The renewable energy capture for a ship’s propulsion system was optimised for a combination of wind sail and solar power using two models. The first model optimised the rigid wind sail angle under varying wind conditions, while the second model optimised the available deck area of the ship assigned to wind and solar systems to maximise total power production. The optimum power obtained from the results was used in the Energy Efficiency Design Index calculation to evaluate the carbon dioxide emission reduction per unit transport work. In a case study using a bulk carrier vessel, the results showed that sailing at optimal sail angle and optimising the available deck area with combined installation of solar and wind system allowed maximising the renewable power to contribute 36% reduction of carbon dioxide emissions compared to the same ship without innovative technologies. It was concluded that if the ship speed was reduced to 56% of its original speed, the ship could sail on renewable energy captured on-board only. The developed methodology can be employed during both ship design and operation stages as an assessment tool, not only for bulk carriers but also other types of vessels with an appropriate tailoring.

船舶推进系统的可再生能源捕获使用两种模型针对风帆和太阳能的组合进行了优化。第一个模型优化了不同风力条件下的刚性风帆角度，而第二个模型优化了分配给风能和太阳能系统的船舶可用甲板面积，以最大限度地提高总发电量。从结果中获得的最佳功率用于能源效率设计指数计算，以评估每单位运输工作的二氧化碳减排量。在使用散货船的案例研究中，结果表明，与没有创新技术的同一艘船相比，以最佳航行角度航行并优化可用甲板面积并结合安装太阳能和风能系统，可以最大限度地利用可再生能源，从而减少 36% 的二氧化碳排放量。得出的结论是，如果船速降低到原来速度的 56%，则该船只能依靠船上捕获的可再生能源航行。开发的方法可以在船舶设计和运营阶段用作评估工具，不仅适用于散货船，还适用于其他类型的船舶，具有适当的剪裁。