Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5012878 | Energy Conversion and Management | 2017 | 11 Pages |
Abstract
Literature demonstrates that, for premixed low temperature combustion concepts, particulate matter cannot be directly extrapolated from soot emissions measurements, as typically done for conventional diesel combustion. This is because the particulate matter from low temperature combustion has low fraction of carbonaceous compounds and great amount of soluble organic fraction, which is not captured by the smoke measurement techniques such as the optical reflectometry. By this reason, the study of the particulate matter characteristics from this combustion techniques requires using specific equipment. The aim of the current work is to gain understanding on the particulate matter characteristics from the dual-mode dual-fuel combustion, which is an optimized combustion strategy that combines fully and highly premixed RCCI regimes at low and medium loads, and switches to dual-fuel diffusion combustion at full load. The study was performed over the whole engine map, using a 15.3:1 compression ratio medium-duty EURO VI diesel engine. In particular, the particulate number and size distributions were sampled using a scanning mobility particle sizer and a condensation particle counter, which allow measuring the size distribution and total number of particles from 5 to 250Â nm. Results demonstrate that the fully premixed RCCI combustion is dominated by small particles (less than 30Â nm in mobility diameter), the dual-fuel diffusion mode is dominated by larger particles (around 100Â nm in mobility diameter) showing more diesel-like particle size distributions, and the highly premixed reactivity controlled compression ignition regime shows a transitional particle size distribution with two peaks of mobility diameters around 20 and 80Â nm.
Keywords
CA50HCCILTCDOCRCCIASTMPFIMCEECUSOFDMDFIVCIMEPSCEPPCPRRFSNDPFPSDCDCCPCpartially premixed chargeEGRCA10IVOSMPSaTDCGasoline fractionBDCDMANOxReactivity controlled compression ignitionCOVLow temperature combustionDual-fuel combustionConventional diesel combustionAmerican Society of Testing and MaterialsEvoNitrogen oxidesEfficiencyafter top dead centerDifferential Mobility Analyzerport fuel injectionOctane numberParticle size distributionScanning mobility particle sizercrank angle degreeexhaust valve openintake valve openDual-modeCarbon dioxideRoHRHomogeneous Charge Compression IgnitionSOCStart of combustionCondensation Particle CounterFilter Smoke Numberintake valve closeCoefficient of VariationCADDiesel particulate filterBottom Dead Centercarbon monoxideSingle cylinder enginePressure rise rateRate of heat releaseCompression ratioIndicated mean effective pressureAIMHydrocarbonselectronic control unitdiesel oxidation catalystSelective catalytic reductionCO2Soluble organic fractionexhaust gas recirculationSCR
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Jesús Benajes, Antonio GarcÃa, Javier Monsalve-Serrano, Vicente Boronat,