The prospects of reduced emission, improved efficiency, stable, and oscillation-free combustion, and reduced construction costs achieved by an “Inverted Brayton Cycle” applied to midsize (0.5 to 5.0 MWe) power plants are discussed. In this cycle, the combustion products of an atmospheric pressure combustor are expanded in the gas turbine to subatmospheric pressure and following heat extraction are compressed back to slightly above the atmospheric, sufficient to enable a controlled fraction of the exhaust gas to be recirculated to the combustor. Due to the larger volume flow rate of the gas, the polytropic efficiency of both the turbine and compressor of this small machine is increased. Because of the low operating pressure and flue gas recirculation, both of which are instrumental to low formation, the combustor can be operated in the diffusion flame mode; this, on the other hand, assures good flame stability and oscillation-free combustion over wide ranges of the operating variables. For the task of obtaining very low formation, the well-tested multi annular swirl burner (MASB) is chosen. Recent computational and experimental development of the MASB by Siemens-Westinghouse as a topping combustor is discussed. It is shown that the MASB operated in rich-quench-lean mode is capable of single-digit emission. The emissions are further lowered in the APGC by ambient pressure combustion, and by the injection of the recirculated gas in the quench zone of the combustor. Results of a computational optimization study of the ambient pressure gas turbine cycle (APGC) are presented.
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January 2003
Technical Papers
Low Emission From an Ambient Pressure Diffusion Flame Fired Gas Turbine Cycle (APGC)
G. Vermes, Consultant,,
G. Vermes, Consultant,
1460 Elm Street, Stratford, CT 02139
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L. E. Barta,
L. E. Barta
Combustion Consultants International, Inc., Bu¨kko¨s Part 72, Szentendre, Hungary
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J. M. Bee´r
J. M. Bee´r
Massachusetts Institute of Technology, Building 66, Room 548, Cambridge, MA 02139
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G. Vermes, Consultant,
1460 Elm Street, Stratford, CT 02139
L. E. Barta
Combustion Consultants International, Inc., Bu¨kko¨s Part 72, Szentendre, Hungary
J. M. Bee´r
Massachusetts Institute of Technology, Building 66, Room 548, Cambridge, MA 02139
Contributed by the Combustion and Fuels Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received by the C&F Division Aug. 2001; final revision received by the ASME Headquarters June 2002. Associate Editor: P. Malte.
J. Eng. Gas Turbines Power. Jan 2003, 125(1): 46-50 (5 pages)
Published Online: December 27, 2002
Article history
Received:
August 1, 2001
Revised:
June 1, 2002
Online:
December 27, 2002
Citation
Vermes, G., Barta, L. E., and Bee´r, J. M. (December 27, 2002). "Low Emission From an Ambient Pressure Diffusion Flame Fired Gas Turbine Cycle (APGC) ." ASME. J. Eng. Gas Turbines Power. January 2003; 125(1): 46–50. https://doi.org/10.1115/1.1520160
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