Department of Naval Architecture and Marine Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
Department of Marine Engineering Technology, College of Maritime Transport & Technology, Arab Academy for Science, Technology and Maritime Transport, Alexandria, 1029, Egypt.
Environ Sci Pollut Res Int. 2021 Mar;28(12):15210-15222. doi: 10.1007/s11356-020-11639-6. Epub 2020 Nov 24.
Shipping is a significant contributor to global greenhouse gas (GHG) and air pollutant emissions. These emissions mainly come from using diesel fuel for power generation. In this paper, the natural gas is proposed as an alternative marine fuel to be used instead of conventional marine diesel oil. Numerical analysis of environmental and economic benefits of the natural gas-diesel dual-fuel engine is carried out. As a case study, a container ship of class A7 owned by Hapag-Lloyd has been investigated. The results show that the proposed dual-fuel engine achieves environmental benefits for reducing carbon dioxide (CO), nitrogen oxides (NOx), sulfur oxides (SOx), particulate matter (PM), and carbon monoxide (CO) emissions by 20.1%, 85.5%, 98%, 99%, and 55.7% with cost effectiveness of 109, 840, 9864, 27761, and 4307 US$/ton, respectively. The results show that the conversion process to the dual-fuel engine will comply with the current and future IMO regulations regarding air pollutant emissions. On the other hand, using the proposed dual-fuel engine on the container ship will improve the ship energy efficiency index by 29.6 % with annual fuel cost saving of 4.77 million US dollars.
航运是全球温室气体（GHG）和空气污染物排放的主要贡献者。这些排放物主要来自于使用柴油发电。在本文中，提议使用天然气作为替代船用燃料，以替代传统的船用柴油。对天然气-柴油双燃料发动机的环境和经济效益进行了数值分析。作为案例研究，对 Hapag-Lloyd 拥有的 A7 级集装箱船进行了调查。结果表明，所提出的双燃料发动机通过减少二氧化碳（CO）、氮氧化物（NOx）、硫氧化物（SOx）、颗粒物（PM）和一氧化碳（CO）的排放，分别实现了 20.1%、85.5%、98%、99%和 55.7%的环境效益，成本效益分别为 109、840、9864、27761 和 4307 美元/吨。结果表明，向双燃料发动机的转换过程将符合当前和未来 IMO 关于空气污染物排放的规定。另一方面，在集装箱船上使用所提议的双燃料发动机将使船舶能效指数提高 29.6%，每年节省燃料成本 477 万美元。
