This paper describes experimental work performed at General Electric, Global Research Center to evaluate the performance and understand the risks of using dry low (DLN) technologies in exhaust gas recirculation (EGR) conditions. Exhaust gas recirculation is viewed as an enabling technology for increasing the concentration of the flue gas while decreasing the volume of the postcombustion separation plant and therefore allowing a significant reduction in capture cost. A research combustor was developed for exploring the performance of nozzles operating in low environment at representative pressures and temperatures. A series of experiments in a visually accessible test rig have been performed at gas turbine pressures and temperatures, in which inert gases such as were used to vitiate the fresh air to the levels determined by cycle models. Moreover, the paper discusses experimental work performed using a DLN nozzle used in GE’s F-class heavy-duty gas turbines. Experimental results using a research combustor operating in a partially premixed mode include the effect of EGR on operability, efficiency, and emission performance under conditions of up to 40% EGR. Experiments performed in a fully premixed mode using a DLN single nozzle combustor revealed that further reductions in could be achieved while at the same time still complying with CO emissions. While most existing studies concentrate on limitations related to the minimum oxygen concentration (MOC) at the combustor exit, we report the importance of levels in the oxidizer. This limitation is as important as the MOC, and it varies with the pressure and firing temperatures.
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Application of Exhaust Gas Recirculation in a DLN F-Class Combustion System for Postcombustion Carbon Capture
Ahmed M. ElKady,
Ahmed M. ElKady
General Electric,
Global Research Center
, Niskayuna, NY 12309
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Andrei Evulet,
Andrei Evulet
General Electric,
Global Research Center
, Niskayuna, NY 12309
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Anthony Brand,
Anthony Brand
General Electric,
Global Research Center
, Niskayuna, NY 12309
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Tord Peter Ursin,
Tord Peter Ursin
StatoilHydro ASA,
Technology and New Energy
, N-4035 Stavanger, Norway
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Arne Lynghjem
Arne Lynghjem
StatoilHydro ASA,
Technology and New Energy
, N-4035 Stavanger, Norway
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Ahmed M. ElKady
General Electric,
Global Research Center
, Niskayuna, NY 12309
Andrei Evulet
General Electric,
Global Research Center
, Niskayuna, NY 12309
Anthony Brand
General Electric,
Global Research Center
, Niskayuna, NY 12309
Tord Peter Ursin
StatoilHydro ASA,
Technology and New Energy
, N-4035 Stavanger, Norway
Arne Lynghjem
StatoilHydro ASA,
Technology and New Energy
, N-4035 Stavanger, NorwayJ. Eng. Gas Turbines Power. May 2009, 131(3): 034505 (6 pages)
Published Online: February 19, 2009
Article history
Received:
April 7, 2008
Revised:
July 31, 2008
Published:
February 19, 2009
Citation
ElKady, A. M., Evulet, A., Brand, A., Ursin, T. P., and Lynghjem, A. (February 19, 2009). "Application of Exhaust Gas Recirculation in a DLN F-Class Combustion System for Postcombustion Carbon Capture." ASME. J. Eng. Gas Turbines Power. May 2009; 131(3): 034505. https://doi.org/10.1115/1.2982158
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