Combustion characteristics of coal fuel in adiabatic diesel engines: Final report

Technical Report · Sat Aug 01 04:00:00 EDT 1987

OSTI ID:6948381

Likos, W E; Ryan, III, T W

The combustion of 50 wt % coal slurries, using water, diesel fuel, and methanol as carrier liquids, was investigated in a single-cylinder research engine. Preliminary data on the engine performance of dry powder coal, injected at high pressure into the engine, were also obtained. High temperatures were achieved in the engine cylinder using low-heat rejection engine technology, electrically heated glow plugs, and heated inlet air. Five coal-derived liquids, representing various low-cost processing technologies, were also evaluated for potential use as fuels in a variable compression ratio single-cylinder engine. Comparisons of the different fuels and methods of providing additional cylinder heat were obtained from cylinder pressure data and heat release calculations. Conclusions are: Autoignition of coal/water and coal/diesel slurries are possible in a medium speed diesel engine. Burning rates of the autoignited slurries could be significantly enhanced by a pilot injection of diesel fuel. Thermal efficiencies of the coal/water slurry equaled the base diesel fuel under some conditions. Engines designed for coal slurry should have the prechamber volume maximized. The Great Plains Naphtha is the best selection as a diesel fuel blending stock of the fuels tested when the ease of blending into diesel fuel, and engine performance are considered. 27 refs., 80 figs., 21 tabs.

• Research Organization: Southwest Research Inst., San Antonio, TX (USA). Fuels and Lubricants Research Div.
• DOE Contract Number: AC21-84MC21384
• OSTI ID: 6948381
• Report Number(s): DOE/MC/21384-2528; ON: DE88001021
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
33 ADVANCED PROPULSION SYSTEMS
330102* -- Internal Combustion Engines-- Diesel
330800 -- Emission Control-- Alternative Fuels
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COAL LIQUIDS
COMBUSTION
COMBUSTION PROPERTIES
DESIGN
DIESEL ENGINES
DIESEL FUELS
DISPERSIONS
DOCUMENT TYPES
EFFICIENCY
ENERGY SOURCES
ENGINES
FLUIDS
FOSSIL FUELS
FUEL SLURRIES
FUEL SUBSTITUTION
FUELS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LIQUIDS
MATERIALS
MIXTURES
MODIFICATIONS
OXIDATION
PARTICLE SIZE
PERFORMANCE
PETROLEUM PRODUCTS
POWDERS
PROGRESS REPORT
RESEARCH PROGRAMS
SIZE
SLURRIES
SUSPENSIONS
THERMAL EFFICIENCY
THERMOCHEMICAL PROCESSES