Design and physical-based simulation analysis of NH3 distribution systems for vessels

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Κωστούρος, Ευθύμιος

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Because of the global environmental crisis that the planet is experiencing today, there is a global trend to turn to alternative energy sources that do not harm the environment, as humanity has done so far. Following the European Union’s mandatory limits on harmful emissions in maritime, the transition from conventional to alternative fuels is seen as the most promising route to achieving greenhouse gas reductions. In this context, this diploma thesis investigates the integration of ammonia (NH3) as an alternative marine fuel. Detailed descriptions of ammonia distribution systems outline the complexities of fuel storage at high pressures and controlled temperatures, followed by efficient delivery to main engines through sophisticated pumping and heating mechanisms. Simulation and modeling aspects using Simscape are meticulously detailed, addressing assumptions, simulation domains, and selection criteria for modeling components like storage tanks, pipelines, pumps, and heat exchangers. The thesis delves into a comprehensive analysis phase, leveraging sensor data to monitor critical variables across the distribution network. Insights from pressure, temperature, and flow rate readings inform optimizations in system design, highlighting strategies for minimizing energy losses, enhancing thermal efficiency, and ensuring operational safety. In conclusion, this research contributes significant findings to the field of maritime fuel systems, demonstrating the efficacy of ammonia as a sustainable alternative amidst evolving regulatory landscapes. Recommendations for future research and development focus on scaling up technology adoption, refining simulation methodologies, and advancing infrastructure requirements to support the widespread implementation of ammonia-based marine fuels.



Design, Ammonia fuel, Simulation, Operational efficiency, Simscape analysis, Marine fuel systems