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Effects of direct water injection on engine performance in a hydrogen (H2)-fueled engine at varied amounts of injected water and water injection timing.
- Source :
-
International Journal of Hydrogen Energy . May2020, Vol. 45 Issue 24, p13523-13534. 12p. - Publication Year :
- 2020
-
Abstract
- In this paper, the effects of direct water injection (WI) on characteristics of combustion and emission for a hydrogen (H 2)-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. • Effects of water injection on a hydrogen-fueled engine is studied. • Varied amounts and injection timing of water are considered. • Water injection has significant effects on engine performances. • Early water injection timing has positive effects on the reduction of NOx. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROGEN as fuel
*THERMAL efficiency
*WATER
*HYDROGEN
*NITROGEN oxides
Subjects
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 45
- Issue :
- 24
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 142870114
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2020.03.011