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Evaluation of synthetic-fuel-character effects on rich-lean stationary-gas-turbine combustion systems. Volume 1. Subscale test program. Final report

Technical Report ·
OSTI ID:6470814
This report describes work on the Evaluation of Synthetic Fuel Character Effects on Rich-Lean Stationary Gas Turbine Combustion Systems. Five fuels, including No. 2 petroleum distillate fuel, SRC II, H-coal, and EDS middle distillates and hydrotreated Paraho shale oil residual were tested in a subscale 5-inch diameter rich-burn/quick-quench staged rich-lean combustor at conditions representative of peak, baseload, part power and off-design ratings of a 30-MW industrial gas turbine. This combustor is based on the design evolved under NASA contracts under which the rich-burn/quick-quench concept was developed. One purpose of the present contract was to expand the fuel property data base and extend the range of operating conditions beyond the two preceding programs. A minimum NO/sub x/ emission level correlated to 15% oxygen of approximately 37 ppm (well below EPA limits) was attained for all of the fuels despite fuel-bound nitrogen (FBN) levels of up to 0.75% by weight, a result similar to that achieved in the previous NASA programs. Sensitivity of No/sub x/ emissions to reduce rich zone residence time was found to be very small compared to results of the previous NASA program. The combustor smoke emissions at baseload conditions depended on fuel properties and ranged between an SAE Smoke Number of 15 to 45. A test with improved fuel preparation resulted in a dramatic reduction in smoke with shale oil residual fuel from an SAE Smoke Number of 40 to 3. A reduction in smoke through improved fuel preparation is consistent with the results of the NASA program. Trends in smoke and liner heating vs fuel properties for rich-lean combustor are similar although not as consistent as those reported for lean combustors.
Research Organization:
United Technologies Corp., South Windsor, CT (USA). Power Systems Div.
OSTI ID:
6470814
Report Number(s):
EPRI-AP-2822-Vol.1; ON: DE83901452
Country of Publication:
United States
Language:
English