MS 6001 Heavy Duty Gas Turbine
6B… unmatched experience • 42 MW… 50/60 Hz • Launched in 1978 • Over 1000 units • Over 47 million operating hours
3,500
• 99% reliability… 97% availability
2,500
• 12,000 hours of continuous operation • Fuel flexible… from refinery gases to crude oil • Low NOx emissions 15ppm
Fired Starts
• Wide range of applications
3,000
Peaking Duty
Cyclic Duty
2,000 1,500 1,000
Base Load
500
0 0
50,000
100,000
150,000
200,000
250,000
Fired Hours
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6B evolution… 30 % increase in output MW
44 42 40 38 36 34 32 30 8 78 81 83 87 95 97 99 7 19 19 19 19 19 19 19 19 3/ GE / February 11, 2010
6B evolution…
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6B Simple cycle performances PG
Output (MW): Efficiency (%):
42.1 32.1
Heat rate (kj/kwh):
11,230
Pressure ratio
11.8
Firing temperature (°C):
1,140
Shaft speed (rpm):
5,163
Exhaust flow (KG/sec):
141.1
Exhaust temperature (°C):
548
ISO conditions - natural gas
5/ GE / February 11, 2010
6B Design Features
• Axial flow exhaust • High performance
• Hot end drive • 2 bearings Not to scale
• • • •
Axial compressor 17 stages IGV Bolted construction
• 10 can annular chambers • Dual fuel capability • 15 ppm NOx (15% 02) with gas fuel
• • • •
3 stage turbine Bolted construction Advanced materials Enhanced cooling
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Gas Turbine Position Orientation
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MS 6001 B DESCRIPTON
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6B Typical layout
Inlet filter
Exhaust stack
Generator
Turbine control compartment
Accessories Gas turbine 9/ GE / February 11, 2010
6B – Turbine support
The base that supports the gas turbine is a structural steel fabrication of welded steel beams and plate 10 / GE / February 11, 2010
INLET CASING
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6B – Inlet Casing
The inner bellmouth is positioned to the outer bellmouth by seven airfoilshaped radial struts and seven axial tiebars 12 / GE / February 11, 2010
Axial Compressor IGV
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Axial Compressor IGV
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Axial Compressor IGV
LVDT
MOOG 15 / GE / February 11, 2010
Magnetic Speed Pickups Control Speed
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Water Washing Manifold
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AXIAL COMPRESSOR
18 / GE / February 11, 2010
6B – Axial Compressor Feature:
Material:
stages
17
Stub Shaft
NiCrMoV
stage of IGV (variable)
1
Compressor Disc
stages of EGV
2
NiCrMoV (stg. 1-15) CrMoV (stg. 16-17)
Pressure Ratio:
11,8
IGV
GTD 450
AIR FLOW (KG/sec):
140
Blade
C 450 (stg. 1-8) AISI 403 (stg.9-17)
SPEED (rpm):
5163
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Axial Compressor assembly
20 / GE / February 11, 2010
Axial Compressor assembly
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6B – Inlet, Compressor, Discharge Casing
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6B – Compressor Casing
The compressor stator blade are mounted into ring segments in the first four stages.
