This study proposes a novel Energy Efficiency Design Index (EEDI) estimation method considering the Onboard Carbon Capture and Storage (OCCS) system. The OCCS selectively captures and stores carbon dioxide (CO₂) contained in exhaust gas emitted from the internal combustion engines of a ship. It also utilizes a CO₂ capture process, a CO₂ liquefaction process, and a CO₂ storage tank. The status of greenhouse gas regulation for ships currently being discussed at the International Maritime Organization was investigated, and a modified EEDI estimation formula and a method for EEDI calculation considering the OCCS were evaluated. Case studies on a container feeder were conducted based on the proposed method in accordance with the EEDI regulations. The chemical absorption with an activated methyldiethanolamine solution was selected for the CO₂ capture process. The captured CO₂ was liquefied using cold energy from liquefied natural gas and ammonia. To improve the volume efficiency of the containment system, a prismatic pressure vessel was adopted for the CO₂ storage tank. The results demonstrate that the required carbon capture ratio in the CO₂ capture process is higher than the actual EEDI reduction rate.

这项研究提出了一种新的能源效率设计指数（EEDI）估算方法，该方法考虑了车载碳捕集与封存（OCCS）系统。OCCS选择性地捕获并存储从船舶的内燃机排放的废气中所包含的二氧化碳（CO ₂）。它还利用了CO ₂捕获过程，CO ₂液化过程和CO ₂储存罐。研究了国际海事组织目前正在讨论的船舶温室气体监管状况，并评估了修正的EEDI估算公式和考虑OCCS的EEDI计算方法。根据建议的方法，根据EEDI规定，对集装箱给料机进行了案例研究。选择了用活化的甲基二乙醇胺溶液进行的化学吸收，用于CO ₂捕集过程。使用来自液化天然气和氨的冷能将捕获的CO ₂液化。为了提高安全壳系统的容积效率，CO ₂采用了棱柱形压力容器储存罐。结果表明，CO ₂捕集过程中所需的碳捕集率高于实际的EEDI降低率。