Investigation and Optimization of Biodiesel Chemistry for HCCI Combustion

Conference · Sat Jan 01 04:00:00 EST 2011

OSTI ID:1016607

Bunting, Bruce G ^[1]; Bunce, Michael ^[1]; Joyce, Blake ^[1]; Crawford, Robert W ^[2]

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1. ORNL
2. Rincon Ranch Consulting

Over the past 5 years, ORNL has run 95 diesel range fuels in homogene-ous charge compression ignition (HCCI), including 40 bio-diesels and associated diesel fuels in their blending. The bio-diesel blends varied in oxygen content, iodine number, cetane, boiling point distribution, chemical composition, and some contained nitrogen. All fuels were run in an HCCI engine at 1800 rpm, in the power range of 2.5 to 4.5 bar IMEP, using intake air heating for combustion phasing control, and at a compression ratio of 10.6. The engine response to fuel variables has been analyzed statistically. Generally, the engine responded well to fuels with lower nitrogen and oxygen, lower cetane, and lower aromatics. Because of the wide range of fuels combined in the model, it provides only a broad overview of the engine response. It is recommended that data be truncated and re-modeled to obtain finer resolution of engine response to particular fuel variables.

• Research Organization: Oak Ridge National Laboratory (ORNL); Fuels, Engines and Emissions Research Center
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1016607
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
AIR
AROMATICS
BOILING POINTS
CHEMICAL COMPOSITION
CHEMISTRY
COMBUSTION
COMPRESSION
COMPRESSION RATIO
DIESEL FUELS
DISTRIBUTION
ENGINES
HCCI
HEATING
IGNITION
IODINE NUMBER
NITROGEN
OPTIMIZATION
ORNL
OXYGEN
POWER RANGE
RESOLUTION
biodiesel
biofuels
optimization
statistics