Affiliation:
1. Department of Naval Architecture and Ocean Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
Abstract
Due to tightening regulations on exhaust emissions from ships, there is a growing need to develop electric or hybrid electric propulsion systems to replace conventional diesel-based ship power systems. The hybrid electric propulsion system is suitable for small and medium-sized vessels and its energy efficiency significantly depends on the arrangement of different power sources, power control strategies for energy sources, and energy storage system (ESS). Therefore, an analytical simulation to evaluate the energy efficiency of ships with their structure and control strategies is needed. In this study, a back–forward approach-based efficiency performance analysis model was developed using the Holtrop–Mennen resistance model to calculate ship resistance and power demand based on a given ship’s speed profiles. This model has the advantages of using easily obtainable ship speed profiles as the input and can be modularized for each power source and ESS, incorporating mechanical performance limitations, and allows for rapid analysis. The developed analytical model was applied to a hybrid electric propulsion system in a marine support vessel and its energy efficiency was evaluated by establishing rule-based power control strategies. As a result, the engine efficiency of the hybrid electric propulsion system increased from about 27% to 30% compared to the existing system, and the final effect of reducing fuel consumption by about 10% compared to the existing system was confirmed through the developed simulator. In the future, this analytical model could be utilized to derive the optimal layout of hybrid electric propulsion systems, and to formulate power control strategies.
Funder
National Research Foundation of Korea
Korea Institute for Advancement of Technology
Subject
Ocean Engineering,Water Science and Technology,Civil and Structural Engineering
Reference36 articles.
1. Faber, S., Hanayama, S., and Zhang, S. (2020). Fourth IMO GHG Study 2020-Fianl Report, International Maritime Organization (IMO).
2. International Maritime Organization (2018). Initial IMO Strategy on Reduction of GHG Emissions from Ships, International Maritime Organization.
3. Novel technologies and strategies for clean transport systems;Roskilly;Appl. Energy,2015
4. Hybrid power and propusion systems for ship: Current status and future challenges;Inal;Renew. Sustain. Energy Rev.,2022
5. Hou, J. (2017). Control and Optimization of Electric Ship Propulsion Systems with Hybrid Energy Storage. [Ph.D. Dissertation, University of Michigan].