The Study Of Optimal Configuration And Operation Analysis Of Vessel's Combined Cooling Heating And Power System

With the continuous rise of vessel fuel prices,the increasing shortage of vessel fuel resources,the requirements of vessel energy efficiency and vessel pollutant emissions standards are becoming more and more stringent.It is one of the inevitable problems in the development of vessel industry to optimize the vessel energy system reasonably,so as to improve the economic benefits and environmental benefits of the vessel.This paper is aimed at the shortage of the research on the current combined heating,cooling and power system of vessel,the optimal configuration and operation optimization of the combined cooling,heating and power system of vessel is studied and analyzed.Firstly,the mathematical model of the main equipment of vessel's combined cooling,heating and power system including power device,heating device,cooling device,energy storage device and flue gas treatment device is established.Secondly,the optimal configuration model of the vessel's combined cooling,heating and power system which based on the constant efficiency model of the main equipment is presented.Thirdly,the operation optimization model of the vessel's combined cooling,heating and power system based on the partial load model of the main equipment is constructed.Finally,the operation optimization model of the vessel's combined cooling,heating and power system that takes into account the load shifting is constructed.Aiming at the problem of the optimal configuration of the vessel's combined cooling,heating and power system,the economical criteria,the system's space occupation criteria,and the multi-objective criteria corresponding to the optimized configuration of of the vessel's combined cooling,heating and power system were obtained.The results show that: compared to the reference system,the optimal configuration of the vessel 's combined cooling,heating and power supply system based on the economic criteria optimization results reduce the annual operating cost by 14.45%;compared to the reference system,the optimal configuration of the ship 's combined cooling,heating and power supply system based on the system's space occupation criteria optimization results reduce the occupied space by 9.68%;compared to the reference system,the optimal configuration of the ship 's combined cooling,heating and power supply system based on the multi-objective criteria optimization results reduce the annual operating cost by 14.33% and the occupied space by 7.29%,respectively.Aiming at the operation optimization of the vessel's combined cooling,heating and power system,the economic optimal operation strategy,energy efficiency optimal operation strategy and environmental optimal operation strategy under different seasons are obtained,then are compared and analyzed;then the AHP method was used to determine the best operating strategy in different seasons.Finally,the sensitivity of the vessel's combined heating,cooling and power system to different fuel prices was analyzed.The results show that the economically optimal operation strategy is the optimal operation strategy of the vessel's cooling,heating power system under different seasons,The economy of vessel's heating,cooling and power system is more sensitive to the change of MGO fuel price,and the sensitivity decrease with the decrease of demand side thermo-electric ratio.Aiming at the problem of the operation optimization model of the vessel's combined cooling,heating and power system accounting the load shifting model,the load shifting model about cooling,heating,and electricity is constructed and converted it into the operation optimization model of the vessel's combined cooling,heating,and power system,then obtained the optimization operation strategy under economic criteria.The results show that the economic benefits,energy efficiency and environmental benefits of the vessel's combined cooling,heating and power system can be improved after load shifting in different seasons under economic criteria.