Methane Slip, Black Carbon and Greenhouse Gas Emissions from an LNG-Fuelled Cruise Ship: Insights from FuelEU and IMO Engine Load Monitoring Methodologies

LNG燃料クルーズ船からのメタンスリップ、ブラックカーボン、温室効果ガス排出：FuelEUおよびIMOエンジン負荷監視手法からの洞察 (AI 翻訳)

Benoit Sagot, Raphael Defossez, Aurelia Miquel

プレプリント2026-06-17#エネルギー転換Origin: EU経営インパクト: 調達リスク対象セクター: transport

DOI: 10.20944/preprints202606.1265.v1

原典: https://doi.org/10.20944/preprints202606.1265.v1

🤖 gxceed AI 要約

日本語

本研究は、LNG燃料クルーズ船の実海域試験による温室効果ガス排出の包括的な評価を実施。メタンスリップはエンジン負荷に強く依存し、中高負荷で平均1.95g/kWhと低いが、低負荷で増加。従来エンジンと比較し、60%以上の負荷で約18%のメタンスリップ削減を達成。Well-to-wakeベースでCO2換算排出量を約6%削減し、うち42%はメタンスリップ低減、残りは効率改善による。LNGからMGOへの切替えではCO2換算排出量が23.5%増加。ブラックカーボン排出はLNGモードで90%以上低減。1年間の運航データに基づくELM分析により、メタンスリップに対する運航プロファイルの影響が明らかになった。IMOおよびFuelEUの手法によるメタンスリップ係数はそれぞれ1.34%と1.36%で、デフォルト値より大幅に低い。

English

This study presents a comprehensive experimental assessment of GHG emissions from an LNG-fueled cruise ship under real navigation conditions. Methane slip is strongly load-dependent: low and stable at medium-to-high loads (1.95 g/kWh, 60-90% load), with a significant increase at low load. The new engine generation shows an 18% reduction in methane slip above 60% load compared to previous models. On a well-to-wake basis, CO2-equivalent emissions are reduced by about 6% (42% from methane slip reduction, the rest from efficiency). Switching to MGO increases CO2-equivalent emissions by 23.5%. Black carbon emissions are over 90% lower in LNG mode. One-year operational data analysis shows strong influence of vessel profiles on methane slip. Methane slip coefficients from IMO and FuelEU methodologies are 1.34% and 1.36%, significantly lower than default values.

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

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

本論文は、IMOおよびFuelEU Maritime規制に基づくメタンスリップ係数の実証データを提供し、LNG燃料船の環境性能評価に重要な知見をもたらす。日本はLNG燃料船の導入を推進しており、本結果はGHG排出削減効果の定量的裏付けとして、日本海事協会や国土交通省の政策検討に貢献する可能性がある。

In the global GX context

This paper provides empirical evidence on methane slip and GHG emissions from LNG-fueled vessels, directly informing IMO and FuelEU regulatory frameworks. The findings highlight the need to incorporate real operational profiles into emission monitoring methodologies, which is critical for global shipping decarbonization targets and the development of more accurate emission factors.

👥 読者別の含意

🔬研究者:Provides real-world measurement data on methane slip and black carbon from a modern LNG dual-fuel engine, useful for emission inventory modeling and engine development.

🏢実務担当者:Shipping companies can use the load-dependent methane slip data and comparison with default coefficients to optimize operations and comply with FuelEU and IMO regulations.

🏛政策担当者:Demonstrates that current default methane slip coefficients may be overestimated, supporting revision of IMO and FuelEU methodologies for more accurate GHG accounting.

📄 Abstract（原文）

Liquefied natural gas (LNG) is increasingly used in maritime propulsion systems as a means to reduce atmospheric emissions. However, methane slip from dual-fuel engines remains a critical limitation due to the high global warming potential of methane. This study presents a comprehensive experimental assessment of greenhouse gas (GHG) emissions from a new-generation four-stroke dual-fuel engine installed on a cruise vessel and operating on both LNG and marine gas oil (MGO). Measurements were carried out during full-scale sea trials under real navigation conditions. Results show that methane slip remains strongly dependent on engine load, with low and stable values at medium-to-high loads (1.95 g/kWh average over the 60–90% range) and a significant increase at low load. Compared with a previous engine generation (46DF), the 46TS-DF engine exhibits an approximate 18% reduction in methane slip above 60% load. On a well-to-wake basis, this results in an overall CO₂-equivalent emission reduction of about 6%, of which 42% is attributable to methane slip reduction and the remainder to improved energy efficiency. In contrast, switching from LNG to MGO operation leads to a 23.5% increase in CO₂-equivalent emissions. Black carbon (BC) emissions were measured and as expected despite the limited number of available studies, they were found to be significantly lower in LNG mode, with reductions exceeding 90% compared with MGO operation. Finally, an Engine Load Monitoring (ELM) analysis based on one year of operational data highlights the strong influence of vessel operating profiles on methane slip. The application of both IMO and FuelEU methodologies yields consistent methane slip coefficients (1.34% and 1.36%, respectively), significantly lower than current default values, noting that these estimates do not include crankcase emissions. These results demonstrate the importance of integrating real operational conditions into emission assessment frameworks for LNG-fuelled vessels.

🔗 Provenance — このレコードを発見したソース

crossref https://doi.org/10.20944/preprints202606.1265.v1first seen 2026-06-18 06:41:15 · last seen 2026-07-01 05:51:08

🔔 こうした論文の新着を逃したくない方はキーワードアラートに登録（無料・3キーワードまで）。

gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。