Experimental study of methane fuel oxycombustion in an SI engine

Van Blarigan, Andrew and Kozarac, Darko and Seiser, Reinhard and Chen, Jyh-Yuan and Cattolica, Robert and Dibble, Robert (2012) Experimental study of methane fuel oxycombustion in an SI engine. = Experimental study of methane fuel oxycombustion in an SI engine. In: ASME 2012 Internal Combustion Engine Division Fall Technical Conference, ICEF 2012, 23-26. 9. 2012., Vancouver, BC; Canada.

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Abstract

An experimental investigation of the thermal efficiency, combustion efficiency, and CoV IMEP, of methane fuel oxycom-bustion in an SI engine has been carried out. Compression ratio, spark-timing, and oxygen concentration were all varied. A variable compression ratio SI engine was operated on both wet and dry EGR working fluids, with results illustrating that the efficiency of the engine operating with a large amount of EGR was significantly reduced relative to methane-in-air operation over all oxygen concentrations and compression ratios. The maximum thermal efficiency of wet EGR, dry EGR, and air was found to be 23.6%, 24.2%, and 31.4%, respectively, corresponding to oxygen volume fractions of 29.3%, 32.7% and 21%. Combustion efficiency was above 98% for wet EGR and approximately 96% for dry EGR. CoV IMEP was low for both cases. The much lower efficiency of both EGR cases relative to air is primarily a result of the reduced specific-heat ratio of the EGR working fluids relative to air working fluid. Copyright © 2012 by ASME.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): Combustion efficiencies; Experimental investigations; Large amounts; Oxy combustions; Oxygen concentrations; Oxygen volume; Thermal efficiency; Variable compression ratio; Compression ratio (machinery); Fluids; Internal combustion engines; Methane; Oxygen; Engines
Subjects: TECHNICAL SCIENCE
Divisions: 400 Department of IC Engines and Mechanical Handling Equipment > 410 Chair of IC Engines and Motor Vehicles
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 24 Apr 2015 09:33
Last Modified: 02 Mar 2017 16:54
URI: http://repozitorij.fsb.hr/id/eprint/3993

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