隨著氣候變遷日漸加劇，為使環境永續發展，各國積極推動節約能源與減少二氧化碳淨排放量措施，從運輸角度，發展綠色運輸為重要策略之一，其中，海洋占地球表面積約四分之三，因此發展綠色航運將有助於降低環境污染。
綠色運具為綠色航運其中一項措施，例如：發展電動船舶，電動船舶現依其推進及動力類型可分為電池推進、電力推進、混合動力及大型電力推進四類；本論文以現有電池設備及船舶，透過模式建立，分別以各噸位船舶依航行距離10海浬、25海浬、80海浬及350海浬進行可行性評估分析。
透過船舶航行能量需求模式與電池能量供給模式建立電動船舶可行性評估分析，並考量船舶航行風險及續航力，當電動船舶航行10海浬距離範圍時，可行性評估準則K值須等於或大於1.5；船舶航行25海浬距離時，電動船舶可行性評估準則K值須等於或大於2；當船舶航行80海浬時，可行性評估準則K值須等於或大於2.5；最後，當船舶航行350海浬時，電動船舶可行性評估準則K值須等於或大於3.5；若無法符合電動船舶可行性評估準則之船舶，建議可依實際使用需求，發展以增加發電機或相關設備之電動船舶。
本研究電動船舶可行性評估分析結果，符合古典力學概念；本研究的結論，應可提供船舶需求者、製造者或相關業者設計新造或改造船舶之參考。

關鍵字：電動船舶、船舶航行能量、電池供給能量、可行性評估

As climate change intensifies, energy consumptions and carbon dioxide emissions need to be carefully controlled for sustainable development. From the perspective of transportation, the promotion of green shipping is a primary issue. Green transportation, such as electric ship, is a kind of the most popular vessels for green shipping. Nowadays, electric ships can be divided into battery propulsion, power propulsion, hybrid power, and large power propulsion. This study mainly discusses the feasibility of developing electric ships with battery propulsion.
To analyze the feasibility of electric ships, we propose an assessment index K, which is defined as the ratio of energy supply from battery to energy consumption by driving a ship. We also take the sailing distance into consideration to measure the K value. There are four distances in this study, 10, 25, 80, and 350 nautical miles.
When a ship needs to sail for 10 nautical miles, the K value must be equal to or greater than 1.5. The feasibility assessment K value must be equal to or greater than 2 when the sailing distance is 25 nautical miles. For sailing distance of 80 nautical miles, the feasibility assessment K value must be equal to or greater than 2.5. When sailing distance beyond 350 nautical miles, the feasibility assessment K value must be equal to or greater than 3.5. If a ship meets the above requirements of K value, the ship can be built in battery propulsion form. The proposed feasibility assessment analysis of electric ships is based on the fundamentals of classical mechanics. The conclusions of this study can be applied to the design or remodeling of ships for sustainable transportation.

Keywords: electric ship, energy demand, energy supply, assessment

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