Operating Results of the Cooper-Bessemer JS-1 Engine on Coal–Water Slurry

1988 ◽  
Vol 110 (3) ◽  
pp. 431-436 ◽  
Author(s):  
A. K. Rao ◽  
C. H. Melcher ◽  
R. P. Wilson ◽  
E. N. Balles ◽  
F. S. Schaub ◽  
...  
Keyword(s):  
Air Temperature ◽  
Engine Performance ◽  
Nox Emissions ◽  
Hole Size ◽  
Successful Operation ◽  
Water Slurry ◽  
Injector Nozzle ◽  
Coal Water Slurry ◽  
Pilot Fuel ◽  
Nozzle Hole

Successful operation of the Cooper-Bessemer JS-1 engine on coal–water slurry (CWS) fuel has been achieved at full power output, part load, and part speed conditions with varying degrees of diesel pilot fuel including zero pilot (auto-ignition of CWS). Selected results of the effect of pilot fuel quantity, pilot fuel timing, and manifold air temperature on engine performance are presented. Also, the influence of injector nozzle hole size and CWS mean particle size on engine performance is studied. High injection pressures resulted in good atomization of CWS and in combination with heated combustion air resulted in short ignition delays and very acceptable fuel consumption. Low CO/CO2 ratios in exhaust gas analysis confirmed good combustion efficiency. NOx emissions are compared for CWS and diesel fuel operation of the engine. Effect of injector nozzle hole size and manifold air temperature on NOx emissions is studied.

Progress on the Investigation of Coal-Water-Slurry Fuel Combustion in a Medium-Speed Diesel Engine: Part 3—Accumulator Injector Performance

1989 ◽  
Vol 111 (3) ◽  
pp. 516-520 ◽  
Author(s):  
B. D. Hsu ◽  
G. L. Leonard ◽  
R. N. Johnson
Keyword(s):  
Diesel Engine ◽  
Engine Performance ◽  
Diesel Oil ◽  
Fuel Combustion ◽  
Injection System ◽  
Water Slurry ◽  
Medium Speed ◽  
Engine Part ◽  
Coal Water Slurry

Coal-water-slurry (CWS) engine tests designed to evaluate a new accumulator-based injection system are described in this paper. The new injection system was found to improve CWS burnout considerably at both full and part engine loads. The peak cylinder firing pressure when operating with CWS was no higher than when operating with diesel oil. These data demonstrate the improved engine performance that can be achieved with the accumulator-based injection system.

Combustion of Coal-Water Slurry in a Two-Cycle Diesel Engine: Effects of Fuel Amount and Timing

1990 ◽  
Vol 112 (3) ◽  
pp. 376-383 ◽  
Author(s):  
T. Uzkan ◽  
C. E. Horton
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Cylinder Pressure ◽  
Release Rates ◽  
Energy Of Combustion ◽  
Water Slurry ◽  
Coal Particles ◽  
Coal Water Slurry ◽  
Temperature Heat ◽  
Pilot Fuel

Coal-water slurry having micronized coal particles with approximately 50 percent coal loading is successfully ignited and combusted in one cylinder of a two-cylinder 645 EMD engine by using diesel fuel pilot ignition aid. The effects of three different parameters, namely, (a) pilot timing, (b) pilot amount, and (c) CWS fuel amount, are investigated in detail. The physical trends of combustion under single parametric variations are presented in terms of the cylinder pressure, temperature, heat release rates, and cumulative heat release curves. CWS combustion with less than 5 percent of the energy of combustion coming from pilot fuel is achieved.

Low Solids Coal Water Slurry Cofiring for NOx Trim

2002 ◽  
Author(s):  
Joseph J. Battista ◽  
Evan E. Hughes
Keyword(s):  
Catalytic Reduction ◽  
Department Of Energy ◽  
Environmental Research ◽  
Coal Waste ◽  
Nox Emissions ◽  
Water Slurry ◽  
Coal Cleaning ◽  
Coal Water Slurry ◽  
Penn State ◽  
Combustion Tests

Over the past decade, members of the Upgraded Coal Interest Group and EPRI, the Department of Energy, the Energy and Environmental Research Corporation (GE-EER), Washington Energy Processing (WEP), Penn State University and the previous owners and operators of Seward Station located in western Pennsylvania, conducted a series of formulation and combustion tests using coal waste fines as a low solids coal water slurry cofiring fuel for electric power generation. The fine coal was recovered from coal fines impoundments and fresh coal cleaning plant fines that were cleaned, thickened and then cofired with pulverized coal in utility scale boilers. This paper explains the need for a program to eliminate these impoundments and describes the results of some of the tests conducted on the technology that demonstrate the effectiveness of trimming NOx emissions by the use of slurry cofiring. This method of trimming NOx emission has been shown to have the capability of reducing NOx emissions by 20% to 35% below the levels achieved by some low NOx burners and selective non-catalytic reduction systems (SNCRs).

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