The remaining stages have a square base dovetail and are inserted directly into circumferential grooves in the casing 23 / GE / February 11, 2010
6B – Extraction pockets • • • •
Compressor discharge casing… bleed belt incorporated into casting Extraction system pipework Turbine casing… bosses for pipe flange attachment Second stage nozzle with radiation shield
Fifth stage
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COMBUSTION SYSTEM
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6B – Combustion Section Feature: N° chamber
10
Type
reverse flow
Burner
single, dual fuel
Firing Temperature (°C)
+ 1100
Water injection
available
Steam injection
available
DLN
available
Material: Liner
Hastelloy X + HS188 with Thermal barrier coating
Cap
Hastelloy X + HS188
Crossfire Tube
AISI 304
Transition piece
Nimonic 263 with Thermal barrier coating 26 / GE / February 11, 2010
6B – C.C. Typical Layout Spark Plug Flame Dectors
View looking downstream 27 / GE / February 11, 2010
6B – C.C. Sectional Drawing
28 / GE / February 11, 2010
DLN systems • Proven Dry Low NOx design and experience… –Gas 15 ppm NOx (15%, O2) –Distillate 42 ppm NOx (15%, O2) with water injection
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6B – Liner
Dilution zone Where additional air is mixed with the hot combustion gases
Louver Liner Cap Metering holes at enter of air
Reaction zone
provide a film of air for cooling the walls of the liner and cap
Where the fuel is burned with the combustion air 30 / GE / February 11, 2010
6B – Liner
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Transition Piece
32 / GE / February 11, 2010
6B – Spark Plug and Flame Detector
33 / GE / February 11, 2010
Steam Inj. is available for Wet NOx Reduction
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TURBINE SECTION
35 / GE / February 11, 2010
6B – Turbine Rotor Feature: stages
3
Ratation
counterclockwise
Type
axial flow
SPEED (rpm):
5163
Material: Stub Shaft
CrMoV
Turbine Disc
CrMoV
Nozzle 1°stg
FSX 414
Bucket 1°stg
GTD111
Nozzle 2°stg
GTD222
Bucket 2°stg
IN 738
Nozzle 3°stg
GTD222
Bucket 3°stg
IN 738 36 / GE / February 11, 2010
6B – Turbine Rotor
1° Wheel Turbine
2° Wheel Turbine Spacer
3° Wheel Turbine Spacer 37 / GE / February 11, 2010
6B – First Stage Bucket
• Use existing GTD111DS material… Nickel base alloy material and coating technology • Turbine aerodynamic analysis… New engine operating conditions • Optimised cooling configuration… 16 cooling holes 38 / GE / February 11, 2010
6B – Internal Path cooling
39 / GE / February 11, 2010
6B – Second Stage Bucket • Nickel base alloy material • Enhanced cooling of airfoil • Contoured tip shroud for creep life improvement
40 / GE / February 11, 2010
6B – Spacer
41 / GE / February 11, 2010
6B – First Stage Nozzle • Use existing FSX414 material (cobalt base alloy) • Enhanced cooling of platforms • Improved leakage control with introduction of chordal hinge and additional line seal
42 / GE / February 11, 2010
6B – 2nd Stage nozzle and 3rd Stage nozzle
Second Stage Nozzle Use existing GTD222… nickel base alloy material and coating technology
Third Stage Nozzle 43 / GE / February 11, 2010
6B – Second Stage Shroud Block
44 / GE / February 11, 2010
EXHAUST SECTION
45 / GE / February 11, 2010
6B – Exhaust Frame
46 / GE / February 11, 2010
6B – Exhaust Frame
47 / GE / February 11, 2010
TURBINE BEARINGS
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6B – Turbine Bearings The gas turbine unit contains two main journal bearings used to support the gas turbine rotor. The unit also includes thrust bearings to maintain the rotor-to-stator axial position. These bearings and seals are incorporated in two housings: one at the inlet and one in the exhaust frame. These main bearings are pressure lubricated by fluid supplied from the main lubricating system. The fluid flows through branch lines to an inlet in each bearing housing.
Journal
No.
Class
Type
1
Journal
Elliptical
2
Journal
Elliptical
1
Thrust Load
(Equalizing)
1
Thrust Unloaded
(Non-Equalizing)
Thrust Load
Thrust UnLoad49 / GE / February 11, 2010
6B – No. 1 Bearing
50 / GE / February 11, 2010
6B – No. 1 Bearing
51 / GE / February 11, 2010
6B – Thrust Bearing
52 / GE / February 11, 2010
6B – No. 2 Bearing
53 / GE / February 11, 2010
