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Combustion and emissions performance of a DME-enriched spark-ignited methanol engine at idle condition

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  • Liang, Chen
  • Ji, Changwei
  • Liu, Xiaolong

Abstract

Dimethyl ether (DME) and methanol are thought to be one of the most promising alternative fuels for IC engines. Meanwhile, previous investigations also have pointed out the good prospects for adopting DME and methanol in IC engines. The experiments in this paper were carried out at idle condition to investigate the effect of applying the methanol/DME blended fuel in a SI engine. The engine was modified to be fueled with the mixture of methanol and DME which were injected into the engine intake ports simultaneously. Various DME fractions were selected to investigate the effect of DME addition on engine performance. The experimental results showed that indicated thermal efficiency was increased by 25% and coefficient of cyclic variation in engine speed was decreased by 29.2% at the DME energy fraction of 85.2% in the total fuel. In addition, both flame development and propagation durations were shortened with the increase of DME enrichment level at idle condition. Meanwhile, the largest drop of HC emissions was nearly 50% compared with the original methanol engine at stoichiometric condition. However, CO and NOx emissions increase with the addition of DME.

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  • Liang, Chen & Ji, Changwei & Liu, Xiaolong, 2011. "Combustion and emissions performance of a DME-enriched spark-ignited methanol engine at idle condition," Applied Energy, Elsevier, vol. 88(11), pages 3704-3711.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:11:p:3704-3711
    DOI: 10.1016/j.apenergy.2011.04.056
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    15. Gong, Changming & Li, Zhaohui & Sun, Jingzhen & Liu, Fenghua, 2020. "Evaluation on combustion and lean-burn limitof a medium compression ratio hydrogen/methanol dual-injection spark-ignition engine under methanol late-injection," Applied Energy, Elsevier, vol. 277(C).
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    17. Wang, Xin & Ge, Yunshan & Liu, Linlin & Peng, Zihang & Hao, Lijun & Yin, Hang & Ding, Yan & Wang, Junfang, 2015. "Evaluation on toxic reduction and fuel economy of a gasoline direct injection- (GDI-) powered passenger car fueled with methanol–gasoline blends with various substitution ratios," Applied Energy, Elsevier, vol. 157(C), pages 134-143.
    18. Gong, Changming & Yi, Lin & Zhang, Zilei & Sun, Jingzhen & Liu, Fenghua, 2020. "Assessment of ultra-lean burn characteristics for a stratified-charge direct-injection spark-ignition methanol engine under different high compression ratios," Applied Energy, Elsevier, vol. 261(C).
    19. Awad, Omar I. & Mamat, R. & Ali, Obed M. & Sidik, N.A.C. & Yusaf, T. & Kadirgama, K. & Kettner, Maurice, 2018. "Alcohol and ether as alternative fuels in spark ignition engine: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 82(P3), pages 2586-2605.
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    21. Ji, Changwei & Shi, Lei & Wang, Shuofeng & Cong, Xiaoyu & Su, Teng & Yu, Menghui, 2017. "Investigation on performance of a spark-ignition engine fueled with dimethyl ether and gasoline mixtures under idle and stoichiometric conditions," Energy, Elsevier, vol. 126(C), pages 335-342.
    22. Huang, Yanjun & Khajepour, Amir & Wang, Hong, 2016. "A predictive power management controller for service vehicle anti-idling systems without a priori information," Applied Energy, Elsevier, vol. 182(C), pages 548-557.
    23. Navarro, Emilio & Leo, Teresa J. & Corral, Roberto, 2013. "CO2 emissions from a spark ignition engine operating on natural gas–hydrogen blends (HCNG)," Applied Energy, Elsevier, vol. 101(C), pages 112-120.
    24. Gong, Changming & Wei, Fuxing & Si, Xiankai & Liu, Fenghua, 2018. "Effects of injection timing of methanol and LPG proportion on cold start characteristics of SI methanol engine with LPG enriched port injection under cycle-by-cycle control," Energy, Elsevier, vol. 144(C), pages 54-60.

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