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Experimental Investigation to Assess the Performance Characteristics of a Marine Two-Stroke Dual Fuel Engine under Diesel and Natural Gas Mode

Author

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  • Theofanis D. Hountalas

    (Thermal Engineering Section, School of Mechanical Engineering, National Technical University of Athens, Zografou Campus, 15772 Athens, Greece)

  • Maria Founti

    (Thermal Engineering Section, School of Mechanical Engineering, National Technical University of Athens, Zografou Campus, 15772 Athens, Greece)

  • Theodoros C. Zannis

    (Naval Architecture and Marine Engineering Section, Hellenic Naval Academy, 18539 Piraeus, Greece)

Abstract

With the aim of CO 2 emissions reduction in the maritime sector, dual fuel engines operating on natural gas are the most prominent technical and commercially available solution. A promising variant is the two-stroke high-pressure natural gas injection engine, utilizing diesel pilot fuel injection for ignition of the gaseous fuel while being able to operate in diesel-only mode. In this study, a comparative analysis of the performance and the combustion mechanism of dual fuel and diesel mode for this engine type is conducted using experimental data. Studies based on measurements conducted on actual scale are limited in the literature due to the engines’ sheer size not allowing lab testing. The analysis was conducted using measurements acquired during the factory acceptance tests involving conventional operating data and cylinder pressure data acquired using a piezoelectric sensor. In terms of the mean pressure and temperature, only minor differences were found. The specific fuel consumption was improved under low load operation for the dual fuel mode by 1.8%, while a small increase of 1.2% was found near full load. Differences were found in the combustion process from 25 to 75% load with considerably faster premixed and diffusion combustion for the dual fuel mode leading to a 6–8% decrease in combustion duration. Despite the combustion process differences, the performance under dual fuel operation was overall close to that of conventional diesel with an acceptable 1.5% efficiency reduction on average. This confirms that modern dual fuel marine engines can achieve the performance standards of conventional ones while benefiting from low-carbon fuel use to reduce CO 2 emissions.

Suggested Citation

  • Theofanis D. Hountalas & Maria Founti & Theodoros C. Zannis, 2023. "Experimental Investigation to Assess the Performance Characteristics of a Marine Two-Stroke Dual Fuel Engine under Diesel and Natural Gas Mode," Energies, MDPI, vol. 16(8), pages 1-19, April.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:8:p:3551-:d:1127795
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    References listed on IDEAS

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    1. Thomson, Heather & Corbett, James J. & Winebrake, James J., 2015. "Natural gas as a marine fuel," Energy Policy, Elsevier, vol. 87(C), pages 153-167.
    2. Yusuf, Abdulfatah Abdu & Inambao, Freddie L. & Ampah, Jeffrey Dankwa, 2022. "Evaluation of biodiesel on speciated PM2.5, organic compound, ultrafine particle and gaseous emissions from a low-speed EPA Tier II marine diesel engine coupled with DPF, DEP and SCR filter at various," Energy, Elsevier, vol. 239(PA).
    3. Thomas Buckley Imhoff & Savvas Gkantonas & Epaminondas Mastorakos, 2021. "Analysing the Performance of Ammonia Powertrains in the Marine Environment," Energies, MDPI, vol. 14(21), pages 1-41, November.
    4. Md Arman Arefin & Md Nurun Nabi & Md Washim Akram & Mohammad Towhidul Islam & Md Wahid Chowdhury, 2020. "A Review on Liquefied Natural Gas as Fuels for Dual Fuel Engines: Opportunities, Challenges and Responses," Energies, MDPI, vol. 13(22), pages 1-19, November.
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