A systemic analysis of alternative energy sources in the execution of ship operations in sea ice.
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School of Engineering |
Master's thesis
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en
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78
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Abstract
The global maritime industry faces an unprecedented challenge in reducing its environmental footprint, particularly in terms of greenhouse gas emissions. As a significant contributor to global CO2 emissions, the shipping sector is under increasing pressure to adopt sustainable practices and technologies. This pressure extends to specialized vessels like icebreakers, which play a crucial role in maintaining maritime operations in polar and sub-polar regions. The unique demands of operations in sea ice operations, combined with the urgent need for emissions reduction, necessitate innovative approaches to vessel propulsion and energy systems. This thesis explores the feasibility of transitioning operations in sea ice vessels from heavy fuel oil to alternative energy sources. Icebreakers, essential for winter navigation in polar and subpolar regions, are particularly energy-intensive, making them prime candidates for innovation in sustainable propulsion technologies. The study evaluates the feasibility of various alternative fuels, including liquid hydrogen, methanol, ethanol, compressed natural gas (CNG), and liquefied natural gas (LNG), for operations in sea ice operations in the Northern Baltic region. By employing resistance and power calculations based on the Finnish-Swedish Ice Class Rules, this research aims to provide a comprehensive assessment of energy requirements, fuel efficiency, and economic viability across different operational scenarios. LNG emerges as the most promising alternative fuel for operations in sea ice operations, offering a balance between efficiency, economic feasibility, and storage requirements. The research provides detailed comparisons of fuel performance across different scenarios, highlighting the trade-offs between energy density, storage volume, and cost for each alternative. The thesis concludes by discussing the implications of these findings for future ship design, fuel infrastructure development, and policy formulation, while also identifying areas for further research, including hybrid propulsion systems and more comprehensive environmental assessments.Description
Supervisor
Valdez Banda, OsirisThesis advisor
Santasalo-Aarnio, AnnukkaSuominen, Mikko