Effects of adverse sea conditions on propulsion and manoeuvring performance of low-powered ocean-going cargo ship

Journal article (2022)

Authors

Congbiao Sui Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering , Harbin Engineering University
P. de Vos Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering
J.J. Hopman Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering
K. Visser Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering
D. Stapersma Ship Design, Production and Operations - Mechanical, Maritime and Materials Engineering
Yu Ding Harbin Engineering University
Research Group
Ship Design, Production and Operations (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 Congbiao Sui, P. de Vos, J.J. Hopman, K. Visser, D. Stapersma, Yu Ding
DOI: https://doi.org/10.1016/j.oceaneng.2022.111348
Engine dynamic performance Adverse sea Low-powered ship Minimum propulsion power Ship operational safety
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Published Date

2022

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Ship Design, Production and Operations

Abstract

Current EEDI (Energy Efficiency Design Index) regulations striving to reduce the installed engine power on new ships for a low EEDI may lead to underpowered ships having insufficient power when operating in adverse sea conditions. In this paper, the operational safety of a low-powered ocean-going cargo ship operating in adverse sea conditions has been investigated using an integrated ship propulsion, manoeuvring and sea state model. The ship propulsion and manoeuvring performance, especially the dynamic engine behaviour, when the ship is sailing in heavy weather and turning into head sea, have been studied. According to the results, the dynamic engine behaviour should be considered when assessing the ship operational safety, as the static engine operating envelope is inadequate for the safety assessment. The impact of PTO/PTI (power-take-off/in) operation and changing propeller pitch on the ship thrust availability in adverse sea conditions have also been investigated. To protect the engine from mechanical and thermal overloading, compressor surge and over-speeding during dynamic ship operations and/or in high sea states, the engine and propeller should be carefully controlled. The paper shows that if in (heavy) adverse weather the propeller pitch can be reduced or if the shaft generator can work as a motor (PTI), more thrust can be developed which can significantly improve the operational safety of the ship.