Performance and emissions of coal-fueled engines using group combustion theory: Interim topical report, 1986-1987

Technical Report · Sun Nov 01 00:00:00 EST 1987

OSTI ID:5257608

Annamalai, K; Caton, J A; Roth, J; Ryan, W; Schmidt, J

A literature review describes the development of interactive and group combustion (GC) studies, the bubble combustion (BC) model, the pulverized coal gasification and combustion (PCGC) model for burners, the packet combustion (PACC) model for engines, and various NO/sub x/ models. The group combustion (GC) model for a cloud of coal-water slurry drops in a confined volume is described with correction factors. The heat transfer model is given with results for nodal temperatures of cylinder head utilizing iron componet through an engine cycle. The NO/sub x/ model is also given with incorporation into the PACC model;results are given for NO/sub x/ emissions as a function of crank angle, injection timing, inlet manifold temperature etc. Results from the GC model are currently being incorporated in the PACC model. The correction factor from the nonsteady GC model varies from 0.2 to 0.1. Pressure vs time plot confirms GE bomb reactor data. Ignition starts as a heterogeneous process, leading to pyrolysis and the heterogeneous and homogeneous combustion of volatiles. In the preliminary results of the heat transfer model, the temperature swing of interior node of cylinder head is 20)degree)K for insulated case and 35)degree)K for the iron case. The engine cycle simulation for coal-fueled, reciprocating, internal combustion engines is expanded to include calculations of NO exhaust emissions. Calculations have been completed for a coal-wate slurry fuel. Engine performance parameters are in good agreement with published values. Computed exhaust NO concentrations for both diesel and coal-water slurry fuels are in fair agreement with preliminary experiment. In general, the exhaust NO concentrations are lower for the coal-water slurry fuel relative to the diesel fuel. The thermal NO production for the coal-water slurry fuel is a strong function of the coalwater mass ratio. The NO from fuel-bound nitrogen could be significant for coal-water slurry fuels. 52 figs., 14 tabs.

• Research Organization: Texas A and M Univ., College Station (USA). Dept. of Mechanical Engineering
• DOE Contract Number: AC21-86MC23265
• OSTI ID: 5257608
• Report Number(s): DOE/MC/23256-2565; ON: DE88001065
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
DIESEL ENGINES
COMBUSTION
FUEL SLURRIES
AEROSOLS
BUBBLES
COAL
DROPLETS
EXHAUST GASES
NITRIC OXIDE
WATER
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
ENERGY SOURCES
ENGINES
FLUIDS
FOSSIL FUELS
FUELS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROGEN COMPOUNDS
INTERNAL COMBUSTION ENGINES
MATERIALS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SLURRIES
SOLS
SUSPENSIONS
THERMOCHEMICAL PROCESSES
WASTES
330102* - Internal Combustion Engines- Diesel
014000 - Coal
Lignite
& Peat- Combustion
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)