Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Development and Implementation of the Advanced Environmental Burner for the Alstom GT13E2

[+] Author and Article Information
Klaus Döbbeling

Baden 5401, Switzerland

Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received October 11, 2012; final manuscript received November 12, 2012; published online May 20, 2013. Editor: Dilip R. Ballal.

J. Eng. Gas Turbines Power 135(6), 061503 (May 20, 2013) (11 pages) Paper No: GTP-12-1399; doi: 10.1115/1.4023263 History: Received October 11, 2012; Revised November 12, 2012

Increasing public awareness and more stringent legislation on pollutants drive gas turbine manufacturers to develop combustion systems with low NOx emissions. In combination with this demand, the gas turbines have to provide a broad range of operational flexibility to cover variations in gas composition and ambient conditions along with varying daily and seasonal energy demands and load profiles. This paper describes the development and implementation of the Alstom AEV (advanced environmental) burner, an evolution of the envorinmental (EV) burner. A continuous fuel supply to two fuel stages at any engine load simplifies the operation and provides a fast and reliable response of the combustion system during transient operation of the gas turbine. Increased turndown with low emissions is an additional advantage of the combustion system upgrade.

Copyright © 2013 by ASME
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Fig. 1

Operation modes of the GT13E2 EV burner

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Fig. 2

Advanced environmental (AEV) burner as compared to the EV burner for the GT13E2

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Fig. 3

Design features of the AEV burner

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Fig. 4

Simplified natural gas operation with the AEV burner and permanent front stage fuel

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Fig. 5

Schematic of the EV and AEV fuel supply systems

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Fig. 6

Experimental development process: key validation drivers and outcome from the test and validation carriers

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Fig. 7

Arrangement of the atmospheric single burner combustion rig

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Fig. 8

Lean blow off as a function of the front stage ratio from atmospheric and high-pressure single burner combustion tests

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Fig. 9

Upstream view towards the flame in atmospheric single burner combustion tests

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Fig. 10

NOx emission measured in a single burner test facility at simulated GT13E2 base load conditions: mapping of the firing temperature and front stage ratio in fuel gas operation

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Fig. 11

Overview of the investigated fuel flexibility range in high-pressure combustion tests and available engine experience

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Fig. 12

NOx emission measured in a single burner test facility at simulated GT13E2 base load conditions: influence of C2+ content and N2 dilution in the fuel gas; low FSR

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Fig. 13

Load rejection on the Alstom 56 MW test power plant; fuel gas operation

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Fig. 14

Variation of loading and deloading rates on the Alstom 56 MW testing facility for fuel oil

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Fig. 15

High fogging results on the ALSTOM 56 MW test facility

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Fig. 16

GT13E2 exhaust temperature spreads for gas operation during start-up (top) and at 60% part load (bottom)

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Fig. 17

GT13E2 loading concept and combustor performance with the AEV burner for low LHV gas (37 MJ/kg)

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Fig. 18

GT13E2 long-term operational data with the AEV natural gas operation during cold ambient temperature fluctuations; C2+ < 2%; LHV 49 MJ/kg

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Fig. 19

GT13E2 with the AEV: front stage ratio mapping

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Fig. 20

NOx and CO emissions at base load for the GT13E2 AEV fuel oil operation

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Fig. 21

GT13E2 loading operation concept and combustor performance with the AEV for oil operation




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