7F DLN2.6+ Combustor - Combustion Turbine Operations ... · PDF file27.10.2015 ·...

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Imagination at work

GE Power & Water

CTOTF FALL CONFERENCE | COEUR D'ALENE, IDAHO | SEPTEMBER 20-24, 2015

7F DLN2.6+ Combustor Karthik Subramanian, Regional Application Engineer September 23, 2015


© 2015, General Electric Company.

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All relative statements are with respect to GE technology unless otherwise noted. 2 2


7F DLN2.6+ combustor overview

Agenda:

DLN2.6+ overview and status

Performance features

Durability features


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Capability

• 7F.03, .04 and .05

• Enhances AGP and .05 compressor uprate performance

• Improves flexibility and availability

– 32,000 hours/1,250 starts CI

– Fuel flexibility, +/-15% MWI range, 25% Ethane

– Extended turndown by 8-10% points

• As low as < 5ppm NOx emissions

Scope of supply

Combustion: End covers, fuel nozzles, combustion casings, cap assembly, liners, transitions pieces (potential DLN2.6 re-use), flow sleeves, and cross-fire tubes

Accessories: Same accessories skid as DLN2.6e. Flex hoses, ring manifolds, cooling and sealing air piping, gas control valves within skid replaced as necessary

Controls: Mark* VIe for Autotune/ETS

*Trademark of General Electric Company.

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Swirl Vane Integral with Fuel Injection

Burner Tube Integral with Swirl Vane Casting

Inlet Flow Conditioning

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Architecture drawn from 9F series experience: • 9FB experience at 2,600F+ Tfire – NOx, dynamics, hardware thermal capability • Swozzles for fuel flexibility – LNG, shale gas, wide wobbe

9F swozzle 7F DLN2.6 swirler/peg

F-class enhancements - Integrated premixed pilots • Improved stability for low NOx and turndown • Displaces quaternary fuel circuit


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7FA DLN2.6+ combustor overview

Major feature comparisons:

7FA 2.6+ 9F DLN 2.6+ 7FA DLN 2.6 7FB DLN 2+

Fuel circuits 4 3 or 4 4 4

PM1, PM2, PM3, Pilot PM1, PM2, PM3, D5(opt) PM1, PM2, PM3, Quat PM1, PM3i, PM3o, D4

Fuel nozzle Swozzle Swozzle Swirler/Peg Swozzle

5 around 1 5 around 1 5 around 1 4 around 0

Endcover Welded Welded Brazed Welded

Liner 18.5" N263 with Super B 18.5" N263 with Super B 18" N263 with Super B 17" N263 with Super B

Transition piece

N263 with Super B N263 with Super B N263 with Super B N263 with Super B

Cap Effusion Cooled Hast-x Effusion Cooled Hast-x Effusion Cooled Hast-x Effusion Cooled Hast-x


4 gas fuel circuits for low emissions and dynamics

through operating envelope

Head end flow path enhanced for improved

premixing and lower pressure drop

Fuel nozzles: Integrated Burner Tube for reduced air leakage,

improved emissions and fuel flexibility

Outer FN: Premixed pilot improves lean stability for

lower NOx and improved turndown

Flow sleeve: Improved for cooling while

maintaining low

pressure drop

7F DLN2.6+ performance enhancements

Shorter liner: NOx reduction

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Endcover all-welded construction

Cap: Baffle reduces dynamics

Cap effusion plate: 9FB demonstrated durability

Outer FN: Premixed pilot reduces

dynamics, improves HCF life Common 7FA.04

7FA.05 32k TP

Forward and aft casings: No fillet welds for higher

LCF life

Endcover connections: robust welds

Flow sleeve:

Improved cooling pattern, wear coated piston ring

7F DLN2.6+ durability enhancements

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DLN2.6+ experience

As of 07/01/2015 Total Fleet leader

DLN 2.6+ fleet summary Active units Hours Starts Hours Starts

9FA total

Total 41 888k 16k 40k 955

Gas only 31 661k 14k 40k 955

Dual fuel 10 227k 2k 25k 249

9FB total

Total 39 718k 15k 47k 897

Gas only 26 365k 9k 41k 897

Dual fuel 13 353k 6k 47k 843

DLN 2.6+ total 80 1.6M 31k



• New product development started in ‘10

• Builds upon proven 9F DLN2.6+ layout

• Extensive lab testing to evaluate prototype and production layouts over extreme conditions

• First fielded system achieved COD June 1, ‘15

– Characterization - 186 sensors on 2 cans

– 22 dynamic and 12 static pressure taps

– 116 thermocouples and 36 accelerometers

– ~ 10 day run to evaluate ignition/crossfire, start-up emissions, acceleration and load rate tests, part

load, base load, peak-firing, split mapping,

Autotune commissioning

• Field testing/validation yielded excellent results

• > 50 starts and ~500 hours experience

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7F DLN2.6+ status


• First system COD June ‘15 … excellent results

• Integrated system approach in 7F.03/.04/.05 cycles … combustor, compressor, turbine, controls, generator, BOP

• Increased performance and durability compared to DLN2.6

• Performance and durability improved through: – 9F DLN2.6+ fleet experience/data assessment

– Analysis and modeling enhancements

– Component testing, combustion fired testing and

gas turbine instrumented characterization

7F DLN2.6+ summary


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7F DLN2.6+ Combustor - Combustion Turbine Operations ... · PDF file27.10.2015 ·...

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