What is it about?
This study uses advanced computer simulations to design and evaluate a new ammonia-diesel combustion system for large two-stroke marine engines, aiming to drastically reduce greenhouse-gas emissions while keeping engine performance stable.
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Why is it important?
Shipping is responsible for nearly 3% of global greenhouse-gas emissions. Ammonia is a carbon-free fuel that can be produced using renewable energy. This work shows that existing large marine engines can be retrofitted to run mainly on ammonia, reducing CO₂ emissions by up to 95% and overall GHG emissions by more than 85%. The study provides engineering evidence that ammonia combustion can be stable, efficient, and compatible with today’s marine engine architecture, helping accelerate the decarbonization of the maritime sector.
Perspectives
This research opens the path toward real-world deployment of ammonia-powered ships. Future work will refine the injection strategy, study emissions control (especially NOx and N₂O), and support experimental validation of the proposed system. As green ammonia production scales up, these findings can guide engine manufacturers and ship operators in adopting low-carbon propulsion technologies at large scale.
Dr. Francisco José Arnau Martínez
Universitat Politecnica de Valencia
Read the Original
This page is a summary of: Computational Analysis of an Ammonia Combustion System for Future Two-Stroke Low-Speed Marine Engines, Journal of Marine Science and Engineering, December 2024, MDPI AG,
DOI: 10.3390/jmse13010039.
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