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Studies on fleet deployment optimization considering CII class constraints and biofuels
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Yanfei ZHANG1, 2, Lu LIU1, 2, Ronggui LI3, Liang FENG1, 2
Navigation of China | 2025, 48(2) : 172 - 180
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Navigation of China | 2025, 48(2): 172-180
• Green Shipping •
Studies on fleet deployment optimization considering CII class constraints and biofuels
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Yanfei ZHANG1, 2, Lu LIU1, 2, Ronggui LI3, Liang FENG1, 2
Affiliations
  • 1.State Key Laboratory of Maritime Technology and Safety, Shanghai Ship and Shipping Research Institute Co., Ltd, Shanghai 200135, China
  • 2.Key Laboratory of Marine Technology Ministry of Communications, PRC, Shanghai Ship and Shipping Research Institute Co., Ltd, Shanghai 200135, China
  • 3.COSCO SHIPPING Lines Co., Ltd, Shanghai 200080, China
Published: 2025-06-25 doi: 10.3969/j.issn.1000-4653.2025.02.022
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As the CII regulations took effect in 2023, shipping companies are under increasing pressure to comply with these stringent regulations. This paper presents a fleet optimization method for CII regulatory constraints, considering the difference in main engine fuel consumption performance within the fleet. Two scenarios are optimized: "Fleet scheduling considering single ship CII rating limits" and "Fleet scheduling with no E-class ships and the least used biofuel". The results demonstrate that the proposed optimization algorithm outperforms random scheduling in maintaining fleet CII compliance and reducing biofuel usage. This study will help shipping companies meet fleet CII regulations and reduce carbon emissions, while improving their ability to respond to international green and low-carbon regulations.

CII regulations  /  biofuel  /  fleet deployment optimization  /  liner company
Yanfei ZHANG, Lu LIU, Ronggui LI, Liang FENG. Studies on fleet deployment optimization considering CII class constraints and biofuels[J]. Navigation of China, 2025 , 48 (2) : 172 -180 . DOI: 10.3969/j.issn.1000-4653.2025.02.022
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Article Info
doi: 10.3969/j.issn.1000-4653.2025.02.022
  • Receive Date：2024-06-01
  • Online Date：2026-03-17
  • Published：2025-06-25
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  • Received：2024-06-01
Affiliations
    1.State Key Laboratory of Maritime Technology and Safety, Shanghai Ship and Shipping Research Institute Co., Ltd, Shanghai 200135, China
    2.Key Laboratory of Marine Technology Ministry of Communications, PRC, Shanghai Ship and Shipping Research Institute Co., Ltd, Shanghai 200135, China
    3.COSCO SHIPPING Lines Co., Ltd, Shanghai 200080, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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