Liquefied natural gas (LNG) offers negligible NOx and SOx emissions as well as reductions in CO2 compared with other liquid hydrocarbons. LNG is a significant player in the global energy mix, with a projection of 40% increase in demand for the next two decades. It is anticipated that the expected rise in demand will cause the fleet of LNG carriers (LNGC) to expand. This work concentrates on steam-powered LNGC, which accounted for 47% of the LNGC fleet in 2018. It performs an empirical analysis of continuous monitoring data that provide high levels of accuracy and transparency. The analysis is done on data collected from 40 LNGCs for over a year to estimate the fleet's operational profile, fuel mix and energy performance. The findings of this work are relevant for bottom-up analysis and simulation models that depend on technical assumptions, but also for emission studies such as the upcoming Fourth International Maritime Organization Greenhouse Gases study.

中文翻译：

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蒸汽推进装置液化天然气运输船运行状况的实证分析

液化天然气 (LNG) 的 NO 含量可忽略不计X所以X排放和减少二氧化碳2与其他液态碳氢化合物相比。液化天然气是全球能源结构中的重要参与者，预计未来二十年需求将增长 40%。预计需求的预期增长将导致液化天然气运输船（LNGC）船队的扩张。这项工作的重点是蒸汽动力 LNGC，它在 2018 年占 LNGC 船队的 47%。它对提供高水平准确性和透明度的连续监测数据进行了实证分析。该分析是根据从 40 艘 LNGC 收集的一年多来的数据进行的，以估计船队的运营概况、燃料组合和能源绩效。这项工作的结果与依赖于技术假设的自下而上的分析和模拟模型相关，