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

D.G. Trodden, M.D. Woodward, M. Atlar

Research output: Contribution to journalArticle

4 Citations (Scopus)
25 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)346-356
Number of pages11
JournalOcean Engineering
Volume123
Early online date26 Jul 2016
DOIs
Publication statusPublished - 1 Sep 2016

Keywords

  • simulation
  • optimisation
  • design-point
  • unsteady flow
  • propeller modelling
  • manoeuvering

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