Abstract: With the green and low carbon transformation of the shipping industry, the importance of the low carbon fuel is gradually emerging. As there is no carbon dioxide emission from ammonia and hydrogen combustion, ammonia and hydrogen are regarded as the promising zero-carbon fuels for shipping. The total cost of the ownership (TCO) models of the ammonia and hydrogen powered ship and the traditional fuel powered ship are established to quantitatively compare the relevant economy and clarify the main influencing factors. The results show that the fuel price is the main factor affecting the economy of ships. The TCO of the ammonia and hydrogen powered ships is about twice that of the traditional fuel powered ships under the current fuel price. The low energy density of the alternative fuels is the main reason that causes this difference. The cost of the alternative fuels will be an important factor in the low carbon transformation of shipping. And the cost reduction of the alternative fuels deserves attention.

Key words: green ship, low carbon, fuel, cost, economy

摘要： 随着航运业绿色低碳转型,低碳燃料的重要性逐渐显现,氨和氢燃烧无二氧化碳排放,被看作很有前景的零碳航运燃料。该文通过建立氨、氢动力船舶和传统燃油动力船舶总拥有成本（TCO）模型,量化对比相关经济性,并明确主要影响要素。结果显示：燃料价格是影响船舶经济性的主要因素;当前燃料价格水平下,氨、氢动力船舶的TCO约是传统燃油动力船的2倍,替代燃料的低能量密度是造成这一差异的主要原因。替代燃料成本将会是航运低碳转型的重要影响因素之一,替代燃料的降本增效值得关注。

关键词: 绿色船舶, 低碳, 燃料, 成本, 经济性