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Experimental multiple parameters optimization of the injection strategies for a turbocharged direct injection hydrogen engine to achieve highly efficient and clean performance

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  • Zhang, Shi-wei
  • Sun, Bai-gang
  • Luo, Qing-he
  • Bao, Ling-zhi
  • Li, Xiang-yu
  • Leach, Felix

Abstract

Improving the brake thermal efficiency (BTE) and reducing NOx emissions are two main goals for hydrogen-powered internal combustion engines to achieve efficient and clean performance. This paper focuses on the multiple parameters optimization of injection and ignition both experimentally and numerically based on a 2.0L turbocharged direct injection hydrogen engine. Firstly, the effects of single and split injection on engine performance, in-cylinder mixing and combustion characteristics are investigated. Secondly, the single-factor effect of split injection parameters and spark timing on engine performance are obtained with different engine speeds. Significant interaction effects are detected between these factors. Thus, a multi-parameter optimization is conducted based on the response surface methodology method to analyze the co-relationship of factors (split injection control parameters and ignition) on responses (BTE, NOx emissions, and knock intensity) at high-load. Finally, a maximum BTE of 43.03 % and a reduction in NOx emissions by 71.19 % are achieved with the help of model prediction at 2500 rpm and a load of 1.40 MPa. Further optimization of other engine speeds is conducted, and the boundary of high-efficiency region (BTE>40 %) covers over 50 % of the load map after optimization. These results can provide valuable support for the performance improvement of efficiency and clean hydrogen engines.

Suggested Citation

  • Zhang, Shi-wei & Sun, Bai-gang & Luo, Qing-he & Bao, Ling-zhi & Li, Xiang-yu & Leach, Felix, 2024. "Experimental multiple parameters optimization of the injection strategies for a turbocharged direct injection hydrogen engine to achieve highly efficient and clean performance," Energy, Elsevier, vol. 312(C).
    • Handle: RePEc:eee:energy:v:312:y:2024:i:c:s036054422403370x
    DOI: 10.1016/j.energy.2024.133592
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    References listed on IDEAS

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    1. Pandey, Jayashish Kumar & Dinesh, M.H. & Kumar, G.N., 2023. "A comparative study of NOx mitigating techniques EGR and spark delay on combustion and NOx emission of ammonia/hydrogen and hydrogen fuelled SI engine," Energy, Elsevier, vol. 276(C).
    2. Han, Taehoon & Singh, Ripudaman & Lavoie, George & Wooldridge, Margaret & Boehman, André, 2020. "Multiple injection for improving knock, gaseous and particulate matter emissions in direct injection SI engines," Applied Energy, Elsevier, vol. 262(C).
    3. 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).
    4. Meng, Hao & Ji, Changwei & Shen, Jianpu & Yang, Jinxin & Xin, Gu & Chang, Ke & Wang, Shuofeng, 2023. "Analysis of combustion characteristics under cooled EGR in the hydrogen-fueled Wankel rotary engine," Energy, Elsevier, vol. 263(PB).
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