This paper presents a theoretical prediction method for the fuel oil consumption of a ship going through irregular waves, and a method of deciding economical ship speeds which minimize the quantity of fuel oil consumed by a ship crossing over an ocean. Furthermore theoretical calculations are carried out in order to evaluate the quantity of fuel saving which is achieved by navigation under economical ship speeds. Two ships are chosen for the calculation. One is a 140 000 DWT bulk carrier on a Japan to Australia route and the other is a 86 000 DWT bulk carrier on a Japan to North America route. The results of the calculations verify that the fuel oil consumed by the navigation under economical ship speeds is 2% lower in the case of the 140 000 DWT bulk carrier than that of navigation under constant engine power, and 6% lower in the case of the 86 000 DWT bulk carrier.


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    Title :

    Fuel Saving Attained by a Navigation under Economical Ship Speeds


    Contributors:
    O. Yamamoto (author)

    Publication date :

    1984


    Size :

    11 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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