Advanced Gas TurbineTechnology GT26

Presentation at the Jornada Tecnológica in Madrid

Johannes WickGeneral Manager Gas Turbine Project Execution

26 October 200626 October 2006

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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Increasing Efficiency

Lower Emissions (NOx, CO)

Improved Availability/Reliability

– Proven Technology

– Extended Lifetime

Improved Operational Flexibility

– Part Load Operation

– Start-up times and loading gradients

– Fuel flexibility (e.g. C2+ content)

GT TechnologyToday and future market requirements

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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Annular Combustorin GT8C2, GT13E2,GT24 and GT26

EV burners used in allALSTOM gas turbines

Maintenance free, welded rotorin all ALSTOM heavy duty gas turbines

GT TechnologyCommon ALSTOM GT Features

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Technology Welded Rotor

One piece design with forged discs welded togetherApplied since 1929 to all GT and ST rotorsMaintenance free - no restacking required – no major overhaul

No major overhauls:Increased availability and reduced maintenance

Compressor LP Turbine HP Turbine

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Technology Single Shaft Sequential Combustion

annular EV Combustor

AnnularSEV Combustor

RetractableSEV Fuel Lance

24 SEV Burners

EV = EnVironmentalSEV = Sequential EnVironmental

RetractableEV Burnerswith EV Fuel Lances(GT24=20, GT26 =24)

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Technology EnVironmental (EV) Burner

A standard burner design, used in all ALSTOM gas turbinesA simple robust design:– No maintenance-prone cans, transition

pieces, or cross-fire tubes– No burner inspections required

Perfect air and fuel mixing:– fuel gas injection into high velocity air

stream– flame stabilized in combustor with no

contact with burner

EV dry low NOx Technology -the cost effective way to low emissions

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 OperationOperation Concept

Load [% of base load]

100%

EV-Combustor Temperature

GT Exhaust Temperature

0%

SEV Combustor Temperature

SEV Ignitionat ~12% Load

40%

Inlet Air Mass flow(Inlet Guide Vane Position)

VIGV idle position

VIGV open

EV temperature maintained from about 30%-100% load for low emissionsHigh exhaust temperature maintained from 40%-100% load for high CC part load efficiency

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine Part Load Efficiency

GT exhaust temperature maintained from 40% to 100% GT loadHigh exhaust energy - optimal for high steam parameters under full and part load conditions

-

Relative CCPP Efficiency vs. CC Load

80%

85%

90%

95%

100%

40 50 60 70 80 90 100CCPP Load [%]

Rel

ativ

e C

C G

ross

Effi

cien

cy Sequential Combustion

Single Combustion

12© ALSTOM 2006. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty

is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT26 TechnologyNOx Emissions

Lowest NOx Emissions from 40% - 100% Loadwith the GT26 Sequential Combustion System

1

10

100

1000

40% 50% 60% 70% 80% 90% 100%Relative Load [%]

NO

x_dr

y @

15%

O2

[ppm

]Measurements at the GT26 Test Power Plant

in Birr Summer 2005

Typical permit limit of 25 vppm

Measurements

13© ALSTOM 2006. All rights reserved. Information contained in this document is provided without liability for information purposes only and is subject to change without notice. No representation or warranty

is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine Combined Cycle Start-up Curves

Full Load

Hot Start (max. ~8 hrs shutdown)

Warm Start (~60 hrs shutdown)

Cold Start (>120 hrs shutdown)

47 115 145

Time [minutes]52

Mul

ti Sh

aft

Sing

le S

haft

165140Single Shaft:Multi Shaft *:

HRSG purging time

not includedGT

Ignition

* 1 static frequency converter-> sequential start-up of GT’s

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Quality Engineering Rolls-Royce - ALSTOM Agreement

