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Effects of port injection of hydrous ethanol on combustion and emission characteristics in dual-fuel reactivity controlled compression ignition (RCCI) mode

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  • Liu, Haifeng
  • Ma, Guixiang
  • Hu, Bin
  • Zheng, Zunqing
  • Yao, Mingfa

Abstract

It is important to use hydrous ethanol in the engine due to the removal of water from fermented products of ethanol consumes lots of energy. In this study, the effect of hydrous ethanol on the combustion and emissions was investigated in dual-fuel reactivity controlled compression ignition (RCCI) mode with port-injected hydrous ethanol and direct-injected diesel. The purity of ethanol was changed from 60% to 100% in 10% increment by adding different volume water in pure ethanol. Meantime, the volume ratio of port-injected pure ethanol among the total fuel (abbreviated as RE) was set to 60% and 80%. Results show that the higher RE causes the decrease of the combustion efficiency and indicated thermal efficiency. With the decline of ethanol purity, the combustion efficiency decreases and the maximum pressure rise rate (MPRR) shows a tendency of firstly going down and then rising. The thermal efficiency has a small change in the ethanol purity range of 80%–100%, whereas the thermal efficiency is reduced remarkably at the ethanol purity of 60%. The reduction of ethanol purity can reduce NOx emissions but CO and THC emissions increase. Adjusting the intake temperature, EGR rate and injection pressure will improve the combustion and emissions.

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  • Liu, Haifeng & Ma, Guixiang & Hu, Bin & Zheng, Zunqing & Yao, Mingfa, 2018. "Effects of port injection of hydrous ethanol on combustion and emission characteristics in dual-fuel reactivity controlled compression ignition (RCCI) mode," Energy, Elsevier, vol. 145(C), pages 592-602.
    • Handle: RePEc:eee:energy:v:145:y:2018:i:c:p:592-602
    DOI: 10.1016/j.energy.2017.12.089
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    7. Guan, Wei & Gu, Jinkai & Pan, Xiubin & Pan, Mingzhang & Wang, Xinyan & Zhao, Hua & Tan, Dongli & Fu, Changcheng & Pedrozo, Vinícius B. & Zhang, Zhiqing, 2024. "Improvement of the light-load combustion control strategy for a heavy-duty diesel engine fueled with diesel/methonal by RSM-NSGA III," Energy, Elsevier, vol. 297(C).
    8. Rakopoulos, Constantine D. & Rakopoulos, Dimitrios C. & Kosmadakis, George M. & Papagiannakis, Roussos G., 2019. "Experimental comparative assessment of butanol or ethanol diesel-fuel extenders impact on combustion features, cyclic irregularity, and regulated emissions balance in heavy-duty diesel engine," Energy, Elsevier, vol. 174(C), pages 1145-1157.
    9. Wang, Xiaochen & Gao, Jianbing & Chen, Zhanming & Chen, Hao & Zhao, Yuwei & Huang, Yuhan & Chen, Zhenbin, 2022. "Evaluation of hydrous ethanol as a fuel for internal combustion engines: A review," Renewable Energy, Elsevier, vol. 194(C), pages 504-525.
    10. Arkadiusz Jamrozik & Wojciech Tutak & Renata Gnatowska & Łukasz Nowak, 2019. "Comparative Analysis of the Combustion Stability of Diesel-Methanol and Diesel-Ethanol in a Dual Fuel Engine," Energies, MDPI, vol. 12(6), pages 1-17, March.
    11. Gao, Zihe & Lin, Shenghui & Ji, Jie & Li, Mengyuan, 2019. "An experimental study on combustion performance and flame spread characteristics over liquid diesel and ethanol-diesel blended fuel," Energy, Elsevier, vol. 170(C), pages 349-355.
    12. Mendiburu, Andrés Z. & Lauermann, Carlos H. & Hayashi, Thamy C. & Mariños, Diego J. & Rodrigues da Costa, Roberto Berlini & Coronado, Christian J.R. & Roberts, Justo J. & de Carvalho, João A., 2022. "Ethanol as a renewable biofuel: Combustion characteristics and application in engines," Energy, Elsevier, vol. 257(C).
    13. Jo, Seongin & Park, Suhan & Kim, Hyung Jun & Lee, Jong-Tae, 2019. "Combustion improvement and emission reduction through control of ethanol ratio and intake air temperature in reactivity controlled compression ignition combustion engine," Applied Energy, Elsevier, vol. 250(C), pages 1418-1431.

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