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Experimental Assessment of the Impact of Replacing Diesel Fuel with CNG on the Concentration of Harmful Substances in Exhaust Gases in a Dual Fuel Diesel Engine

Author

Listed:
  • Mirosław Karczewski

    (Faculty of Mechanical Engineering, Military University of Technology, 2 Gen, Sylwestra Kaliskiego Street, 00-908 Warsaw, Poland)

  • Grzegorz Szamrej

    (Military University of Technology in Warsaw, Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland)

  • Janusz Chojnowski

    (Faculty of Mechanical Engineering, Military University of Technology, 2 Gen, Sylwestra Kaliskiego Street, 00-908 Warsaw, Poland)

Abstract

The problem of global warming and related climate change, as well as rising oil prices, is driving the implementation of ideas that not only reduce the consumption of liquid fuels, but also reduce greenhouse gas emissions. One of them is the use of natural gas as an energy source. It is a hydrocarbon fuel with properties allowing the reduction of CO 2 emissions during its combustion. Therefore, solutions are being implemented that allow natural gas to be supplied to means of transport, which are trucks of various categories and purposes. This article presents the results of tests of an engine from a used semi-truck, to which an innovative compressed natural gas (CNG) supply system was installed. This installation (both hardware and software), depending on the engine operating conditions, enables mass replacement by natural gas (up to 90%) of the basic fuel—diesel oil. During the tests, on the basis of the obtained results, the influence of the diesel fuel/CNG exchange ratio under various engine operating conditions on the concentration of toxic CO 2 , CO, NO, NO 2 , CH 4, C 2 H 6, NMHC, NH 3 and exhaust smoke was assessed. The test results confirm that, compared to conventional fueling, the diesel/CNG-fueled engine allows for a significant reduction in CO 2 concentration even in a car operated for several years with diesel fuel and with high mileage. The use of a non-factory installation significantly increased the concentration of methane CH 4 , nitrogen dioxide NO 2 and carbon monoxide CO in the exhaust gas. It was found that the smoke content and the temperature of exhaust gases did not decrease with increasing ratio of fuel replacement. The concentration of CO, NO X , CH 4 and NMHC was increased, while the concentration of CO 2 , C 2 H 6 , NH 3 and the consumption of diesel fuel by the engine, decreased significantly. The innovation of the research is based on the use of a modern and unique engine gas fuel system control system where the original fuel supply system with unit pumps is able to reduce diesel oil consumption by up to 90%.

Suggested Citation

  • Mirosław Karczewski & Grzegorz Szamrej & Janusz Chojnowski, 2022. "Experimental Assessment of the Impact of Replacing Diesel Fuel with CNG on the Concentration of Harmful Substances in Exhaust Gases in a Dual Fuel Diesel Engine," Energies, MDPI, vol. 15(13), pages 1-26, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4563-:d:845134
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    References listed on IDEAS

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    Cited by:

    1. Marian Gieras & Adrian Marek Trzeciak, 2024. "New Aspects of the Pulse Combustion Process," Energies, MDPI, vol. 17(6), pages 1-21, March.
    2. Janusz Chojnowski & Tadeusz Dziubak, 2024. "Multi-Criteria Analysis of Semi-Trucks with Conventional and Eco-Drives on the EU Market," Energies, MDPI, vol. 17(5), pages 1-24, February.
    3. Mirosław Karczewski & Grzegorz Szamrej, 2023. "Experimental Evaluation of the Effect of Replacing Diesel Fuel by CNG on the Emission of Harmful Exhaust Gas Components and Emission Changes in a Dual-Fuel Engine," Energies, MDPI, vol. 16(1), pages 1-32, January.
    4. Grzegorz Szamrej & Mirosław Karczewski, 2024. "Exploring Hydrogen-Enriched Fuels and the Promise of HCNG in Industrial Dual-Fuel Engines," Energies, MDPI, vol. 17(7), pages 1-51, March.

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    Keywords

    dual fuel; diesel-CNG; CNG;
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