Abstract
Mean long-term service parameters of transport ship propulsion system: Part II Propulsion engine service parameters of transport ship sailing on a given shipping route During ship sailing on a given shipping route in real weather conditions all propulsion system performance parameters of the ship change along with changes of instantaneous total resistance and speed of the ship. In this paper results of calculations are presented of distribution function and mean statistical values of screw propeller thrust, rotational speed and efficiency as well as propulsion engine power output and specific fuel oil consumption occurring on selected shipping routes. On this basis new guidelines for ship propulsion system design procedure are formulated.
Highlights
During ship sailing on a given shipping route in real weather conditions all propulsion system performance parameters of the ship change along with changes of instantaneous total resistance and speed of the ship
Conclusions resulting from the calculations of mean statistical service parameters of screw propeller were presented in [10]
Results of the calculations of the mean statistical parameters of propulsion engine operation in the form of histograms are very similar to those of screw propeller as the engine in question directly drives the propeller and the calculated power output is used only for propelling the ship
Summary
During ship sailing on a given shipping route in real weather conditions all propulsion system performance parameters of the ship change along with changes of instantaneous total resistance and speed of the ship. During ship sailing on a shipping route in changeable weather conditions all the ship’s service parameters result from its engine’s working point which is to be located within the area of the engine’s load diagram (Fig. 7) characterized by engine speed and power output.
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