A computational study of operating range extension in a natural gas SI engine with the use of hydrogen

Gharehghani, A. and Hosseini, R. and Mirsalim, M. and Yusaf, Talal F. (2015) A computational study of operating range extension in a natural gas SI engine with the use of hydrogen. International Journal of Hydrogen Energy, 40 (17). pp. 5966-5975. ISSN 0360-3199


The performance of a natural gas fueled spark ignition engine was studied to investigate the effect of hydrogen enrichment on the engine operating range and combustion characteristics. A validated multi-dimensional CFD model coupled with detailed chemical kinetics mechanism was used to study the combustion process in Hydrogen/CNG engine. Results indicated that misfiring occurs in equivalence ratios of about 0.61, 0.48 and 0.42 for hydrogen fractions of 0%, 30% and 50% respectively. Also, combustion durations were 70, 47 and 45 degrees crank angle for hydrogen fractions of 0%, 30% and 50% respectively with same equivalence ratio (Ф ¼ 0.625). Regarding the emission, the maximum amount of break specific NOx was detected around Ф ¼ 0.83 (l ¼ 1.2), and this point is almost independent of
the hydrogen fraction. It was found that hydrogen fraction decreases the emissions of CO, and HC and CO2. Adding 30% hydrogen reduced CO2 emission by10.2% while 50% hydrogen fraction led to 22.7% CO2 reduction.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher's copyright restrictions.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 02 Nov 2015 04:51
Last Modified: 27 Jul 2016 00:55
Uncontrolled Keywords: natural gas fueled engine; hydrogen enrichment; combustion duration; CO2 reduction
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
Identification Number or DOI: 10.1016/j.ijhydene.2015.03.015
URI: http://eprints.usq.edu.au/id/eprint/27786

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