A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime
Name:
Revised Manuscript.pdf
Size:
1.447Mb
Format:
PDF
Description:
author's accepted version
Affiliation
Centre de Recherche en Informatique Signal et Automatique de LilleJunia
University of Bedfordshire
Issue Date
2021-02-16
Metadata
Show full item recordAbstract
The European Union (EU) has recently adopted new directives to reduce the level of pollutant emissions from non-road mobile machinery engines. The main scope of project RIVER for which this study is relating is to develop possible solutions to achieve nitrogen-free combustion and zero-carbon emissions in diesel engines. RIVER aims to apply oxy-fuel combustion with Carbon Capture and Storage (CCS) technology to eliminate NOx emissions and to capture and store carbon emissions. As part of this project, a computational fluid dynamic (CFD) analysis has been performed to investigate the effects of oxy-fuel combustion on combustion characteristics and engine operating conditions in a diesel engine under Homogenous Charge Compression Ignition (HCCI) mode. A reduced chemical n-heptane-n-butanol-PAH mechanism which consists of 76 species and 349 reactions has been applied for oxy-fuel HCCI combustion modeling. Different diluent strategies based on the volume fraction of oxygen and a diluent gas has been considered over a wide range of air-fuel equivalence ratios. Variation in the diluent ratio has been achieved by adding different percentages of carbon dioxide for a range from 77 to 83 vol.% in the intake charge. Results show that indicated thermal efficiency (ITE) has reduced from 32.7% to 20.9% as the CO2 concentration has increased from 77% to 83% at low engine loads while it doesn’t bring any remarkable change at high engine loads. It has also found that this technology has brought CO and PM emissions to a very ultra-low level (near zero) while NOx emissions have been completely eliminated.Citation
Mobasheri R, Aitouche A, Peng Z, Li X (2021) 'A numerical study of the effects of oxy-fuel combustion under homogeneous charge compression ignition regime', International Journal of Engine Research, 23 (4), pp.649-660.Publisher
SAGE Publications LtdAdditional Links
https://journals.sagepub.com/doi/10.1177/1468087421993359Type
ArticleLanguage
enISSN
1468-0874ae974a485f413a2113503eed53cd6c53
10.1177/1468087421993359