AEV Burners of Alstom GT26/24

1. TPW/BPROS/GT13E2AEV/eng/GAS/11.12/CH/7782 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No
representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and
commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express
written authority, is strictly prohibited. Alstom contributes to the protection of the environment. This leaflet is printed on environmentally-friendly paper.
Improved low load operation
and maximum flexibility
The need for operational flexibility and the challenge of complying with stricter
emissions regulations are top of the agenda of every power plant owner. Alstom’s
ongoing investment in burner technology has resulted in the new Advanced
EnVironmental (AEV) burner for GT13E2 gas turbines.
Building on the proven features of Alstom’s EnVironmental (EV) burner, the AEV burner
employs a new continuous fuel variation concept as the basis for more flexible and
reliable operations. The burner also introduces emissions-compliant low load operation,
which enables operators to react to demand changes rapidly and reduce maintenance
costs by reducing the frequency of plant shutdowns.
KEY TECHNOLOGY FEATURES
• Optimised low load operation with low levels of NOx, CO and visible emissions
• Simplified fuel gas operation eliminates switching between pilot and premix gas
• Enhanced transient behaviour and start-up reliability
• Simplified burner arrangement: 48 AEV burners instead of 72 EV burners
• Excellent NOx stability and reduced air pre-heating requirements over a wide range
of ambient temperatures
• High resistance to changes in fuel gas composition
• Low emissions and low water consumption for fuel oil operation
• Burner sieve to prevent foreign objects from upstream of the burner entering the turbine
Alstom’s AEV burner is
a major advance in low
emissions, dual fuel burner
technology and heralds
a new era of operational
flexibility for the GT13E2.
GT13E2 AEV Burner
An evolutionary gas turbine solution
Gas Service SOLUTIONS
Customer benefits
Operational flexibility
Low load capability to react
instantly to changes in demand
and to provide ancillary services
such as spinning reserve
Reliability
Elimination of switch-over/
switch-back by using continuous
fuel staging
Lower fuel costs
Increased fuel flexibility allows
cost saving fuel options
Cold performance
Reduced pre-heating
requirements when ambient
temperatures drop
Convenient implementation
Full installation during a standard
hot gas path type C inspection
Compatibility
Compatible with all available
Alstom turbine upgrade packages
Fuel supply
Support tube with
premix gas internally
Fuel oil lance
Burner sieve
Burner body
Burner front face

2. Enhanced flexibility for responsive operations
The AEV burner is a value-adding upgrade based on latest available technology. The original Alstom EV burners already set a high
performance standard, but the new AEV burner has taken operational flexibility, availability and reliability to the next level.
The AEV uses a continuously variable fuel staging system which completely removes the need for EV-typical switch-over and switch-
back between pilot and premix gas. This permits a wider operational range with acceptably low emissions.
During periods of low demand operators may not need to shut down, but have the ability to operate the gas turbine below 40% of GT
relative load while remaining fully emission compliant. Keeping the unit on-line at low load enables the operator to react instantly
at the first sign of increasing power demand. Furthermore, additional income may be generated from the ability to offer wider and
ancillary services such as spinning reserve.
This flexibility is a major step towards lower running costs, lower maintenance costs, higher availability and improved revenues.
Simplified architecture
With one less fuel gas control valve and a much simpler Fuel Distribution System (FDS), maintenance is reduced. Spare parts
management has also been streamlined. 48 identical burners replace the 72 left- and right-handed burners of the EV burner system.
EV burner
EV burner configuration
with 72 burners
AEV burner configuration
with 48 burners and Simplified
Fuel Distribution System
AEV burner

3. Gas Service SOLUTIONS
GT13E2 AEV Burner
More effective for emissions control
The AEV burner allows reduced emissions at low load and low ambient temperatures.
Emissions BEHAVIOUR DURING fuel gas operation
The AEV is able to operate with consistently lower NOx
emissions down to below 40% GT relative load.
Low NOx operation at low load is a key benefit for plant operators
who want to benefit from a high spinning reserve and EOH
savings from reduced cyclic operation.
HIGHER PERFORMANCE IN COLD AMBIENT CONDITIONS
When the ambient temperature drops to below 15°C, the EV
burners typically required intake air pre-heating to keep NOx
emissions to a minimum. The new AEV burner allows operation
to lower ambient temperatures without the need for intake
pre-heating.
Emissions BEHAVIOUR DURING fuel oil operation
When operating with fuel oil, the AEV NOx emissions are
compliant with most common market requirements from 50%
relative load upwards. Additionally, there is a low level of visible
emissions, even during transient conditions and at baseload.
REDUCED WATER CONSUMPTION
Another key advantage compared to the EV burner, the AEV
burner needs around 60% less NOx water for emissions
compliant operation.
Relative load [%]
Current EV switch-over point40% GT relative load
Typical CO limit 80 ppm
GT13E2 with AEV burners: typical emissions
15
0 0
1
10
100
1000
10
20
30
40
50
60
70
80
90
100
25 35 45 55 6040 65 75 85 95 105
NOxemissions[ppm]
COemissions[ppm]
Typical NOx emissions
Typical CO emissions
NOx
CO
Typical NOx limit 25 ppm

4. TPW/BPROS/GT13E2AEV/eng/GAS/11.12/CH/7782 © ALSTOM 2012. All rights reserved. Information contained in this document is indicative only. No
representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and
commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express
written authority, is strictly prohibited. Alstom contributes to the protection of the environment. This leaflet is printed on environmentally-friendly paper.
Gas Service SOLUTIONS
GT13E2 AEV Burner
Operational experience
The first GT13E2 AEV burner upgrade was carried out in 2006 and is a validated, well
established Alstom product. With years of proven, reliable operation experience, Alstom
is now offering the AEV burner for new sales of GT13E2 gas turbines, as well as for
upgrades of existing units already in operation.
Fast implementation
The full AEV upgrade package can be implemented during a normal C inspection.
Site works during the standard C inspection duration include exchange of combustor
hardware (burners, lances, front segments), exchange of FDS and control logic
modifications.
In addition to the complete AEV burner package and simplified fuel distribution system,
a blower skid is required to provide supplementary bearing sealing air during low
part load operation, when the Variable Inlet Guide Vane (VIGV) is almost closed. The
blower skids and associated piping are included in the scope of supply, and can also be
installed during the standard C inspection duration.
A minimal extension of the standard commissioning scope may be required depending
on site specific conditions.
For more information
please contact your local
Alstom representative
or visit Alstom online:
www.alstom.com