An Analysis on the Design and Operation of Marine Engines in Relation to Ship's Economy

Abstract

As regards the economic analysis of ships, there is always an argument as to the method of analysis to be applied and the data to be inputted.
In this paper, the author has tried to give an answer to this problem by presenting a simple and clear-cut method of analysis which is featured by the introduction of optimum conditions for the design and operation of a ship with special emphasis on those of her engine.
Results obtained are summarized as follows;
(1) There are two optimum points, i.e. profit maximum (P_max) point and transportation cost minimum (C_min) point, which are important in designing and operating a ship.
(2) Optimum conditions for P_max and C_min points of a ship are presented showing that these conditions are influenced by the fuel consumption characteristics of her engine.
(3) From the relations which define optimum conditions, the influence of economic factors such as freight rate, fuel price has been shown.
(4) By applying the same relations, several problems pertinent to the design and operation of a ship have been discussed.