engleski

Impact of slow steaming on the fuel consumption of a container ship

Slow steaming approach refers to a significant reduction in ship speed, nowadays commonly applied in cargo shipping. This approach is very important from both an economic and environmental point of view, since it can lead to significant savings in the fuel consumption. However, it should be noted that in slow steaming, the ship operates in different conditions than the ones for which is designed. Also, it increases the voyage time and therefore reduces the number of voyages per year. During the sail, ship encounters different sea states on its route and the total resistance can be significantly increased due to the added resistance in waves, especially at heavier sea states. The added resistance in waves is one of the main causes of an increase in the fuel consumption. The total resistance of a container ship at different sea states is calculated utilizing the Computational Fluid Dynamics (CFD) based on the viscous and potential flow theory. In this paper, the savings in the fuel consumption due to slow steaming approach are estimated for a container ship trade route. The obtained results may give a valuable insight into the pros and cons of slow steaming approach.

calm water resistance ; added resistance ; total resistance in waves, container ship, fuel consumption ; computational fluid dynamics ; Bretschneider wave spectrum

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