| As the energy crisis is becoming more and more severe, the price of fuel oil is fluctuating, otherwise some conventions and regulations enforced, a steady increasing attention is put on the property of energy conservation and emission reduction. The ship power system consists of many equipments. Different propulsion types are from different equipments, such as mode of main engine, shaft generator and propeller. So, different design schemes are made. The technical and economic performance of power system are influenced by the results of selection directly. So the reasonable and effective power configuration is very important.The article main contains four part based on literature analysis, conbining selection of power plant of "Cui Zhu Lun".(1) The selection of main engine is calculated primarily according to the characteristic of course, speed and parameters of ro-ro ship.(2) This paper researches in the selection of ship main engine, and the fuzzy hierarchy comprehensive evaluation method is advised. The problem of incomplete data and produce the computational difficulties during the selection process of main engine can be solved by establishing the assessment model of the main engine selection, which integrates the advantages of the fuzzy comprehensive evaluation method and AHP evaluation model. The method is convenient, with high efficiency, and it’s easy for shipping enterprises to master, and also can provide theoretical reference for the design of similar ships.(3) Refering to the related literatures, the "ideal motor model" is established firstly, then mathematical model of shaft generator is obtained through circuit theory, which will serve as a base for the selection of ship power system.(4) The mathematical model of thrust is established based on the operating characteristics of the controllable pitch propeller, which will make the control of the thrust of propeller more accurate, and considering the ship propulsion system and working conditions in the process of navigation. |
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