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Accounting for ship manoeuvring motion during propeller selection to reduce CO2 emissions

Lookup NU author(s): Dr David Trodden, Dr Michael Woodward, Professor Mehmet Atlar

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

The aim of this research is to reduce Carbon Dioxide emission through enhanced propeller selection achieved by a more realistic identification of the true propeller operating point. By recognising that the ‘dead-ahead steady speed in flat calm water’ condition is not representative of the true operation of a ship in a seaway, a new paradigm is proposed. By taking into consideration the effects of wind and waves on the ship's true speed through the water and thus the probable load condition of the propeller, throughout the ship's mission, a probable propeller operating condition is identified. Propellers are then selected for both the original condition and the adapted condition, and their performance compared using time-domain mission simulations. The objective of the study is to demonstrate how the alternative propeller selection methodologies proposed, can on average provide greater overall efficiency.Results from the case studies are encouraging, with a gain of 2.34% in open water propeller efficiency for a 3600 Twenty foot Equivalent Unit container ship, equating to a saving of 3.22% in Carbon Dioxide emissions.


Publication metadata

Author(s): Trodden DG, Woodward MD, Atlar M

Publication type: Article

Journal: Ocean Engineering

Year: 2016

Volume: 123

Pages: 346-356

Online publication date: 26/07/2016

Acceptance date: 06/07/2016

Print publication date: 01/09/2016

ISSN (print): 0029-8018

ISSN (electronic): 1873-5258

Publisher: Pergamon Press

URL: http://dx.doi.org/10.1016/j.oceaneng.2016.07.002

DOI: 10.1016/j.oceaneng.2016.07.002c


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