High Lift 3D Shape Inter-action with Film Cooling

Uncovered Side Coolingat Blade Trailing Edges

Rear Outer and Inner Discharge Nozzle

Internal Heat TransferCoefficient Prediction

Design forReduced Leakage

Secondary AirFlow

KnowledgeBased DesignSystems andProcesses

External Heat Transfer Coefficient & Tempera-ture Prediction

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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Complete

CP1

CP0

CP2

CP3

CP4

Specify DeriveConcept ValidateDetail

DesignCP5

Introduceto

fleet

Agreed baseline

Development specification

Concept freeze

Design freeze

Release for introduction

Part & Component Tests e.g. burner tests

ALSTOMTest Power Plant

GT24/GT26 Quality EngineeringProduct Development Process

Validated to the Appropriate Level

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT8C2 Engine in Simple Cycle Operation

GT26 Engine in Simple Cycle Operation

GT24/GT26 Quality EngineeringALSTOM’s GT Test Power Plant

Small Size

Advanced Technology

The ALSTOM GT Test Power Plant in Birr, Switzerland

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Quality Engineering Why a Dedicated Test Power Plant?

Flexibility in test campaign planning without commercial time constraintsAbility to operate the engine at extreme conditionsProximity to R&D and manufacturing facilitiesOperating experience under real load conditions(connection to Swiss grid)

GT Test Power Plant and Rotor/Blade Manufacturing in Birr,

Switzerland(15 min from Baden Office)

The ALSTOM Gas Turbine Test Power Plant Advantage

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Gas TurbineKey Advantages

Advantages of GT24 / GT26 Sequential Combustion seen in the field – Superior part load efficiencies– Low emissions from 40% to 100% load– High fuel flexibility (natural gas composition; oil No.2)– Very low combined cycle start-up times

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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>2’000’000 fired hours with >40’000 startsat >98% GT reliability

GT24/GT26 Gas TurbinesReferences

79 units commercial (51 x GT24, 28 x GT26)*)

+ 19 GT26 units in constructionThailand, Germany, Italy, Spain, UK, France & Australia

-> next project will get 100th turbine!

Fleet Experience:– Simple Cycle, Combined Cycle and Repowering– Single Shaft and Multi Shaft– From “Daily starts and stops” to “base load” operating plants– Natural gas (also with high inert/C2+), oil with online fuel switch-

over– Power Augmentation by Inlet cooling & High Fogging

*) excl. GT26 at the GT Test Power Plant in Birr, CH

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT24/GT26 Fleet

TOCOPILLA 1xKA26-1Electroandina

DOCK SUD, 1xKA26-2 CDS

ALSTOM Gas Turbine Test Power Plant, 1xGT26

GILBERT 1xGT24 ReliantBURGIN 2xGT24 LG&EAGAWAM 1xKA24-1 PDCMIDLOTHIAN 4xKA24-1 ANPISLAND COGEN 1xKA24-1 WestcoastLAKE ROAD 3xKA24-1 Lake Road

Generation MILFORD 2xKA24-1 PDCBLACKSTONE 2xKA24-1 ANPBAYSIDE 1xKA24-1 Westcoast*)HAYS 4xKA24-1 ANPMIDLOTHIAN II 2xKA24-1 ANPBELLINGHAM 2xKA24-1 ANPLA PALOMA 4xKA24-1 PG&E

HAI FU, 2xKA24-2 Ever Power

TARANAKI 1 xKA26-1 Contact Energy

CHIBA1xKA26-1 JFE

ROCKSAVAGE 1xKA26-2 InterGenENFIELD 1xKA26-1 E.OnSHOREHAM 1xKA26-1 Scottish PowerCORYTON 1xKA26-2 InterGenLANGAGE 1xKA26-2 Centrica

BOWIN 2xKA26-1 Glow IPP Co.BANG BO 1xKA26-1 EPECKHANG KHOI 2xKA26-2 Gulf Power

TERMOBAHIA 1xKA24-1 Petrobras/EV

Single Shaft Combined Cycle in redMulti Shaft Combined Cycle in black & underlinedSimple Cycle in blue and italic*) = Repowering Projects

MONTERREY 2xKA24-1 CFEROSARITO 2xKA24-1 CFEHERMOSILLO 1xKA24-1 Union FenosaMONTERREY III 4xKA24-1 Iberdrola En.

