Abstract

The aim of this study is to evaluate the fuel efficiency of a small domestic container ship during rough sea voyages by analyzing onboard measured data. First, variations in the engine parameters, ship motion, ship speed, and wave conditions were analyzed, and several cases of rough sea voyages were extracted. Statistical analyses were conducted to determine correlations between these parameters. Second, the engine parameters, vertical acceleration, and amount of fuel flow were analyzed as the one-minute statistical value for several hours around the peak of rough weather to evaluate the fluctuation in fuel efficiency under rough sea conditions. Fuel efficiency has a strong relationship with vertical acceleration. Finally, it was shown that the amount of fuel injection could increase at the bow quartering sea compared to that in the oblique sea.

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