船舶能效营运指数预测的建模及仿真分析

摘要

为了研究船舶能量消耗的组成和EEOI的预测问题，以主机油耗作为研究重点，建立了船舶能效营运指数（ ehip energy efficiency operational indicator， EEOI）分析预测仿真模型。建立了推进系统－船体运动－环境的联合数学模型，对船舶运动及推进系统状态进行迭代计算。采用欧洲中期天气预报中心（ European Centre for Medium⁃Range Weather Forecasts， ECMWF）的气象数据，结合目标船的设计、实验参数及航线进行了仿真。根据对目标船在不同转速、不同航线的EEOI进行仿真，结果表明：不同主机转速对推进系统的能量消耗组成有显著影响。模型能够对不同转速的时间及EEOI进行预测，为航速设计提供依据；同时还能对不同航线的EEOI进行对比，为基于能效的航线优化提供了研究基础。%To study the composition of a ship′s energy consumption and to establish an energy efficiency operational index ( EEOI) , we developed a simulation model with respect to the main engine’ s fuel consumption. In the pro⁃posed mathematical model, we combined the propulsion system⁃ship motion⁃sailing environment to iteratively com⁃pute the state of the ship motion and propulsion system. This simulation was based on the target ship`s design and experimental parameters and the route, using weather data from the European Centre for Medium⁃Range Weather Forecasts ( ECMWF) . The EEOI simulation result for different engine speeds and routes shows that differences in the main engine’ s speed exerts a significant influence on the propulsion system’ s energy consumption. This model can predict navigation time and uses the EEOI for different engine speeds to provide a basis for speed design. In ad⁃dition, the model shows how the EEOI values vary with the route, laying the foundation for route optimization based on ship energy efficiency.