Fuel costs are the sigle most important driver of marginal costs for commercial marine transportation and account for almost 50% of total voyage costs for typical configurations. Hence, there has developed a desire among operators and manufacturers of all classes of ships to embrace innovative ways to reduce the demand for fuels. This research investigates the fuel consumption of a standard container ship architecture based on different scenarios of operation. The approach is to first model fuel consumption from the main propulsion engines and the auxiliary engines based on standard propulsion modes, with a configuration known as a Power Take Off (PTO) system. These preliminary results are then analyzed to identify opportunities for retrofitting this configuration by utilizing the same engine combination, but augmenting the PTO system into a modernized shaft motor-generator system, or Auxiliary Power System (APS). The APS enables electrification, which can potentially decrease system fuel consumption. Lastly, the potential for these fuel savings is evaluated for multiple scales of the APS.

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