(161b) Dynamic Simulation Analysis on Supply Control Stability and Emergency Response for Ammonia-Fueled Ships

This report discusses dynamic simulation analysis of fuel supply control stability for ammonia-fueled ships and the results of dynamic simulations on the recovery and separation of residual ammonia gas in pipelines during emergencies.

The International Maritime Organization (IMO) has revised its GHG reduction strategy, targeting zero GHG emissions in the maritime industry by 2050. Ships, which are designed for long-range voyages and extended service lives, primarily use heavy fuel oil today, though LNG adoption is increasing. Achieving zero emissions by 2050 will require the introduction of zero-emission fuels, such as ammonia and hydrogen, by around 2030, marking a significant energy transition for the maritime industry.

In Japan, core technologies for the practical application of zero-emission ships using hydrogen and ammonia fuels, including engines, fuel tanks, and fuel supply systems, are under development, with demonstration voyages of ammonia-fueled ships scheduled to begin in 2026. However, due to ammonia's toxicity, it is crucial to fully recover residual ammonia gas within the fuel supply system in emergencies, and separating ammonia from nitrogen gas used for purging presents a technical challenge.