Wen, Jiale;
Mi, Xicong;
Yao, Yubo;
Xiao, Shengying;
Yang, Jian;
Spataru, Catalina;
Weng, Yiwu;
... Lv, Xiaojing; + view all
(2025)
Optimal power allocation strategy and characteristic analyze of parallel IRGT/SOFC system for large ocean-going vessel under multi-scenario operation.
Applied Energy
, 401
(Part A)
, Article 126676. 10.1016/j.apenergy.2025.126676.
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Abstract
To address the demand for long-endurance and high-efficiency operation of large ocean-going vessels in multi-scenario missions, this study proposes an innovative all-electric propulsion system combining parallel intercooled reheat gas turbine (IRGT) and solid oxide fuel cell (SOFC). The coordination power switching characteristics and relationships between them under typical scenarios are investigated, and optimal power allocation strategies for wider load range considering efficiency and safety are developed. Results show that the validated 68 MW vessel hybrid system achieves 50.1 % efficiency with 2.5 % maximum error at design point, demonstrating high accuracy. When the vessel under full speed scenario, the propulsion system operates at 2.11 power ratio with 50.1 % efficiency, requiring fuel larger than 0.967 kg/s to avoid turbine blade overheating. When the vessel switches to mobile cruise scenario, adjusting R1, R2 to 0.99 and 0.58 shifts to IRGT mode under 106.1 power ratio with 45.8 % efficiency, which cause wider zone from 4 to 44 MW. For non-urgent oceanic missions, vessels generally sail at economical speed to maximize cruising range. By increasing R1, R2 of unit 1 to 0.04 and 1, unit 1 switches to SOFC-dominant mode at 0.05 power ratio with 50.1 % maximum efficiency, preventing SOFC overheating. For silent scenario with power from 6 to 10 MW, regulating R1, R2 to 0 and 0.42, dual units turn to SOFC-only mode with 49.9 % maximum efficiency. The optimal strategy expands operation zone by 38.5 % to 10 %–108 % with 44.3 %–50.5 % efficiency, providing technical foundation for next-generation marine power systems with long endurance, flexible load response, and multi-scenario adaptability.
| Type: | Article |
|---|---|
| Title: | Optimal power allocation strategy and characteristic analyze of parallel IRGT/SOFC system for large ocean-going vessel under multi-scenario operation |
| DOI: | 10.1016/j.apenergy.2025.126676 |
| Publisher version: | https://doi.org/10.1016/j.apenergy.2025.126676 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | All-electric propulsion system; Dual unit IRGT/SOFC; Multiple scenario coordination; Optimal power allocation strategy; Large ocean-going vessel |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10215764 |
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