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• W3034506473 abstract "This numerical study covers the engine performance and emissions of a dual-fuel compression-ignition engine fueled by hydrogen/diesel mixtures. Advanced simulations of the combustion process were performed by focusing on simulating the engine performance and emissions at different hydrogen quantities. Different factors that have significant effects on engine performance and emissions, such as exhaust gas recirculation and modifying diesel injection timing (IT), were also considered in this study. The relationship between the performance, emissions, and the operating parameters considered in this work are investigated and explained. A significant reduction of soot emissions by approximately 32.5% has been achieved by increasing hydrogen levels up to 37.5%; however, this has led to an increase in nitrogen oxides (NOx) emissions by ~22%. To overcome this problem, the optimum operating parameters that will lead to minimum emissions and maximum efficiency were also sought. Hydrogen rates, exhaust gas recirculation (EGR) rates, and diesel injection timing were the main operating conditions while the engine performance and NOx/soot emissions were the objectives. The best operating conditions for hydrogen/diesel engines were obtained by solving the multi-objective problem of maximizing the efficiency while minimizing the NOx and soot emissions. This multi-objective optimization problem (MOOP) with conflicting objectives was solved by using different optimization techniques, including regression analysis, artificial neural networks, and genetic algorithms. By solving MOOP, the first preferred operating condition at ~13% hydrogen, 4% EGR, and 30 BTDC of diesel injection timing was obtained." @default.
• W3034506473 created "2020-06-19" @default.
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• W3034506473 date "2020-07-01" @default.
• W3034506473 modified "2023-10-14" @default.
• W3034506473 title "Multi-objective optimization of operating parameters for a H2/Diesel dual-fuel compression-ignition engine" @default.
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• W3034506473 doi "https://doi.org/10.1016/j.ijhydene.2020.05.071" @default.
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