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Analysis of Hull Shape Impact on Energy Consumption in an Electric Port Tugboat

Author

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  • Wojciech Koznowski

    (Department of Ship Automation, Gdynia Maritime University, Morska St. 83, 81-225 Gdynia, Poland)

  • Andrzej Łebkowski

    (Department of Ship Automation, Gdynia Maritime University, Morska St. 83, 81-225 Gdynia, Poland)

Abstract

The trend to replace internal combustion engines with electric zero-emission drives, visible in the automotive industry, also exists in the shipbuilding industry. In contrary to land vehicles, the requirements for the electric propulsion system of tugs are much greater, which combined with the limited space and energy on board, makes any amount of energy valuable. Strategic changes in the policy of many countries, such as the “Fit for 55” package, introduce plans to significantly reduce CO 2 emissions, which favors the development of alternative drives and their introduction to new areas of operation. This article presents that it is possible to reduce the amount of energy an electric tug spends for movement by applying the Particle Swarm Optimization method to modify the shape of its hull. A statistical analysis of public data was performed to determine the speed profiles of actual port tugs. The Van Oortmerssen method was used to determine the hull resistances of the proposed tug and the impact of the hull shape modification sets on reducing these resistances. Based on the six obtained speed profiles, it was determined that one of the tested variants of modifications made it possible to reduce energy consumption on average by 2.12%, to even 3.87% for one of the profiles, and that some modifications increase energy consumption by even 6.59%.

Suggested Citation

  • Wojciech Koznowski & Andrzej Łebkowski, 2022. "Analysis of Hull Shape Impact on Energy Consumption in an Electric Port Tugboat," Energies, MDPI, vol. 15(1), pages 1-21, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:1:p:339-:d:717553
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    References listed on IDEAS

    as
    1. Magdalena Kunicka & Wojciech Litwin, 2019. "Energy Demand of Short-Range Inland Ferry with Series Hybrid Propulsion Depending on the Navigation Strategy," Energies, MDPI, vol. 12(18), pages 1-13, September.
    2. Jan Iwaszkiewicz & Adam Muc, 2020. "State and Space Vectors of the 5-Phase 2 -Level VSI," Energies, MDPI, vol. 13(17), pages 1-22, August.
    3. Sławomir Karyś & Paweł Stawczyk, 2021. "Cost-Effective Power Converters for Small Wind Turbines," Energies, MDPI, vol. 14(18), pages 1-14, September.
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