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

3 Citations (Scopus)

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.
LanguageEnglish
Pages346-356
Number of pages11
JournalOcean Engineering
Volume123
Early online date26 Jul 2016
DOIs
Publication statusPublished - 1 Sep 2016

Fingerprint

Propellers
Ships
Carbon dioxide
Water
Containers

Keywords

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

Cite this

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title = "Accounting for ship manoeuvring motion during propeller selection to reduce CO2 emissions",
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.",
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author = "D.G. Trodden and M.D. Woodward and M. Atlar",
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Accounting for ship manoeuvring motion during propeller selection to reduce CO2 emissions. / Trodden, D.G.; Woodward, M.D.; Atlar, M.

In: Ocean Engineering, Vol. 123, 01.09.2016, p. 346-356.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Accounting for ship manoeuvring motion during propeller selection to reduce CO2 emissions

AU - Trodden, D.G.

AU - Woodward, M.D.

AU - Atlar, M.

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N2 - 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.

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KW - simulation

KW - optimisation

KW - design-point

KW - unsteady flow

KW - propeller modelling

KW - manoeuvering

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