Download - Skoda Supercritical Steam Turbine 660 MW
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ŠKODA POWER
Skoda SupercriticalSteam Turbine 660 MW
Jiri FialaHead of Engineering Dept.
Skoda Power s.r.o.
27th of October 2010Vrnjacka Banja - Serbia
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ŠKODA POWER
ŠKODA History
Establishment of the company in 1859
Mr. Emil Škoda, founder of Škoda Works
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ŠKODA POWER
ŠKODA History
Eminent personalities in the history of ŠKODA steam turbines
First steam turbine produced by ŠKODA Works in 1904
Prof. Auguste Rateau
Prof. Aurel Stodola
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ŠKODA POWER
History Slide with Timeline and Key Milestones
• 1904 - First steam turbine 550 HP system Rateau
• 1911 - Turbines or the Rateau system were replaced by turbines of ŠKODA´s own design
• 1932 - Two 23 MW steam turbines with steam reheating
• 1959 - Turboset 110 MW
• 1966 - Turboset 200 MW
• 1976 - Turboset 220 MW for nuclear power plant
• 1978 - Turboset 500 MW
• 1992 - Turboset 1000 MW for nuclear power plant
• 2007 - USC unit 660 MW for Ledvice Power Plant
• 2009 - Company Doosan Heavy Industries & Construction has completed the acquisition ŠKODA POWER s.r.o. and established ŠKODA POWER s.r.o., A Doosan company
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ŠKODA POWER
ULTRASUPERCRITICAL UNITS
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ŠKODA POWER
Comparison of parameters
39,0%
40,0%
41,0%
42,0%
43,0%
44,0%
45,0%
46,0%
47,0%ne
tt ef
ficie
ncy
167 bar538 °C538 °C
250 bar540 °C560 °C
250 bar566 °C566 °C
270 bar580 °C600 °C
285 bar600 °C620 °C
vacuum: 0.045 bar
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ŠKODA POWER
Steam parameters development
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ŠKODA POWER
Power Plant Ledvice, Czech Republic:
Client:Client:CEZ – Czech Republic
EPC :EPC :Skoda Praha Invest
Main Deliveries:Main Deliveries:Boiler – AlstomCoal - lignite – heat content 11 MJ/kg, consumption 460 t/hSteam Turbine – SKODA Power type MTD 70Live steam 265 bars, temp. 597°C/606°C
Project information
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ŠKODA POWER
ŠŠkodakoda Power scope:Power scope:• Condensing turbine MTD 70 - 660 MW• Generator with excitation system• Condensers• LP and HP feed water heating systems• All interconnecting piping, armatures• Control system, instrumentations• Lube oil system• By-passes• DWH system• TG foundation
Project information
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ŠKODA POWER
HBD 660 MW 100% / 18,5°C
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ŠKODA POWER
Škoda steam turbine design
Turbine arrangement :1xHP, 1x double flow IP, 2x double flow LP
Length of turbine 32170 mmWeight incl. main valves approx. 1091 t
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ŠKODA POWER
Concept of USC Steam Turbine Concept of USC Steam Turbine ŠŠKODA DesignKODA Design
• Reliability: new USC turbine 660 MW is derived from successful and proven design of 500 MW – configuration is identical / USC turbine takes over the majority of modules
• High steam temperature is enabled by application of modern heat resisting materials
• Suppliers of basic components – rotor forgings, turbine casings, forgings and castings for turbine valves, material for blades are leading European companies with references from USC units
• Vallourec-Mannesmann, Saarschmiede, Alstom, Böhler…
Škoda steam turbine design
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ŠKODA POWER
Basic Parameters of USC Turbine ŠKODA 660 MW
• Live Steam Pressure / before HP ES valves 27,3 / 26,5 MPa• Live Steam Temperature-
Boiler / before HP ES valves 600 / 597 °C• Steam Flow nominal 468 kg/s (1685 t/h)• Reheat Steam Temperature –
boiler outlet / before IP valves 610 / 606,5 °C• Cooling Water nominal temperature 18,5 °C• Electrical Output 660 MW• Speed 3000 rpm• Thermal Efficiency of Turbine Cycle 51,5 %• η tdi HP / IP / LP 92,5 / 94,6 / 92%
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ŠKODA POWER
Materials of Main turbine Components
Bolts – parting Plane Inconel 718Blades Böhler T550 / Böhler T505SC Piping P92 / P91
X14CrMoVNbN10-1
G-X12CrMoVNbN9-1
27NiCrMoV15-6
T671 H950
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ŠKODA POWER
Moving blades• HP part Böhler T 550 Extra Re > 600 MPa Rm 800 to 950 MPa• IP part Böhler T 505SC Re > 750 MPa Rm 870 to 1020 MPa• LP part X12Cr13 mod. Re > 490 MPa Rm 650 to 800 MPa• LP part L-0 Böhler T 671 H950 Re > 1103 MPa Rm > 1172 MPa
