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Numerical Investigation of the Application of Miller Cycle and Low-Carbon Fuels to Increase Diesel Engine Efficiency and Reduce Emissions

Author

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  • Edward Roper

    (Department of Engineering, Durham University, Durham DH1 3LE, UK)

  • Yaodong Wang

    (Department of Engineering, Durham University, Durham DH1 3LE, UK)

  • Zhichao Zhang

    (Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK)

Abstract

In this paper, validated simulations using Ricardo WAVE have been performed to investigate the effect of the Miller cycle and low-carbon fuels on the performance (power, torque, BTE and BSFC) and emissions of a diesel engine. The results show that the increased Miller cycle effect (larger deviation of the advanced or retarded intake valve closing from the standard intake valve closing time) will decrease NO x , CO and HC emissions, and slightly improve brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) with slight loss in engine performance and increase in soot emissions. An engine running B0 (diesel with 0% Biodiesel in the blend) with a −18% Miller cycle effect has a reduction in NO x of 9% and CO of 4.3% with a decrease of 1.6% in power at the rated engine speed. Using low carbon fuels drastically reduces emissions with reduced BTE and increased BSFC. When used in conjunction, the Miller cycle and low-carbon fuels have an improved effect on both performance and emissions. The optimal results demonstrate that using B60 (60% Biodiesel in the blend) and a −8% Miller effect contributes to a 1.5% improvement in power, 1.2% in BTE, 13.3% in NO x , 38.5% in CO , 8.9% in HC , and 33.0% in soot at a cost of 6.0% increase in BSFC. The results show that it is an easy way to reduce NO x , CO , HC and soot emissions and increase the BTE of the engine by combining Miller cycle and low-carbon fuels.

Suggested Citation

  • Edward Roper & Yaodong Wang & Zhichao Zhang, 2022. "Numerical Investigation of the Application of Miller Cycle and Low-Carbon Fuels to Increase Diesel Engine Efficiency and Reduce Emissions," Energies, MDPI, vol. 15(5), pages 1-20, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:5:p:1783-:d:760865
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    References listed on IDEAS

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    Cited by:

    1. Gulmira Abbas & Alimujiang Kasimu, 2023. "Characteristics of Land-Use Carbon Emissions and Carbon Balance Zoning in the Economic Belt on the Northern Slope of Tianshan," Sustainability, MDPI, vol. 15(15), pages 1-27, July.
    2. Motong Yang & Yaodong Wang, 2023. "Application of Miller Cycle and Net-Zero Fuel(s) to Diesel Engine: Effect on the Performance and NOx Emissions of a Single-Cylinder Engine," Energies, MDPI, vol. 16(5), pages 1-21, March.

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