ConfigurationSteam Turbine Configuration

Multi Shaft Geared

Multi shaft Direct Drive

Single Shaft Geared

Single Shaft Direct Drive

Reheat Multi Shaft

Reheat Single Shaft

50Hz60Hz

50Hz60Hz

50Hz60Hz

50Hz60Hz

50Hz60Hz

50Hz60Hz

Multi shaft and single shaft arrangements are available options that make steam turbines suitable for customization to optimize plant performance, capital investment, construction and maintenance access, operating convenience and minimize space requirements.

SC/SAC SeriesReaction Tech.

PRODUCT CHARACTERISTICS

Power Rating: 2 to 100 MWSpeed Range: 3000 to 15000 rpmRated Steam Conditions: 140 bar (2030psi) 565°C (1050°F)Arrangement: Single casingCondensing LP Stages: Up to 5m2

(50 & 60Hz)Drive: Geared/Direct

KEY FEATURESSingle FlowImpulse/Reaction bladesCondensingSliding and/or fixed pressure controlUp to two controlled extractions availableAxial or Radial (up/down) exhaustBaseplate or Foundation mounting

A typical GE Industrial Steam turbine

MP/MC SeriesImpulse Tech.

PRODUCT CHARACTERISTICS

Power Rating: up to 50 MWSpeed Range: 3000 to 12000 rpmRated SteamConditions: 140 bar-a 540 deg C (1000°F)Arrangement: Single casingCondensing LP Stages: Up to 2.1m2

Drive: Geared

KEY FEATURESSingle FlowImpulse bladesCondensing or BackpressureMulti valvesExtraction/InjectionAxial or Radial (up/down) exhaustOptimized with Balance of PlantBaseplate mounting

A5/A9 Series Reheat

PRODUCT CHARACTERISTICS

Power Rating: 20 to 100 MWSpeed Range: 3000 to 12000 rpmRated Steam Conditions: 140 bar (2030psi) 565 °C (1050°F)Reheat: 565 °C (1050°F)Arrangement: Single casingCondensing LP Stages: Up to 5m2 (50 & 60Hz)Drive: Geared/Direct KEY FEATURESBack-to-Back configurationCentral admissionImpulse/Reaction bladesCondensingSliding and/or fixed pressure controlRadial (up/down) exhaustBaseplate of foundation mounting

Steam Turbines for GE Fr6 and Fr7 Heavy duty Gas TurbinesCombined cycle... Most efficient solution for today’s power needs

Today the power generation business requires machinery manufacturers to be focused on thermal efficiency, reduction of emissions and operational flexibility because of their strong impact on plant operating cost both for Utility plants and Industrial cogeneration. Combined cycle plants fueled by natural gas have become the preferred solution to meet the above requirements and most of design efforts have been directed towards improving the performance of gas fired turbo-generators including features that provide environment friendliness. GE Oil & Gas has a complete line of stream turbines for medium/small size combined cycle applications.

Overview of GE Industrial steam turbines

GE Oil & Gas Steam Turbines use both impulse and reaction blades technology for superior efficiency over a broad range of operating conditions. Used in condensing configurations, they virtually cover the gamut of Oil & Gas and Industrial Power Generation applications.

• The modular structured design permits a high degree of customization to meet the specific steam cycle needs and it can provide controlled or uncontrolled extraction/ injection of steam at any possible intermediate pressure level. • The inlet section has a trip valve directly mounted on the turbine casing and hydraulically actuated multi-valves for sliding pressure of constant pressure control. • Steam flow is controlled by partial or full-arc admission. Controlled extractions can be handled with a multivalve system similar to that used in the inlet section, or with off-shell throttling valves depending on the pressure levels and application requirements. • The exhaust section is in a separate casing flanged to the high pressure section. It can be radial (upward or downward flow) or axial.

Steam Turbine Solutions for Combined Cycle Applications

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T +44 207 302 6000customer.service.center@ge.com

For complete contact information,

please refer to our website.

The information contained herein is general in nature and is not intended for specific construction, installation or application purposes. GE reserves the right to make changes in specifica-tions or add improvements at any time without notice or obligation.

