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A Numerical Study on Combustion and Emission Characteristics of a Medium-Speed Diesel Engine Using In-Cylinder Cleaning Technologies

Author

Listed:
  • Shuang He

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

  • Bao-Guo Du

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

  • Li-Yan Feng

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

  • Yao Fu

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

  • Jing-Chen Cui

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

  • Wu-Qiang Long

    (Institute of Internal Combustion Engine, Dalian University of Technology, Dalian 116024, China)

Abstract

In order to clarify the potential of internal purification methods on medium speed diesel engines to meet the IMO Tier III nitrogen oxide (NO x ) emission regulations, combined 1-D engine working cycle simulation and 3-D CFD simulation were conducted to predict the performance and emissions of the engine under different valve close timings, geometric compression ratios, injection timings, and Exhaust Gas Recirculation (EGR) rates. The numerical results show that, as the inlet valve close timing is advanced, NO x is reduced by as much as 27%, but the peak of premixed combustion heat release rate is increased; this can weaken the ability to reduce NO x with the Miller cycle. Moreover, the peak of premixed combustion heat release rate is reduced when the geometric compression ratio is increased to 15.4, and linking with injection timing by delaying 6°CA can further reduce NO x by 55.3% from the baseline. Finally, over 80% NO x reduction can be achieved when the above schemes are combined with over 15% EGR. The NO x and soot can be reduced simultaneously by using moderate Miller cycle combination with moderate EGR, and the results show a large reduction of NO x and moderate reduction of soot. This can be a feasible technical solution to meet Tier III regulations.

Suggested Citation

  • Shuang He & Bao-Guo Du & Li-Yan Feng & Yao Fu & Jing-Chen Cui & Wu-Qiang Long, 2015. "A Numerical Study on Combustion and Emission Characteristics of a Medium-Speed Diesel Engine Using In-Cylinder Cleaning Technologies," Energies, MDPI, vol. 8(5), pages 1-20, May.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:5:p:4118-4137:d:49334
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    References listed on IDEAS

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    1. Maiboom, Alain & Tauzia, Xavier & Hétet, Jean-François, 2008. "Experimental study of various effects of exhaust gas recirculation (EGR) on combustion and emissions of an automotive direct injection diesel engine," Energy, Elsevier, vol. 33(1), pages 22-34.
    2. Benajes, Jesús & Molina, Santiago & Novella, Ricardo & Belarte, Eduardo, 2014. "Evaluation of massive exhaust gas recirculation and Miller cycle strategies for mixing-controlled low temperature combustion in a heavy duty diesel engine," Energy, Elsevier, vol. 71(C), pages 355-366.
    3. Verschaeren, Roel & Schaepdryver, Wouter & Serruys, Thomas & Bastiaen, Marc & Vervaeke, Lieven & Verhelst, Sebastian, 2014. "Experimental study of NOx reduction on a medium speed heavy duty diesel engine by the application of EGR (exhaust gas recirculation) and Miller timing," Energy, Elsevier, vol. 76(C), pages 614-621.
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    Cited by:

    1. Giorgio Zamboni & Simone Moggia & Massimo Capobianco, 2017. "Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine," Energies, MDPI, vol. 10(1), pages 1-18, January.
    2. Yuxi Miao & Zhengxing Zuo & Huihua Feng & Chendong Guo & Yu Song & Boru Jia & Yuyao Guo, 2016. "Research on the Combustion Characteristics of a Free-Piston Gasoline Engine Linear Generator during the Stable Generating Process," Energies, MDPI, vol. 9(8), pages 1-19, August.

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