Simulation Study on Combustion Performance of Ammonia-Hydrogen Fuel Engines

Duanzheng Zhao, Wenzhi Gao (), Yuhuai Li, Zhen Fu, Xinyu Hua and Yuxuan Zhang
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Duanzheng Zhao: State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
Wenzhi Gao: State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
Yuhuai Li: GAC Research and Development Center, 668 Jinshan Road East, Guangzhou 511434, China
Zhen Fu: State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
Xinyu Hua: State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
Yuxuan Zhang: State Key Laboratory of Engines, Tianjin University, 135 Yaguan Road, Tianjin 300350, China

Energies, 2024, vol. 17, issue 10, 1-17

Abstract: Ammonia is a very promising alternative fuel for internal combustion engines, but there are some disadvantages, such as difficulty in ignition and slow combustion rate when ammonia is used alone. Aiming to address the problem of ammonia combustion difficulty, measures are proposed to improve ammonia combustion by blending hydrogen. A one-dimensional turbocharged ammonia-hydrogen engine simulation model was established, and the combustion model was corrected and verified. Using the verified one-dimensional model, the effects of different ratios of hydrogen to ammonia, different rotational speeds and loads on the combustion performance are investigated. The results show that the ignition delay and combustion duration is shortened with the increase of the hydrogen blending ratio. The appropriate amount of hydrogen blending can improve the brake’s thermal efficiency. With the increase in engine speed, increasing the proportion of hydrogen blending is necessary to ensure reliable ignition. In conclusion, the ammonia-hydrogen fuel engine has good combustion performance, but it is necessary to choose the appropriate hydrogen blending ratio according to the engine’s operating conditions and requirements.

Keywords: ammonia-hydrogen fuel engine; sensitivity analysis; hydrogen blending ratio; ignition timing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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