The Development of a Dry Low NOx Combustion System for the EGT Typhoon

Kowkabi, M.; Noden, Richard; Pietro, Simon De

doi:10.1115/97-gt-060

Cited by 12 publications

(11 citation statements)

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“…SITL DLE combustion technology is applied across the range of small-scale industrial gas turbines from 5MW to 15 MW (SGT-100 to SGT-400) [12,24,32]. The operational experience on these DLE engines has accumulated more than 20 x 10*h. Figure 1 shows the schematic view of the SITL DLE combustor.…”

Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

“…Tbe radial swirled DLE combustor design is sufficient to generate high swirl number, greater tban 0.6 for a typical gas turbine combustor, to create a vortex breakdown reverse flow feature along tbe axis of tbe combustor [12,24,32]. Tbis flow feature is called as intemal reverse flow zone or central recirculation zone (CRZ).…”

Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

“…Firstly, tbe main injection, which has a bigb degree of premixing and hence low NOx emissions and secondly the pilot, which is increased steadily as tbe load demand decreases, in order to ensure flame stability [12,24,32]. Firstly, tbe main injection, which has a bigb degree of premixing and hence low NOx emissions and secondly the pilot, which is increased steadily as tbe load demand decreases, in order to ensure flame stability [12,24,32].…”

Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

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Effect of Change in Fuel Compositions and Heating Value on Ignition and Performance for Siemens SGT-400 Dry Low Emission Combustion System

Liu¹,

Martin²,

Sanderson³

et al. 2013

Journal of Engineering for Gas Turbines and Power

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The influence of changes in fuel composition and heating value on the performance of an industrial gas turbine combustor was investigated. The combustor tested was a single cannular combustor for Siemens SGT-400 13.4 MW dry low emission engine. Ignition, engine starting, emissions, combustion dynamics, and flash back through burner metal temperature monitoring were among the parameters investigated to evaluate the impact of fuel fiexibility on combustor performance. Lean ignition and extinction limits were measured for three fuels with different heat values in term ofWobbe Index (WI): 25, 28.9, and 45 MJISm (natural gas). The test results show that the air fuel ratio at lean ignition/ extinction limits decreases and the margin between the two limits tends to be smaller as fuel heat value decreases. Engine start tests were also performed with a lower heating value fuel and results were found to be comparable to those for engine starting with natural gas. The combustor was further tested in a high pressure air facility at real engine operating conditions with different fuels covering WIsfrom 17.5 to 70MJISm^. The variation in fuel composition and heating value was achieved in a gas mixing plant by blending natural gas with CO2, CO, N2, and H2 (for the fuel with WI lower than natural gas) and CjHg (for the fuel with WI higher than natural gas). Test results show that a benefit in NO^ reduction can be seen for the lower WI fuels without H2 presence in the fuel and there are no adverse impacts on combustor performance except for the requirement of higher fuel supply pressure, however, this can be easily resolved by minor modification through the fuel injection design. Test results for the H2 enriched and higher WI fuels show that NOx, combustion dynamics and flash back have been adversely affected and major change in burner design is required. For the H2 enriched fuel, the effect of CO and H2 on combustor performance was also investigated for the fuels having a fixed WI of 29MJISm^. It is found that H2 dominates the adverse impact on combustor performance. The chemical kinetic study shows that H2 has significant effect on flame speed change and CO has significant effect on flame temperature change. Although the tests were performed on the Siemens SGT-400 combustion system, the results provide gener-al guidance for the challenge of industrial gas turbine burner design for fuel flexibility.

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Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

Section: Sitl Dle Combnstor Systemmentioning

confidence: 99%

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Effect of Change in Fuel Compositions and Heating Value on Ignition and Performance for Siemens SGT-400 Dry Low Emission Combustion System

Liu¹,

Martin²,

Sanderson³

et al. 2013

Journal of Engineering for Gas Turbines and Power

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“…5MW to the SGT-400 at 13.4MW [3][4][5]. In order to cover this power range, rather than having a single combustor design and applying different numbers of combustors to each engine type, the combustors have been scaled.…”

Section: The Dle Combustormentioning

confidence: 99%

“…The measurement equipment is in compliance with ISO11042 and the basic description of the employed technique is presented in [3]. The manufacturing brochures of the analysers used are presented in [7][8].…”

Section: Emissions Measuring Equipmentmentioning

confidence: 99%

Active Control of Fuel Splits in Gas Turbine DLE Combustion Systems

Bulat

Skipper

McMillan

et al. 2007

Volume 2: Turbo Expo 2007

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This paper presents a system for the active control of the fuel split within a two-stream Dry Low Emissions (DLE) gas turbine. The system adjusts the fuel split based upon the amplitude of combustor pressure fluctuations and burner metal temperature. The active control system, its implementation and its performance during engine tests on Siemens SGT-200 is described.The paper describes the active fuel split control algorithm. Engine test results are then presented for steady and transient loads with different rates of change of the engine operation temperature, including rapid load acceptance and load shedding. Additionally, cycling operating conditions were tested to evaluate the performance of the algorithm in typical island mode and mechanical drive applications. The active control algorithm was successful in providing stable and reliable control of the turbine allowing very low emissions levels to be attained without manual intervention. In fact it allows areas to be reached that until now were excluded. The impact of operational parameter changes (e.g. load change, ambient temperature, fuel composition etc.) on the engine operability proved the active control software's ability to respond seamlessly. In addition, it prevented flameout and/or high pressure fluctuation while keeping burner temperatures within limits. Recorded emissions showed a reduction in NOx was achieved when the fuel split was controlled by the algorithm compared to standard operation. This was a direct result of the algorithm successfully identifying the lean stability limit and operating close to it.

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Prediction and control of combustion instabilities in industrial gas turbines

Kelsall¹,

Troger

2004

Applied Thermal Engineering

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The Development of a Dry Low NOx Combustion System for the EGT Typhoon

Cited by 12 publications

References 0 publications

Effect of Change in Fuel Compositions and Heating Value on Ignition and Performance for Siemens SGT-400 Dry Low Emission Combustion System

Effect of Change in Fuel Compositions and Heating Value on Ignition and Performance for Siemens SGT-400 Dry Low Emission Combustion System

Active Control of Fuel Splits in Gas Turbine DLE Combustion Systems

Prediction and control of combustion instabilities in industrial gas turbines

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