A Study of Fuel Consumption Model Using Tugboat’s Propulsion System

抄録

This paper proposes a new hybrid propulsion system without large-capacity battery and clarifies its characteristics. This proposed system has main engines and diesel generators as power sources. These are connected through the electric power converters and the motor generators. To evaluate the propulsion system, a fuel consumption simulation has been developed. The simulation includes the efficiency data of all apparatus which comprise the propulsion system. The efficiency data varies depending on the load factor and rating of the apparatus. Considering all possible energy flows, the most efficient energy flow and power balance are determined. This simulation was evaluated using a tugboat's propulsion system as a model. In this paper, the characteristics of the fuel consumption model are described as the core unit in the simulation. An efficiency improvement of more than a few percent is expected when the power demand is low.