Searching for a new eco-friendly marine fuel has become necessary to eliminate the adverse effects arising from ships’ emissions. The current paper investigates using blue/green ammonia as a marine alternative fuel from environmental and economic points of view. A new RO/RO vessel under construction is investigated as a case study. Three propulsion systems are considered: heavy fuel diesel engine, blue/green ammonia diesel engine and blue/green solid oxide fuel cell (SOFC). Environmentally, SOFC green ammonia-fueled ship is the best selection with NO_x and greenhouse gas (GHG) emissions’ reduction of 93.4% and 92% compared with the traditional propulsion system. Economically, SOFC blue ammonia-fueled ship will be the best selection with total ship saving cost of 5.71% and annual levelized cost of energy 0.19 $/kWh. Finally, SOFC green ammonia-fueled ship proposes to be eco-friendly with cost effectiveness of 172.92 $/ton-emissions as a step forward to achieve IMO 2030 strategy.

寻找一种新的环保船用燃料已成为消除船舶 排放产生的不利影响的必要条件。当前的论文从环境和经济的角度研究了使用蓝/绿氨作为海洋替代燃料。作为案例研究，研究了一艘正在建造的新 RO/RO 船。考虑了三种推进系统：重燃料柴油发动机、蓝/绿氨柴油发动机和蓝/绿固体氧化物燃料电池 (SOFC)。在环保方面，SOFC绿色氨燃料船舶是最佳选择，与传统推进系统相比，氮氧化物_和温室气体（GHG）排放量分别减少93.4%和92%。经济上，SOFC蓝氨燃料船将是最佳选择，船舶总成本节约5.71%， 年度平准化能源成本 0.19 美元/千瓦时。最后，SOFC 绿色氨燃料船提出生态友好，成本效益为 172.92 美元/吨排放量，作为实现 IMO 2030 战略的一步。