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Brötje, Steffen and Mühmer, Markus and Schwedt, Thorben and Tran, Phong and Ehlers, Sören (2025) A case study of enhancing energy efficiency in battery-electric ferries through low-temperature heat pump integration. Journal of Marine Engineering & Technology. Taylor & Francis. doi: 10.1080/20464177.2025.2567723. ISSN 2046-4177.
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Official URL: https://www.tandfonline.com/doi/full/10.1080/20464177.2025.2567723
Abstract
This case study examines the potential for energy savings in all-electric battery-driven ferries through the integration of water heat pumps that utilise low-temperature waste heat for on-board heating. The principal objective is to enhance both energy efficiency and economic viability. A hybrid-driven diesel-battery-powered roll-on/roll-off passenger ferry operating in the Baltic Sea is analysed, using real-time data from power and heat flow measurements, energy flow analysis, and thermodynamic calculations. The study investigates the potential for retrofitting a 10 MWh battery system for full battery-electric operation. The findings indicate that heat pumps could satisfy over 50% of the HVAC nominal heat requirements, achieving a seasonal coefficient of performance (SCOP) of 3.5. The integration of heat pumps has the potential to reduce the vessel’s electric demand by 9.5% during a heating season, in comparison to direct electric heating.
| Item URL in elib: | https://elib.dlr.de/217815/ | ||||||||||||||||||||||||
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| Document Type: | Article | ||||||||||||||||||||||||
| Title: | A case study of enhancing energy efficiency in battery-electric ferries through low-temperature heat pump integration | ||||||||||||||||||||||||
| Authors: |
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| Date: | 7 October 2025 | ||||||||||||||||||||||||
| Journal or Publication Title: | Journal of Marine Engineering & Technology | ||||||||||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||||||||||||||
| DOI: | 10.1080/20464177.2025.2567723 | ||||||||||||||||||||||||
| Editors: |
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| Publisher: | Taylor & Francis | ||||||||||||||||||||||||
| ISSN: | 2046-4177 | ||||||||||||||||||||||||
| Status: | Published | ||||||||||||||||||||||||
| Keywords: | Heat pump; Wärmepumpe; battery-electric ferry; batterie-elektrische Fähre | ||||||||||||||||||||||||
| HGF - Research field: | Energy | ||||||||||||||||||||||||
| HGF - Program: | other | ||||||||||||||||||||||||
| HGF - Program Themes: | E - no assignment | ||||||||||||||||||||||||
| DLR - Research area: | Energy | ||||||||||||||||||||||||
| DLR - Program: | E - no assignment | ||||||||||||||||||||||||
| DLR - Research theme (Project): | E - no assignment | ||||||||||||||||||||||||
| Location: | Geesthacht | ||||||||||||||||||||||||
| Institutes and Institutions: | Institute of Maritime Energy Systems > Energy Converters and Systems Institute of Low-Carbon Industrial Processes > High-Temperature Heat Pumps | ||||||||||||||||||||||||
| Deposited By: | Brötje, Steffen | ||||||||||||||||||||||||
| Deposited On: | 27 Oct 2025 07:27 | ||||||||||||||||||||||||
| Last Modified: | 11 May 2026 07:02 |
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