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Computational Investigation of Combustion, Performance, and Emissions of a Diesel-Hydrogen Dual-Fuel Engine

Author

Listed:
  • Bo Zhang

    (CRRC Academy Corporation Limited, Beijing 100160, China)

  • Huaiyu Wang

    (School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China)

  • Shuofeng Wang

    (Beijing Lab of New Energy Vehicles and Key Lab of Regional Air Pollution Control, College of Energy and Power Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract

This paper aims to expose the effect of hydrogen on the combustion, performance, and emissions of a high-speed diesel engine. For this purpose, a three-dimensional dynamic simulation model was developed using a reasonable turbulence model, and a simplified reaction kinetic mechanism was chosen based on experimental data. The results show that in the hydrogen enrichment conditions, hydrogen causes complete combustion of diesel fuel and results in a 17.7% increase in work capacity. However, the increase in combustion temperature resulted in higher NOx emissions. In the hydrogen substitution condition, the combustion phases are significantly earlier with the increased hydrogen substitution ratio ( HSR ), which is not conducive to power output. However, when the HSR is 30%, the CO, soot, and THC reach near-zero emissions. The effect of the injection timing is also studied at an HSR of 90%. When delayed by 10°, IMEP improves by 3.4% compared with diesel mode and 2.4% compared with dual-fuel mode. The NOx is reduced by 53% compared with the original dual-fuel mode. This study provides theoretical guidance for the application of hydrogen in rail transportation.

Suggested Citation

  • Bo Zhang & Huaiyu Wang & Shuofeng Wang, 2023. "Computational Investigation of Combustion, Performance, and Emissions of a Diesel-Hydrogen Dual-Fuel Engine," Sustainability, MDPI, vol. 15(4), pages 1-15, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3610-:d:1069989
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    References listed on IDEAS

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    Cited by:

    1. Zhen Shang & Yao Sun & Xiumin Yu & Ling He & Luquan Ren, 2023. "Effect of Hydrogen-Rich Syngas Direct Injection on Combustion and Emissions in a Combined Fuel Injection—Spark-Ignition Engine," Sustainability, MDPI, vol. 15(11), pages 1-15, May.

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