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Numerical Investigation of Ammonia-Diesel Fuelled Engine Operated in RCCI Mode
Technical Paper
2023-24-0057
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Ammonia, which is one of the most produced inorganic chemicals worldwide, has gained significant attention in recent years as a carbon-free fuel due to its significant energy density in maritime and power plant applications. This fuel offers several advantages including low production costs and being safe for storage and transport. Reactivity controlled compression ignition (RCCI) combustion mode is considered as a promising strategy reducing the level of nitrogen oxides (NOx) emissions and particulate matters (PM) in internal combustion engines (ICEs) due to the lower combustion temperatures and charge homogeneity. Ammonia-based RCCI combustion strategy can offer a simultaneous reduction of CO2 and NOx. In this study, a RCCI engine fuelled by ammonia and diesel is numerically simulated considering chemical reactions kinetics mechanism of the combustion. After validating the simulation results with literature experimental data, the effect of engine operational parameters such as the initial charge temperature together with injection timing on the engine operational characteristic including in-cylinder pressure, heat release rate (HRR), indicated mean effective pressure (IMEP) and emission levels are investigated and discussed accordingly. The results indicated that advancing the start of injection (SOI) timing from 20 to 100 CAD bTDC, increased the NOx emissions concentration at the initial intake charge temperatures of 460 and 480 K. Higher initial intake charge temperature increased the level of NOx emissions while advancing SOI timing from 20 to 100 CAD bTDC did not disturb the level of CO emission significantly.
Authors
- Amir Hossein Fakhari - Iran University of Science and Technology
- Ayat Gharehghani - Iran University of Science and Technology
- Mohammad Mahdi Salahi - University of Oulu
- Amin Mahmoudzadeh Andwari - University of Oulu
- Maciej Mikulski - University of Vaasa
- Jacek Hunicz - Lublin University of Technology
- Juho Könnö - University of Oulu
Topic
Citation
Fakhari, A., Gharehghani, A., Salahi, M., Mahmoudzadeh Andwari, A. et al., "Numerical Investigation of Ammonia-Diesel Fuelled Engine Operated in RCCI Mode," SAE Technical Paper 2023-24-0057, 2023.Also In
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