AISデータから排出削減へ：洋上風力設置作業船の脱炭素化戦略の評価

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:AIS実データと船種別制約を統合した排出モデリング手法は、建設段階排出のライフサイクル算定研究に応用できる。

🏢実務担当者:洋上風力の建設サプライヤーやEPCは、船種別の脱炭素化経路を調達・Scope 3算定に反映できる。

🏛政策担当者:洋上風力の建設段階排出を政策・制度設計でどう扱うか、港湾充電インフラ整備の根拠になり得る。

Abstract This paper examines how different vessel decarbonisation pathways can reduce CO2 emissions from vessels supporting construction of offshore wind farm (OWF) infrastructure. Although electricity generated via offshore wind already has one of the lowest lifecycle carbon footprints of all electricity sources, vessel operations during construction remain a notable contributor, accounting for approximately 6% of total lifecycle GHG emissions depending on site distance from port (Ørsted 2026). This study assesses how three key vessel types, hereafter referred to as the Study Vessel Types (Jack-Up Installation Vessels, Offshore Construction Vessels, and Cable Lay Vessels), operational, and design constraints influence the feasibility and effectiveness of different decarbonisation strategies. The analysis applies a modelling approach using real-world vessel activity data from a representative OWF installation campaign. Automatic Identification System (AIS)-derived operational profiles are integrated with vessel-specific characteristics, including type, size, and engine configuration. Multiple decarbonisation pathways are evaluated, including shore power connection, methanol fuel, hydrogen fuel, and hybrid propulsion. Fuel consumption and associated CO2 emissions are calculated across a range of operating states to quantify the impact of each pathway under realistic operating conditions. Results indicate that decarbonisation potential varies significantly across vessel classes due to differences in operational patterns and energy requirements. Offshore Construction Vessels spend a significant portion of their time in port, making them well suited for shore- based charging, creating the opportunity to achieve comparatively high emissions reductions. In contrast Cable Laying Vessels, and Jack-Up Installation Vessels operate for extended periods offshore and require substantial energy for dynamic positioning and construction activities, making alternative fuels and hybrid systems more suitable decarbonisation pathways. Analysis further suggests that different vessel categories contribute unequally to total vessel emissions, and their distinct decarbonisation pathways lead to varying overall emissions reduction outcomes. Consequently, no single solution is sufficient across the fleet; instead, a tailored combination of technologies is required to maximise system-level emissions reductions. This paper provides a data-driven, operationally grounded comparison of vessel decarbonisation pathways based on real-world OWF installation activity. It offers new insights into how vessel-specific constraints and operational profiles shape decarbonisation outcomes, highlighting the importance of differentiated strategies and improving the robustness of emissions modelling in carbon lifecycle assessments.

• crossref https://doi.org/10.2118/235985-msfirst seen 2026-11-06 06:02:56