With the improvement of the international community s environmental requirements, ship emissions standards are more stringent. In order to complete the exhaust gas purification work, Dafa 6DL-26 diesel engine set is u...With the improvement of the international community s environmental requirements, ship emissions standards are more stringent. In order to complete the exhaust gas purification work, Dafa 6DL-26 diesel engine set is used for simulation. Finite element multi-phase flow model and DPM model are used for numerical simulation and structural optimization of the position of dust removal tank at the desulfurization pretreatment part (Venturi segment). The results show that it can effectively optimize the flow field and reduce the power consumption of the marine diesel engine when the rightmost axis of the dust removal tank coincides with the axis of the Venturi center.展开更多
文摘With the improvement of the international community s environmental requirements, ship emissions standards are more stringent. In order to complete the exhaust gas purification work, Dafa 6DL-26 diesel engine set is used for simulation. Finite element multi-phase flow model and DPM model are used for numerical simulation and structural optimization of the position of dust removal tank at the desulfurization pretreatment part (Venturi segment). The results show that it can effectively optimize the flow field and reduce the power consumption of the marine diesel engine when the rightmost axis of the dust removal tank coincides with the axis of the Venturi center.
文摘船舶尾气排放计算模型复杂,所需数据源种类多样,计算数据量巨大,传统的单机计算程序难以满足船舶尾气排放监测的实时需求。文中基于Spark算法,设计了一种高性能、可扩展的船舶尾气排放实时计算方法。该方法首先通过Spark Streaming将离散的船舶AIS轨迹点连接成连续地轨迹段,然后通过插值生成单船尾气排放量网格,再通过Spark reduce By Key工具将船舶尾气中具有相同网格索引的各类排放物总量进行叠加合并,生成区域排放量网格数据,实现区域船舶尾气排放的实时计算,并基于GIS平台构建了深圳港船舶尾气排放实时监测平台。