一种挖泥船最小能耗工作点计算选取方法

Method for calculating and selecting minimum specific energy consumption working point of dredger

[目的]为了解决挖泥船短排距工况下高能耗的问题,提出一种最小能耗工作点的计算选取方法。[方法]基于前期研究建立的泥泵排压、管道阻力、关键流速和泥泵汽蚀等相关模型,以单方能耗最小为目标,采用施工人员最为熟知并方便控制的泥泵转速为优化变量,运用输送系统最佳流速搜索和多泥泵转速优化相结合的双重优化方法,实现挖泥船多个泵串联最小能耗工作点的计算选取,并以配置有3台不同型号离心泵的“新海狼”号挖泥船在特定工况条件下施工为案例进行算法验证。[结果]结果显示,经所提算法模型优化后的工作点单方能耗比最大产量工作点的单方能耗降低了11.8%。[结论]研究成果的应用能有效弥补已有以施工能力(最大产量)为目标的优化施工方法,为疏浚工程的节能减排工作提供参考。

[Objective]A method for calculating and selecting the minimum specific energy consumption working point is developed to solve the problem of high energy consumption in the short-distance slurry transport of dredgers.[Methods]Based on the relevant models of pump pressure,pipeline resistance,critical flow velocity and pump cavitation established in previous research,the minimum energy consumption per cubic meter of particles is taken as the goal,and the pump speed which is most familiar and easily controlled by the workers is taken as the optimization variable.A double optimization method combining the minimum energy consumption search of the transport system and the optimization of multiple pump speeds is adopted to calculate and select the minimum energy consumption working point of the dredger with multiple pumps in a series,and the algorithm is verified by taking the construction of the"Xin Hai Lang"dredger with three different types of centrifugal pumps under specific working conditions as a case.[Results]The calculation results show that the specific-energy consumption of the working point optimized by this algorithm model is 11.8%lower than that of the maximum production working point.[Conclusions]The application of these research results can effectively make up for existing optimization methods that aim at production capacity(max.production),providing feasible references for energy saving and emission reduction in dredging projects.