Simulation and analysis of a fuel supply system with vent control system for ammonia fueled ships
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Process system modeling and dynamic simulation of the ammonia fuel supply system for a 320,000 dwt Very large crude carrier (VLCC) were conducted in this study. Focusing on the International maritime organization (IMO) 2050 decarbonization goals and the potential of ammonia as a carbon-free fuel, key process parameters and engine performance for the ammonia fuel system design were analyzed. The process design was based on WinGD's X72DF-A-1.0 ammonia dual-fuel engine, evaluating fuel consumption, system efficiency, and vent control methods. The system was designed with a fuel supply mechanism utilizing both low-pressure and high-pressure pumps from the fuel tank, with ammonia fuel consumption at maximum output estimated at 9,384 kg/h. Additionally, instead of absorbing ammonia from operational ventilation into seawater, an absorption-based ammonia vent control system was proposed to meet relevant regulations (below 25 ppm), resulting in the production of less than 1 ton of wastewater for each set of vent operations. Through dynamic simulation using Aspen HYSYS, the operational stability of the system was verified, and optimal operating conditions for fuel change and vent control were identified. The study demonstrates that the ammonia fueled ship system meets IMO regulations and has potential as a viable alternative fuel.
Abstract
Process system modeling and dynamic simulation of the ammonia fuel supply system for a 320,000 dwt Very large crude carrier (VLCC) were conducted in this study. Focusing on the International maritime organization (IMO) 2050 decarbonization goals and the potential of ammonia as a carbon-free fuel, key process parameters and engine performance for the ammonia fuel system design were analyzed. The process design was based on WinGD's X72DF-A-1.0 ammonia dual-fuel engine, evaluating fuel consumption, system efficiency, and vent control methods. The system was designed with a fuel supply mechanism utilizing both low-pressure and high-pressure pumps from the fuel tank, with ammonia fuel consumption at maximum output estimated at 9,384 kg/h. Additionally, instead of absorbing ammonia from operational ventilation into seawater, an absorption-based ammonia vent control system was proposed to meet relevant regulations (below 25 ppm), resulting in the production of less than 1 ton of wastewater for each set of vent operations. Through dynamic simulation using Aspen HYSYS, the operational stability of the system was verified, and optimal operating conditions for fuel change and vent control were identified. The study demonstrates that the ammonia fueled ship system meets IMO regulations and has potential as a viable alternative fuel.
참고문헌 (15)
- IMO, "Initial IMO Strategy on Reduction of GHG Emissions from Ships", Resolution MEPC.304(72) (Adopted on 13April 2018), MEPC 72, Add.1, pp.2018, 1~10
- K. Bayramoğlu, "The effects of alternative fuels, cruising duration and variable generators combination on exhaust emissions, energy efficiency existing ship index (EEXI) and carbon intensity rating (CII)", Ocean Engineering, 302 (2024)
- H. Jang, "Regulatory gap analysis for risk assessment of ammonia-fuelled ships", Ocean Engineering, 287(Part 2) (2023)
- H. Xing, "Alternative fuel options for low carbon maritime transportation: Pathways to 2050", Journal of Cleaner Production, 297 (2021)
- S. Jeong, "Optimization study of BOG re-liquefaction process for ammonia fueled ship", Journal of Advanced Marine Engineering and Technology, 48(4), pp.167~176 (2024)
- S. CROLIUS, "Techno-Economic Challenges of Green Ammonia as an Energy Vector", pp.221~257 (2021), Elsevier Inc
- MAN Energy Solutions, "Alternative fuels for your twostroke powered vessel, Ammonia, methanol and methane in focus", ~ (2024)
- WinGD, "GTD – General Technical Data for WinGD 2-Stroke Engines", ~ (2024)
- MAN Diesel & Turbo, "Propulsion of VLCC", ~ (2016)
- "ABS Requirement for Ammonia Fueled Vessels", ~ (2023)
- "Aspen HYSYS v.10 user guide", ~
- A. Sunny, "Syngas production from regasified liquefied natural gas and its simulation using Aspen HYSYS", Journal of Natural Gas Science and Engineering, 30, pp.176~181 (2016)
- Kh. Mejbri, "Modelling of the thermodynamic properties of the water–ammonia mixture by three different approaches", International Journal of Refrigeration, 29(2) (2006)
- M. Wang, "Assessment of vapor–liquid equilibrium models for ionic liquid based working pairs in absorption cycles", International Journal of Refrigeration, 87, pp.10~25 (2018)
- R. Elyas, "Chemical Engineering Process Simulation", pp.309~341 (2023), Elsevier