engine development remain significant. J-ENG’s project is a national endeavor to overcome these hurdles and make decarbonization of large commercial vessels a reality. The Japanese government, through its Green Innovation Fund, actively supports the development of decarbonization technologies across various industries, including maritime, making this achievement a prime example of their strategic investment.
Strategic Significance & Outlook
The “6UEC35LSGH” is slated for installation on a 17,500 DWT multi-purpose vessel in January 2027, representing a critical step towards the practical implementation of hydrogen engines in large commercial shipping. Subsequently, sea trials are scheduled to commence in April 2028 to evaluate its performance, durability, and stability under real-world operating conditions. Data collected from these trials will be invaluable for shaping future hydrogen-fueled ship designs, operational standards, and international regulatory frameworks. J-ENG’s hydrogen engine technology is expected to play a crucial role in realizing a sustainable future for the shipping industry and enhancing Japan’s maritime sector’s global competitiveness.
Source: https://inspenet.com/en/news/japan-engine-tests-hydrogen-engine-for-large-commercial-vessels/
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