Legend:

BESOS 1xKA26-1 EndesaBESOS 1xKA26-1 Gas NaturalSAN ROQUE 1xKA26-1 EndesaSAN ROQUE 1xKA26-1 Gas NaturalCASTEJON 1xKA26-1 Hc EnergiaCARTAGENA 3xKA26-1 Gas Natural CASTEJON 2 1xKA26-1 Hc EnergiaMALAGA 1xKA26-1 Gas NaturalSOTO DE RIBERA 1xKA26-1 Hc Energia

RDK 1xKA26 EnBW *)

SWANBANK 1xKA26-1 CS EnergyTALLAWARRA 1xKA26-1 TRUenergy

SCANDALE 2xKA26-1 Eurosviluppo ElettricaGISSI 2xKA26-1 AbruzzoenergiaMODUGNO 1xKA26-2 Energia

SENOKO 1xKA26 Senoko Power *) SENOKO II 2xKA26 Senoko Power *)

PORYONG, 4 xKA24-2 KEPCO

RINGSEND 1 xKA26-1 Synergen

CyCoFos 1xKA26-1 CyCoFos

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0%

20%

40%

60%

80%

100%

1

GT24/GT26 FleetReliability (acc. ISO 3977/IEEE 762)

60 x GT24/GT26 units monitored

– 82% of the plants in commercial operation

Data taken from start of commercial operation

– until 30th June 06– covers a total of

1’857’362 period hours

No significant differences between GT24 and GT26

GT Reliability

GTReliability

>98%(including

GT auxiliaries)

Average Plant Reliability >97%Average Plant Starting Reliability >95%

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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GT26 Power PlantsSome exceptional facts for GT26 Units

GT26 CCPP Castejonachieved 98.0% plant availability in its first3 years of operation

The GT24/GT26 is a reliable workhorse

GT24/GT26 fleet recordof continuous operationis 189 days in GT26Bang Bo Plant in Thailand

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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Cartagena Plant, Spain– 1’200 MW based on

3 x GT26 single-shaft power trains– EPC for CCPP & long term O&M– Repeat order

Complete plant handed over to the client and in commercial operation<25 months construction timePAC in achieved ahead of schedule

GT26 Power PlantsMost Recent Commercial Plant in Spain

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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all data at ISO conditions

Plant Net Output MW 424.0 850.3 857.7

Plant Net Efficiency % 58.3 58.5 59.0

Plant Net Heat Rate kJ/kWh 6’172 6’156 6’103

KA26-1Single Shaft

1 on 1

KA26-2Multi Shaft

2 on 1

Gross Gas Turbine ISO RatingGT26 288.3 MW 38.3 %

GT26 Gas Turbine GT and Plant Performance

KA26-2 ICSTM

Multi Shaft2 on 1Net Combined Cycle Plant Output

ALSTOM’s large size, advanced GT26:Highest combined cycle efficiency in its class

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GT24/GT26 Gas Turbine

Market Requirements

Design Features

Operational Flexibility

Development and Validation

GT24/GT26 Overview and Fleet Status

Summary

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is given or to be implied as to the completeness of information or fitness for any particular purpose. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited.

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Gas Turbine TechnologySummary

Evolutionary steps ensure a conservative approachtowards 60% CCPP efficiency with existing platforms

Two ways of developments in the market: – New model with new technology

• Steam cooling, new materials …– Upgrading mature technologies

ALSTOM’ way: upgrades mature technology– With proven elements & calibrated tools– Maximization of performance and decrease of emissions– Optimisation of economics

Upgrades validated and in operationUpgrades accepted by the market– 15 engines with new rating already sold

www.alstom.com