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Steam Turbine Solutions for Combined Cycle Applications

Installations

Location: SpainApplication: CC+Waste to EnergySTG Size: 56 MW (reheat)Steam Conditions: 96 bar-a/538°C/538°CStart up date: 2005Model : ST A9-26

Location: AlaskaApplication: Combined cycleGTG: 2xFr 6BSTG Size: 40 MWSteam Conditions: 42 bar-a/400°CStart up date: 2011Model : ST SC2-23

Location: PakistanApplication: Combined cycleGTG: 2xFr 6FASTG Size: 78 MWSteam Conditions: 90 bar-a/535°CStart up date: 2011Model: ST SC2-26

Auxiliary systems• Separate lube and control oil consoles• Acoustic enclosure for noise guarantee• Turning gear installed on gearbox for geared and separate integrated pedestal for direct drive• Condensing system and related auxiliaries

Controls & Instrumentation• PLC UNICOS based ST turbine control panel• BN3500 turbine monitoring• Generator protection integrated inside ST control panel• Automatic/manual synchronization options

Installation & Service• Erection and commissioning supervision • Performance testing• Remote monitoring aimed to reduce inspection intervals• Overhauls and emergency repairs• Operation & Maintenance training

Extended scope• Turnkey capabilities for entire power plant including HRSG • Field engineering and plant erection support

Completely Packaged Steam turbine with axial exhaust configuration

Typical layout of a double casing reheat steam turbine with generator driven in the middle

Single casing reheat Steam turbine rotor being assembled on the lower half of the casing

Key Design FeaturesSteam Turbine• Modular design from proven Oil & Gas technology• Customized steam path for superior efficiency Axial exhaust configuration for single shaft configuration and reduced footprint• Quick start-up with rapid load ramps • Start up customization based on specific plant requirements• High efficient last stage blading with design suitable for wide-range of exhaust pressures (water/air cooled)

Generator• Brushless excitation with PMG for both 50 Hz and 60Hz with 0.8 or 0.85 PF• Fully packaged installed directly on foundation TEWAC and CA/CW options• NEMA Class F insulation with class B temperature rise

1

2

3

4

5

1

2

4

5

6

Geared units

Up to 60 MW

Baseplate mounted with high-speed gearbox with maximum factory packaging for reduced installation time

Direct drive units

Up to 100 MW

Foundation or baseplate mounted. ST complete factory packaged with generator and other auxiliaries installed at site as modular ready to mount packages

Power output

Steam Parameters

Extraction for cogeneration

Exhaust Annulus area

Mounting and assembly

Up to 140 bar-a/565°C

Up to two controlled extractions

Up to 5m2

Reheat Steam Turbines

Advantages• Increased cycle efficiency... more power from same GT exhaust heat • Reduced maintenance... less moisture at exhaust yielding lower erosion at last stages even at very low condensing pressures• Less Water... reduced demineralized and cooling water usage for the same power rating

Single Casing Option• Single casing HP-IP/LP; geared or direct drive options• Steam chest separated from casing shell• Full arc of admission• Compact Solution with reduced footprint & axial exhaust condenser

Double Casing Option• Double casing with geared HP casing and direct drive IP/LP casing• Steam chest on casing shell• Generator driven in middle

Steam Turbine offerings for GE Fr6 and Fr7 GTs

GE Oil & Gas Industrial steam turbines are a good match for combined cycle plants with GE heavy duty frame GTs because of their modular design that assures high reliability and superior thermodynamic and mechanical performance. This insures the right match both for standardized/modular plants and for custom tailored power plants for industrial cogeneration. These steam turbines are suitable for frequent starting-and-loading duty and are designed for high cyclic life without compromising base load capability.

Geared Units: Equipped with the latest developed High Speed (HS) last stage buckets, these geared compact and factory packaged units are designed to yield the best possible combined cycle efficiency with the flexibility of frequent start and rapid loading.

Direct Drive Units: Equipped with advanced 3D aerodynamic last stage buckets, the direct drive units are designed for superior steam path efficiency and reliability. Exhaust areas up to 5m2 are available both for 50Hz and 60Hz market.

* Note: Turbines output and efficiency indicated in this table are reference values. Actual values depend on cycle specific configuration and ambient conditions. Values stated are assumed at ISO conditions with no duct firing and other internal assumptions. For project specific details please contact GE’s sales representative.

Geared solution Direct Drive solution

1 - Steam Turbine; 2 - Generator; 3 - Gearbox; 4 - Lube oil console; 5 - Gland steam condenser; 6 - Main steam condenser Fr 6FA

Fr 6B

Fr 6C

Fr 7FA

Fr 7EA

Fr 9E

1x2x1x2x3x4x1x2x3x4x1x

1x2x

1x

771544284

1261684590

135180183

85170

126

4185224770932246699286

4594

67

11823964

13119626167

136204272269

130264

193

5555.649.0

49.8

54.3

55

57.3

50.250.9

52.0

GT Model

(50/60Hz)

(50/60Hz)

(50/60Hz)

(50/60Hz)

(50/60Hz)

(50/60Hz)

Typical dimensions: 15m(L) x 6m(W) x 7m(H) Typical dimensions: 22m(L) x 7m(W) x 8m(H) CC Config. GT power ST power

approx.CC power approx.

CC eff approx.

%