Efficiency and Emissions Characteristics of an HCCl Engine Fueled by Primary Reference Fuels

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dc.contributor.authorYang, Ruinan
dc.contributor.authorHariharan, Deivanayagam
dc.contributor.authorZilg, Steven
dc.contributor.authorMamalis, Sotirios
dc.contributor.authorLawler, Benjamin
dc.contributor.otherState University of New York (SUNY) System
dc.contributor.otherState University of New York (SUNY) Stony Brook
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2022-01-27T19:03:32Z
dc.date.available2022-01-27T19:03:32Z
dc.date.issued2018
dc.description.abstractThis article investigates the effects of various primary reference fuel (PRF) blends, compression ratios, and intake temperatures on the thermodynamics and performance of homogeneous charge compression ignition (HCCl) combustion in a Cooperative Fuels Research (CFR) engine. Combustion phasing was kept constant at a CA50 phasing of 5 degrees after top dead center (aTDC) and the equivalence ratio was kept constant at 0.3. Meanwhile, the compression ratio varied from 8:1 to 15:1 as the PRF blends ranged from pure n-heptane to nearly pure isooctane. The intake temperature was used to match CA50 phasing. In addition to the experimental results, a GT-Power model was constructed to simulate the experimental engine and the model was validated against the experimental data. The GT-Power model and simulation results were used to help analyze the energy flows and thermodynamic conditions tested in the experiment. The results indicate that an increase of compression ratio causes higher thermal efficiency and fuel conversion efficiency; however, at the same compression ratio, an increase in PRF number results in lower efficiency due to the required increase in intake temperature and the associated decrease in charge density. While the efficiency does increase with compression ratio, the results show that the effect of increased expansion work is partially offset by higher heat transfer losses and lower ratios of specific heats at higher compression ratios. The results indicate that the maximum pressure rise rate (MPRR) in HCCl significantly increases with compression ratio. Combustion efficiency shows a strong trend with peak temperature regardless of the PRF number or compression ratio, indicating that the CO-to-CO2 conversion is independent of the parent fuel chemistry in the case of the PRFs, whereas the unburned hydrocarbon emissions showed the opposite trend, depending mostly on the parent fuel's autoignition tendency.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationYang, R., Hariharan, D., Zilg, S., Lawler, B. et al., "Efficiency and Emissions Characteristics of an HCCI Engine Fueled by Primary Reference Fuels," SAE Int. J. Engines 11(6):993-1006, 2018, https://doi.org/10.4271/2018-01-1255.
dc.identifier.doi10.4271/2018-01-1255
dc.identifier.orcidhttps://orcid.org/0000-0002-6494-4102
dc.identifier.urihttp://ir.ua.edu/handle/123456789/8246
dc.languageEnglish
dc.language.isoen_US
dc.publisherSAE International
dc.subjectHCCl
dc.subjectPrimary Reference Fuel
dc.subjectEfficiency
dc.subjectEmissions
dc.subjectCHARGE COMPRESSION IGNITION
dc.subjectTEMPERATURE COMBUSTION MODE
dc.subjectBIODIESEL FUELS
dc.subjectJATROPHA OIL
dc.subjectHEAT RELEASE
dc.subjectDIESEL
dc.subjectPERFORMANCE
dc.subjectBLENDS
dc.subjectRATIO
dc.subjectTransportation Science & Technology
dc.subjectTransportation
dc.titleEfficiency and Emissions Characteristics of an HCCl Engine Fueled by Primary Reference Fuelsen_US
dc.typetext
dc.typeArticle
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