A TOpti simulation for finding fuel saving by optimising propulsion control and power management

Miikka Jaurola, Anders Hedin, Seppo Tikkanen, Kalevi Huhtala

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
13 Downloads (Pure)


The optimisation of load shares between parallel power sources is essential for fuel-efficient propulsion systems. A more complete power management problem can be formulated by including the propeller and its propulsion control. Not only does this allow for a reduction in the propeller load under the changing operating conditions of the vessel, but also it enables the minimisation of the machinery’s fuel consumption at load- and speed-dependent efficiency models. The need to optimise the design of the machinery in marine vessels has motivated the authors of the current article to develop a design tool for this purpose. The present case study gives an overview of the tool’s features and compares the optimal power management of a fishing boat with different propulsion control variants. Compared with a controllable pitch propeller, which is operated at a fixed speed, reductions in fuel consumption were achieved with reduced propeller speeds. The best fuel savings, approximately 11%, were achieved using a two-speed gearbox with a controllable pitch propeller.

Original languageEnglish
Pages (from-to)411–425
Number of pages15
JournalJournal of Marine Science and Technology (Japan)
Issue number2
Early online date2019
Publication statusPublished - 2020
Publication typeA1 Journal article-refereed


  • Energy-efficient propulsion
  • Fishing boat
  • Numerical optimisation
  • Power management
  • Propulsion control

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Oceanography
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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