GT11N2 M upgrade product leaflet
Transcription
GT11N2 M upgrade product leaflet
GAS SERVICE SOLUTIONS The New GT11N2 M Upgrade Performance and operational flexibility Alstom’s turbine upgrades bridge the gap between the latest technological developments and existing proven gas turbine designs to keep your plant competitive. Boost plant availability and revenues The GT11N2 has proven its reliability with high availability figures across the fleet since its first firing in 1994. Its main area of installation is the 60 Hz market, but it is also available for 50 Hz applications. The new GT11N2 M upgrade was developed to meet the future demands of the power markets. This upgrade has been successfully validated and is now operating in multiple units worldwide. It offers the possibility to operate the engine in three different operating modes, depending on your specific market requirements. All three modes can be selected on demand and online. This flexibility allows electricity costs to be continuously optimised in your plant. MAXIMUM FLEXIBILITY TO OPTIMISE ASSETS CUSTOMER BENEFITS Flexibility Three switchable operating modes for maximum extended lifetime or extra power output and efficiency TPWR/PRSHT/GT11N2M/EN/6.2014/CHE/2217 © ALSTOM 2014. All rights reserved. Reduced maintenance costs Extended service intervals of up to 48,000 EOH Performance Up to 12 MW power output and up to 1.4% (add.) GT efficiency due to improved turbine At peak demand, the new GT11N2 M upgrade package provides maximised power output and efficiency with its Maximum Continuous Load (MCL) mode. For reduced power demand, the GT11N2 M operation concept offers the Performance (P) mode or Lifetime (L) mode to increase the intervals between the hot gas path type C inspections from 24,000 equivalent operating hours (EOH) up to 48,000 EOH. Compared to the originally installed configuration the power output and efficiency is significantly increased in all three operation modes. The new GT11N2 M upgrade can be fully retrofitted to the GT11N2* and can be implemented during a regular C inspection. It is also possible to carry out a phased upgrade including the first and second turbine stages, in order to reduce initial investment and utilise the remaining lifetime of the rear turbine stages. 48,000 EOH Service interval in lifetime mode KEY FEATURES OF THE GT11N2 M TURBINE UPGRADE The basis for the increase in performance is the completely redesigned turbine blading in line with Alstom’s proven turbine upgrade technology. State-of-the-art turbine aerodynamics and cooling coupled with the use of proven base materials and coating systems ensure the highest possible benefits with maximum reliability. *Upgrade available for the GT11N2 with 3VGV compressor and EV combustor, gas as main fuel, oil as backup Reliability Enhanced component reliability due to design improvements and state-of-the-art cooling 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. Enhanced turbine blading - the M-blading State-of-the-art 3D profiles are used for all turbine blades and vanes. In order to reduce leakage and therefore improve turbine efficiency, labyrinth sealings on the rotor heat shields and honeycombs for all vanes have been introduced. The rotor and stator sealing system has been improved based on GT11N2 field experience in terms of maximum mounting convenience and design simplicity. For customers who want to utilise the full lifetime of their GT11N2 standard blading components, Alstom can offer a modular upgrade of the gas turbine. This modular upgrade consists of the first and second stage of the M blading in combination with the existing third and forth stage of the standard blading. With this option you can immediately benefit from a performance and lifetime improvement with a reduced initial investment, which can be followed up with a full upgrade during the next C inspection. STAGE 1 STAGE 2 & 3 STAGE 4 An enhanced cooling air concept for the blades and vanes together with a thermal barrier coating (TBC) for the first stage components ensures optimised efficiency and lifetime. Stator heat shield (SHS) A is separated from vane 2 as a result of the GT11N2 field experience, thus improving the lifetime and optimising reconditionability. The blades of stages 2 and 3 as well as the vanes of row 3 are coated with an anti-oxidation coating. Additionally, a TBC coating protects the stage 2 vanes. The vanes of stages 2 and 3 are separated from the respective heat shields and have a shrouded vane tip that, together with the re-designed rotor heat shields, leads to an optimised stage efficiency. The main feature of the blade 4 improvements is the replacement of the damping bolts with a full airfoil tip shroud with a two rim design. The adjacent stator heat shield D is equipped with a honeycomb to increase the efficiency of the stage. Blade 1 M-blading stages 1 to 3 with separated stator heat shields A & B FURTHER IMPROVEMENTS Supplemental design improvements have been introduced based on the GT11N2 field experience. The hot gas casing (HGC) and inlet segments are now TBC-coated. Furthermore, the HGC collar and the cooling of the HGC have been improved. Improved collar design Improved cooling TBC Existing components can be upgraded during reconditioning. Improved hot gas casing Stage 4 with shrouded blade 4 GAS SERVICE SOLUTIONS THE NEW GT11N2 M UPGRADE Mode switching, the perfect response The concept of the new GT11N2 M turbine upgrade offers you maximum flexibility in adapting to specific market requirements. Minor adjustments to the control system permit online switching between the MCL, P and L-mode. When market demand is high, you can choose the MCL-mode for maximum power and efficiency. With the P-mode you have the option to choose the optimised operation point with regard to performance and lifetime extension. When energy demand is low, the unit can be run in the L-mode with reduced performance but a major extension of the interval between C inspections. Additionally, the CO2 per produced MWh is significantly reduced depending on the chosen operation mode, resulting in higher revenues, lower fuel costs and a reduced environmental impact. By opting for the new GT11N2 M upgrade, the C inspection interval is extended to 48,000 EOH. As a result, two out of four C inspections can be saved over a period of 12 years compared to the original configuration. Basis: GT11N2 3VGV EV, 8000 EOH per year A plant-specific study is required in order to define the requirements and benefits for each individual upgrade. The new GT11N2 M upgrade can be implemented during a slightly extended scheduled C inspection. GAS SERVICE SOLUTIONS THE NEW GT11N2 M UPGRADE Performance fully validated The new GT11N2 M upgrade is based on Alstom’s proven development philosophy and uses proven base material and coating systems as well as efficient cooling system designs to improve the components’ lifetime and performance. The design also takes into account extensive field experience to improve the lifetime and optimised reconditionability of the components. REDUCING COST OF ELECTRICITY With online switching capability between three operation modes, the new GT11N2 M upgrade offers improved operational flexibility, making it possible to adapt to specific market requirements. An important part of Alstom’s development process and introduction of new products into the fleet is the whole engine validation of the upgrade. The GT11N2 M was successfully implemented and validated in a GT11N2 in Taiwan in 2008 and is now operating in its second C-cycle. All components were assessed to be in very good condition, confirming the design calculations and allowing further optimised product positioning. LOWERING ENVIRONMENTAL FOOTPRINT TPWR/PRSHT/GT11N2M/EN/6.2014/CHE/2217 © ALSTOM 2014. All rights reserved. INCREASING FLEXIBILITY & RELIABILITY BENEFITS For more information on the New GT11N2 M Upgrade please contact your local Alstom representative. ALSTOM (Switzerland) Ltd. Brown Boveri Strasse 7 5401 Baden - Switzerland Visit us online: www.alstom.com Basis: GT11N2 3VGV EV All values at ISO conditions, base load, gas operation, GT only Specific benefits in power output and efficiency are dependant on the status and limitations of the existing plant. 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.