Affiliation:
1. School of Naval Architecture and Marine Engineering, National Technical University of Athens, 15780 Athens, Greece
Abstract
Route planning procedures for ocean-going vessels depend significantly on prevailing weather conditions, the ship’s design characteristics and the current operational state of the vessel. The operational status considers hull and propeller fouling, which significantly affects fuel oil consumption coupled with route selection. The current paper examines the effect of the fouling level on the selection of the optimized route compared with the clean hull/propeller as well as the orthodrome/loxodrome route. A developed weather routing tool is utilized, which is based on a physics-based model for the calculation of the main engine’s fuel oil consumption enriched to account for different fouling levels of the hull and the propeller. A genetic algorithm is employed to solve the optimization problem. A case regarding a containership in trans-Atlantic transit using forecasted weather data is presented. The effect of ocean currents is also examined as it was derived that they greatly affect route selection, revealing a strong dependence on the level of fouling. Ignoring the fouling impact can result in miscalculations regarding the estimated fuel oil consumption for a transit. Similarly, when ocean currents are ignored in the route planning process, the resulting optimal paths do not ensure energy saving.
Subject
Ocean Engineering,Water Science and Technology,Civil and Structural Engineering
Reference27 articles.
1. IMO (2018). Initial IMO Strategy on Reduction of GHG Emissions from Ships, International Maritime Organisation. Resolution MEPC.304 (72).
2. State-of-the-art technologies, measures and potential reducing GHG emissions from shipping—A review;Bouman;Transp. Res. Part D,2017
3. Tadros, M., Vettor, R., Ventura, M., and Soares, C.G. (2022). Assessment of ship fuel consumption for different hull roughness in realistic weather conditions. J. Mar. Sci. Eng., 10.
4. On the effect of biofouling on the minimum propulsion power of ships for safe navigation in realistic conditions;Liu;J. Bioadhesion Biofilm Res.,2021
5. IMO (2013). Interim Guidelines for Determining Minimum Propulsion Power to Maintain the Maneuverability in Adverse Conditions, International Maritime Organisation. Resolution MEPC.232 (65).