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Start Over Author "Ma, Zedong" Journal international journal of hydrogen energy
2 results on '"Ma, Zedong"'

2. Effects of direct water injection on engine performance in a hydrogen (H2)-fueled engine at varied amounts of injected water and water injection timing

Author

Chuanqi Tang, Shuofeng Wang, Cheng Shi, Changwei Ji, Ma Zedong, Xiaoyu Cong, Xu Puyan, and Hao Meng

Subjects
Thermal efficiency, Hydrogen, Renewable Energy, Sustainability and the Environment, Chemistry, Analytical chemistry, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Combustion, 01 natural sciences, 0104 chemical sciences, law.invention, Ignition system, Fuel Technology, law, Water injection (engine), 0210 nano-technology, Nitrogen oxides, NOx
Abstract

In this paper, the effects of direct water injection (WI) on characteristics of combustion and emission for a hydrogen (H2)-fueled spark ignition (SI) engine were experimentally investigated. The experiments conducted under different amounts of water injection (AWI) and varied water injection timing (WIT). The experimental results showed that in-cylinder pressure decreased, indicated thermal efficiency (ITE) increased, and the flame development (CA0-10) and propagation (CA10-90) periods prolonged when AWI raised. When AIW grew to 4.5 mg/cycle, Nitrogen oxides (NOx) expelled from the original engine decreased by 53.7% when excess air ratio (λ) was 1.15. Early WIT had positive effects on the reduction of NOx emissions. When WIT retarded, in-cylinder pressure increased, ITE decreased and CA0-10 and CA10-90 shortened, NOx emissions rapidly increased.

Published
2020

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