Impact of propane energy fraction on diesel-ignited propane dual fuel low temperature combustion

This paper focuses on quantifying the effects of percent energy substitution of propane on Diesel-ignited Propane Dual Fuel Low Temperature Combustion (DPDFLTC) performed in a single cylinder research engine (SCRE). All the experiments were performed with the engine load and speed held constant at 1...

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Bibliographic Details
Published inFuel (Guildford) Vol. 209; pp. 769 - 775
Main Authors Hodges, Kyle A., Aniello, Andrea, Krishnan, Sundar Rajan, Srinivasan, Kalyan Kumar
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.12.2017
Elsevier BV
Subjects
Carbon monoxide
Combustion
Cylinders
Diesel
Diesel fuels
Dual fuel
Emissions
Energy
Injection
Injection timing
Knock
Low temperature
Low temperature combustion
NOx emissions
Pressure
Propane
RCCI, Propane
Smoke
Temperature effects
BDC
HCCI
MPRR
BTDC
CA10-90
TDC
CA5
NOx
ID
LHV
IFCE
EOI
Low temperature combustion
FSN
CA50
SOC
CAD
BMEP
COV
Dual fuel
ATDC
CO
SOI
IMEP
Injection timing
EGR
RCCI
NOx emissions
Pin
AHRR
LTC
HC
RCCI, Propane
Prail
PES
ηcomb
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Summary:This paper focuses on quantifying the effects of percent energy substitution of propane on Diesel-ignited Propane Dual Fuel Low Temperature Combustion (DPDFLTC) performed in a single cylinder research engine (SCRE). All the experiments were performed with the engine load and speed held constant at 1500rev/min and 3.3bar BMEP, respectively. The intake pressure and temperature were held constant at 150kPa and 30°C, respectively, the diesel injection timing and injection pressure were maintained at 310 CAD (50deg. BTDC) and 500bar, while the propane energy fraction (PEF) was varied throughout the experiment. The results indicate that the maximum PEF was limited by to 90% due to high cyclic combustion variability (COV imep∼11%), and the minimum PEF was limited to 53% due to onset of engine knock (MPRR∼10.5bar/deg). Additionally, the engine-out unburned hydrocarbon emissions decreased from nearly 40g/kWh at 90%PEF to about 10g/kWh at 53% PEF, the engine-out carbon monoxide emissions decreased from nearly 30g/kWh 90% PEF to about 5g/kWh at 53% PEF and the engine-out nitrogen oxide emissions increased from 0.1g/kWh 90% PEF to 1.5g/kWh at 53% PEF; whereas, engine-out smoke emissions remained low throughout the experimental program.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2017.07.096