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Numerical study of the performance and NOx emission of a diesel-methanol dual-fuel engine using multi-objective Pareto optimization

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  • Park, Sangjun
  • Cho, Jungkeun
  • Park, Jungsoo
  • Song, Soonho

Abstract

The effect of methanol addition on the performance and NOx emission of a diesel engine was investigated using one-dimensional engine cycle simulation. The methanol component was injected into the intake manifold of a diesel engine at a certain energy fraction (0, 5, 10, or 15%) of the fuel. The in-cylinder pressure and temperature decreased as the methanol content increased due to the lower cetane number and lower heating value of methanol. The resulting decrease in the combustion efficiency lowered the NOx emission and brake thermal efficiency of the engine, and consequently deteriorated the brake specific fuel consumption (BSFC). The BSFC decreased but the NOx emission increased with advanced injection timing under dual-fuel operating conditions. Response surface plots of the BSFC and NOx emission as a function of the injection timing and exhaust gas recirculation (EGR) rate were obtained using a design of experiment method. The optimal Pareto fronts that improved both the BSFC and NOx emission were found. The EGR rate had a greater influence on the optimal Pareto front than the injection timing, which suggested that design parameters such as the injection timing and EGR rate could be used to control the performance and emission under various duel-fuel conditions.

Suggested Citation

  • Park, Sangjun & Cho, Jungkeun & Park, Jungsoo & Song, Soonho, 2017. "Numerical study of the performance and NOx emission of a diesel-methanol dual-fuel engine using multi-objective Pareto optimization," Energy, Elsevier, vol. 124(C), pages 272-283.
    • Handle: RePEc:eee:energy:v:124:y:2017:i:c:p:272-283
    DOI: 10.1016/j.energy.2017.02.029
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    References listed on IDEAS

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    1. Jung, Choongsoo & Park, Jungsoo & Song, Soonho, 2015. "Performance and NOx emissions of a biogas-fueled turbocharged internal combustion engine," Energy, Elsevier, vol. 86(C), pages 186-195.
    2. Zhou, J.H. & Cheung, C.S. & Zhao, W.Z. & Leung, C.W., 2016. "Diesel–hydrogen dual-fuel combustion and its impact on unregulated gaseous emissions and particulate emissions under different engine loads and engine speeds," Energy, Elsevier, vol. 94(C), pages 110-123.
    3. Wei, Lijiang & Yao, Chunde & Han, Guopeng & Pan, Wang, 2016. "Effects of methanol to diesel ratio and diesel injection timing on combustion, performance and emissions of a methanol port premixed diesel engine," Energy, Elsevier, vol. 95(C), pages 223-232.
    4. Park, Jungsoo & Lee, Kyo Seung & Kim, Min Su & Jung, Dohoy, 2014. "Numerical analysis of a dual-fueled CI (compression ignition) engine using Latin hypercube sampling and multi-objective Pareto optimization," Energy, Elsevier, vol. 70(C), pages 278-287.
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    Cited by:

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    7. Agarwal, Avinash Kumar & Kumar, Vikram & Ankur Kalwar, Ashutosh Jena, 2022. "Fuel injection strategy optimisation and experimental performance and emissions evaluation of diesel displacement by port fuel injected methanol in a retrofitted mid-size genset engine prototype," Energy, Elsevier, vol. 248(C).
    8. Wang, Dawei & Shi, Lei & Zhu, Sipeng & Liu, Bo & Qian, Yuehua & Deng, Kangyao, 2020. "Numerical and thermodynamic study on effects of high and low pressure exhaust gas recirculation on turbocharged marine low-speed engine," Applied Energy, Elsevier, vol. 261(C).
    9. Ma, Baodong & Yao, Anren & Yao, Chunde & Wang, Wenchao & Ai, Youkai, 2021. "Numerical investigation and experimental validation on the leakage of methanol and formaldehyde in diesel methanol dual fuel engine with different valve overlap," Applied Energy, Elsevier, vol. 300(C).

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