Research On Selection Of The Main Power Plant For 2500TEU Container Ships Based On EEDI

In the past ten years,with the development of the economy and the improvement of living standards,people's awareness of environmental protection and the requirements for a better environment improved increasingly.Reducing greenhouse gas emissions and building an environmentally friendly and harmonious society have become the goal of people's development.In order to control the greenhouse gas emissions generated by ships,the international maritime organization(IMO)adopted the energy efficiency design index(EEDI)for controlling greenhouse gas emissions at the 62nd Meeting in July,2011.This standard has been mandatorily taken effect since 2013.The main power plant is the core device of the ship system and is closely related to EEDI of ships.Therefore,it is of great significance to select the issue of optimizing the selection of the main power plant of the ship.According to the definition of EEDI,the factors affecting ship EEDI can be roughly divided into fuel consumption,load capacity,speed,clean energy use rate,energy utilization efficiency and so on.This paper studies the fuel consumption of the main engine and the performance optimization of the propeller to reduce the EEDI value of the ship.This paper first introduces the actual background of the research,and briefly introduces the selection of main engine and propeller research in the world,and puts forward the research content and significance of this paper in view of the problems in the past research.Secondly,the basic definition,calculation and reference line of EEDI are introduced,and the basic theory of ship main power unit selection is analyzed.Thirdly,the paper analyzes the impact of design speed,EEDI and overall life cycle cost on main engine selection of a ship.Thirdly,based on the theoretical analysis results,this paper applies computational fluid dynamics(CFD)to numerical simulation of ship's navigational resistance,propeller's open water characteristics,and hull-propeller interference.The results verify the effectiveness of the CFD method.Finally,based on the above theoretical and numerical results,the main engine-propeller matching design of the selected inland container ship is carried out,and the EEDI value of the design scheme is evaluated to determine the best selection scheme of the container ship that meets the EEDI requirements.Through the research of this thesis,an effective scheme based on EEDI for the selection of the main power plant of the selected container ship is proposed,which provides a reference for the ship designer and constructor to reduce the EEDI value of the ship.The proposed scheme firstly applies CFD to obtain the navigating resistance of ship and characteristics of propeller by numerical simulation.Based on these numerical simulation results,several selections of main engine-propeller matching design are proposed.Then EEDI is used to evaluate these design selections,and the optimal design scheme in accordance with EEDI requirements is determined.