Turbine rotors• HP rotor COST F Re > 700 MPa Rm 800 to 950 MPa• IP rotor COST F Re > 700 MPa Rm 800 to 950 MPa• LP rotors 27NiCrMoV15-6 Re > 700 MPa Rm 850 to 1000 MPa
Main steam valve chambers• HP valves G-X12CrMoVNbN 9 1 Re > 450 MPa Rm 620 to 850 MPa • IP valves G-X12CrMoVNbN 9 1 Re > 450 MPa Rm 620 to 850 MPa
Materials of Main turbine Components
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ŠKODA POWER
High pressure casing
Four casing configuration
1 x HP – single flow (10 stages)Bearing span 5300 mm
Weight 122 t
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ŠKODA POWER
Four casing configuration
High pressure casing
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ŠKODA POWER
Four casing configuration
Intermediate pressure casing
1 x IP – double flow (2 x 8 stages)Bearing span 5450 mm
Weight 154 t
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ŠKODA POWER
Four casing configuration
Intermediate pressure casing
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ŠKODA POWER
Four casing configuration
Low pressure casing
2 x LP – double flow (4 x 5 stages)Bearing span 8250 mm
Weight 2 x 370 t
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ŠKODA POWER
Four casing configuration
LP rotor – solid forgedWeight 80 t
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ŠKODA POWER
Last stage moving blade
Material T 671Length 1085 mm (42”)
Four casing configuration
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ŠKODA POWER
Four casing configuration
LP casing – steam inlet
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ŠKODA POWER
HP control and stop valve
Main steam valves
• two chambers / left and right / alongside HP casing
• Valve body material P91 • Basic material of inner parts P91, P92• Stop valve balanced type• Control valves valve unbalanced type• Graphite spindle sealing
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ŠKODA POWER
Main steam valves
LP control and intercept valve
• IP Interception and Control Valves - four combined valves - two on each side of IP turbine
• Valve body material P91• Basic materials of inner parts P91,
X22CrMoV• Intercepting and control valve
balanced• Graphite Chesterton spindle sealing
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ŠKODA POWER
Main steam valves
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ŠKODA POWER
Turbine journal bearings
Ø 560 Rear LP2
Ø 560 Front LP2
Ø 560 Rear LP1
Ø 560 Front LP1
Ø 500 Rear HP
Ø 400Front IP
Ø 400Rear HP
Ø 300Front HP
Diameter [mm]
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
MAIN DATA OF MACHINE HALL:
Whole length of TG 59,7 m (incl. space for gen. rotor assy)TG elevation 15,00 m (TG centr. 16,3 m)Machine hall dimension cca 39 x 90 mMain machine hall elevation + 15,00 m,
+ 6,00 m (heaters),± 0,00 m,- 4,50 m
TG foundation with spring supported upper slabNo. of springs (GERB) 142 pcs
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
TG foundation
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
TG foundation
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Checking point of foundation
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ŠKODA POWER
GENERATOR
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
GENERATOR
ŠKODA USC 660 MW UNIT
Stator weight 316 tRotor weight 75 t
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ŠKODA POWER
GENERATOR
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
Main steam condensers:
No. of pieces for unit 2Type of condenser surface, single pathHeat transfer area 2 x 19 000 m²Tubing – number 20 462 pcs
dimensions Ø 22,0 x 0,70 x 13 520 mmmaterial ss
Condenser superstructure LP by pass damp tubesLPH No. 1 (condenser 1)LPH No. 2 (condenser 2)
Cooling water flow 15 000 kg/sEvacuation 3 x 50% - water ring pumpsBall continuous sponge cleaning system
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Main condenser - tubes
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Main condenser
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
LP heater – for placing into condenser neck
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
LP heater – placed in condenser neck
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Feed water tank – dia 4 m length 21,5 mWeight 120 t
Capacity 250 m3
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Feed water tank
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ŠKODA POWER
TG 660 MW
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
TG 660 MW
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
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ŠKODA POWER
ŠKODA USC 660 MW UNIT
Thank very much you for your attention.
Questions, please.