Energy-specific greenhouse gas emissions measurements from 2-stroke marine diesel engine using liquefied natural gas

IF 1.5 4区工程技术 Q3 ENGINEERING, MARINE

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment Pub Date : 2023-04-13 DOI:10.1177/14750902231166442

Kang-Ki Lee, Wilfried Hochegger, A. Schönborn

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引用次数: 2

Abstract

This study reports the energy specific air emissions from a diesel-cycle high pressure injection dual fuel engine for operation on liquefied natural gas and heavy fuel oil. An experiment at sea was performed onboard a bulk carrier during commercial voyages, to measure the efficiency of the engine and to measure air emissions relevant to air pollution and climate impact for operation on both fuels. The measurements showed that the energy conversion efficiency of the engine was higher for operation on liquefied natural gas because its lower NOx emissions permitted the use of a higher effective compression ratio whilst meeting the same NOx emissions level. The results showed that the climate impact for operation on heavy fuel oil was 2.1–2.3 times higher than for liquefied natural gas at 50% load, if considering only the emissions occurring at the engine. Analysis of the air emissions for their individual contributions to climate impacts suggested that black carbon had the strongest climate impact of all air emissions in the case of operation on heavy fuel oil. For operation on liquefied natural gas, CO2 had the strongest individual climate impact amongst the air emissions from the engine.

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使用液化天然气的二冲程船用柴油机的能源特定温室气体排放测量

本研究报告了一种以液化天然气和重质燃料油为燃料的柴油循环高压喷射双燃料发动机的能量比空气排放。在商业航行期间，在一艘散货船上进行了海上实验，以测量发动机的效率，并测量两种燃料运行时与空气污染和气候影响相关的空气排放。测量结果表明，液化天然气发动机的能量转换效率更高，因为其较低的氮氧化物排放允许使用更高的有效压缩比，同时满足相同的氮氧化物排放水平。结果表明，如果只考虑发动机排放，重质燃料油在50%负荷下的运行气候影响是液化天然气的2.1-2.3倍。对空气排放对气候影响的个别贡献的分析表明，在使用重质燃料油的情况下，黑碳对所有空气排放的气候影响最大。在使用液化天然气的情况下，在发动机排放的空气中，二氧化碳对气候的影响最大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment ENGINEERING, MARINE-

CiteScore

3.90

自引率

11.10%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Engineering for the Maritime Environment is concerned with the design, production and operation of engineering artefacts for the maritime environment. The journal straddles the traditional boundaries of naval architecture, marine engineering, offshore/ocean engineering, coastal engineering and port engineering.