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Potential of the Synthetic Fuel Oxymethylene Ether (OME) for the Usage in a Single-Cylinder Non-Road Diesel Engine: Thermodynamics and Emissions

Author

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  • Florian Zacherl

    (Ostbayerische Technische Hochschule (OTH) Regensburg, Laboratory of Combustion Engines and Emission Control, Seybothstraße 2, 93053 Regensburg, Germany)

  • Christoph Wopper

    (Ostbayerische Technische Hochschule (OTH) Regensburg, Laboratory of Combustion Engines and Emission Control, Seybothstraße 2, 93053 Regensburg, Germany)

  • Peter Schwanzer

    (Scale MT GmbH, Franz-Mayer-Straße 1, 93053 Regensburg, Germany)

  • Hans-Peter Rabl

    (Ostbayerische Technische Hochschule (OTH) Regensburg, Laboratory of Combustion Engines and Emission Control, Seybothstraße 2, 93053 Regensburg, Germany)

Abstract

Non-road sectors, such as agriculture and construction machinery, require high energy densities and flexibility in use, which is why diesel engines are mainly used. The use of climate-neutral fuels, produced from renewable energies, such as Oxymethylene Ether (OME) as a diesel substitute, can significantly reduce CO 2 and pollutant emissions in these sectors. In addition to CO 2 neutrality, OME also offers improved combustion characteristics compared to diesel fuel, eliminating the soot–NO x trade-off and thus enabling new opportunities in engine design and calibration. In this paper, the combustion of pure OME on a close-to-production, single-cylinder non-road diesel engine with a pump–line–nozzle injection system is analyzed. A variation of the center of combustion at constant power output was performed for diesel and OME at different operating points. Two injectors were investigated with OME. A study on ignition delay and a detailed thermodynamic analysis was carried out. In addition, the exhaust emissions CO, NO x , V O C , as well as particulate-matter, -number and -size distributions were measured. With OME, a significantly shorter ignition delay as well as a shortened combustion duration could be observed, despite a longer injection duration. In addition, the maximum injection pressure increases. V O C and CO emissions are reduced. Particulate matter was reduced by more than 99% and particle number (>10 nm) was reduced by multiple orders of magnitude. The median of the particle size distribution shifts from 60 to 85 nm (diesel) into a diameter range of sub 23 nm (OME). A significant reduction of NO x emissions with OME enables new degrees of freedom in engine calibration and an efficiency advantage without hardware adaption.

Suggested Citation

  • Florian Zacherl & Christoph Wopper & Peter Schwanzer & Hans-Peter Rabl, 2022. "Potential of the Synthetic Fuel Oxymethylene Ether (OME) for the Usage in a Single-Cylinder Non-Road Diesel Engine: Thermodynamics and Emissions," Energies, MDPI, vol. 15(21), pages 1-26, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7932-:d:953178
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    References listed on IDEAS

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    1. Omari, Ahmad & Heuser, Benedikt & Pischinger, Stefan & Rüdinger, Christoph, 2019. "Potential of long-chain oxymethylene ether and oxymethylene ether-diesel blends for ultra-low emission engines," Applied Energy, Elsevier, vol. 239(C), pages 1242-1249.
    2. Pastor, José V. & García, Antonio & Micó, Carlos & Lewiski, Felipe, 2020. "An optical investigation of Fischer-Tropsch diesel and Oxymethylene dimethyl ether impact on combustion process for CI engines," Applied Energy, Elsevier, vol. 260(C).
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    1. Rina Ren & Tiexiong Su & Fukang Ma & Wei Yang & Xin Zhao & Chunlong Xu, 2022. "Research on the Effect of the Outlet Throttle Diameter Deviation on the Pressure Relief Rate of the Injector Control Valve," Energies, MDPI, vol. 16(1), pages 1-19, December.

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