Optimization Design Of Waste Heat Utilizing System Of Diesel Main Propulsion Power Vessel

On the diesel engine main propulsion power installation vessel, the exhaust of main propulsion diesel engine(Main Engine) and the cylinder cooling water of the main engine and the auxiliary machinery, all containing the heat that can be used further, these heats is the waste heat of diesel engine main propulsion power installation that this paper indicates. The waste heat of diesel engine main propulsion power installation vessel is also been a kind of heat energy that can be used , Utilizing waste heat fully and reasonably is a important step raising hot utilization rate and saving energy source. Increasingly tense today in energy source, excavate the potential of ship waste heat to achieve the research of purpose of ship saving energy , significance is great.Now, the varied system of utilization of waste heat has gotten extensive application on diesel engine main propulsion power installation vessel, but, it is not all the system of utilization of waste heat that already applies utilizes fully the potential energy carried in waste heat. Early method that study and research the potential of saving energy and direction and appraise efficient utilization of energy through studying and researching of energy adopted the analysis method of hot balance, this method is not actually overall, it make people produce misunderstanding easily; Now, the energy analysis method that people adopt more is the Exergy analysis method, only this method can reveal the insufficiency of course , and can reflect where produce the loss and loss amount, what waste heat can be recovered as well as how way recovery, so, show clearly direction for raising circulating economy and using waste heat reasonably.This paper uses the Exergy analysis method, elaborate the quality concept of energy, and analyze the course of hot power system and the vessel waste heat recovery generator system with Exergy analysis method ; Through overall introduction of the utilization system of waste heat of the diesel engine main propulsion power installation vessel, analyzing and comparing 5 kinds of typical hot line drawing of the waste heat recovery generator system, and then expounding thebasic method of simulation analysis and optimization analysis for the vessel utilization of waste heat system. In each composition parts of the utilization system of waste heat of the diesel engine main propulsion power installation vessel, the proportion of the Energy loss of the waste boiler is biggest, so this paper final selects the maximum Exergy efficiency as objective function to carry out optimization calculation and analysis against the waste boiler of a actually ship waste heat recovery system.The conclusion that this paper studies shows it is necessary for waste heat system to carry out optimization design, and only through optimization design, then can get the effect of utilization of waste heat of more economy. Still showing at the same time: Carrying out optimization against different objective function, the gotten effect will be not the same. We can optimize against the Energy efficiency and the electric power of the entire system of utilization of waste heat, and also optimize against the economy of the entire system of utilization of waste heat. The gotten effect is different, but method is same, all can reach certain benefit.