High Efficient Peak Power on Demand

High Efficient Peak Power on Demand Page 1 POWER-GEN Middle East, February 6-8, 2012, Qatar, Doha Jan Dirk Beiler Senior Performance Engineer Development Lead for Wet Compression Modernization and Upgrade Engineering Peter Trauner Head of Performance Increase Advanced 50Hz Frames Siemens AG 2011. All rights reserved. January 2012 Jan Beiler / Peter Trauner Energy Sector Siemens / Services AG 2012. All AL: rights N ECCN: reserved. N

High Efficient Peak Power on Demand Power-Gen Middle East 2012 High efficient Peak Power on demand Contents Need for power on demand Jan Dirk Beiler Senior Performance Engineer Development Lead for Wet Compression on 50Hz Service Frames Modernization and Upgrade Engineering Peter Trauner Head of Marketing Performance Increase for Advanced 50Hz Frames Wet Compression description Performance benefits Experiences Conclusion Page 2

Need for Power on Demand Rising need for power on demand Solutions for flexible power on demand Backup power needed High flexibility Power need for seasonal or daily peak time Gas turbine plants Wet Compression? Modernizations and upgrades for existing plants Page 3

Wet Compression Short Introduction Page 5

Wet Compression Hardware Scope Page 6

Wet Compression Peak Power on Demand Flexible reaction on power demand Stepless power adjustment within operation range High reserve power potential Limits to the performance 20 19 18 Maximum mass flow (design) 17 16 Shaft limit reached 15 75% of design mass flow 14 13 12 50% of design mass flow 11 10 Power increase by Wet Compression [% of base load power] Electrical components Combustion stability Shaft limit (mechanical) Auxiliary systems Hardware configuration 9 8 Minimum mass flow (start) Surge limits Maximum power increase has to be evaluated site specific 7 6 5 4 3 2 1 0 10 15 20 25 30 35 40 45 50 Ambient temperature [ C] Page 8

Performance SGT5-4000F First Time Implementation Gas turbine delta power output with Wet Compression: Up to 16% of base load power Gas turbine delta efficiency with Wet Compression: Up to 2.1% of base load efficiency Start mass flow Water mass flow : Up to 10.2 kg/s Wet Compression performance measured at first time application for SGT5-4000F @ 30 C, 60% r.h. Page 9

Wet Compression - Influence of Relative Humidity Example: Variation of humidity at 30 C ambient temperature Comparison between inlet cooling and Wet Compression (calculation for SGT5-2000E) Wet Compression is only little affected by humid air conditions Page 10

Wet Compression systems are running more than 50 x worldwide: More than 35 x on following frame types: SGT6-2000E SGT6-3000E SGT6-5000F 5 x SGT5-2000E 2 x SGT5-4000F 3 x SGT5-4000F 6 x SGT5-4000F (planned) Experiences 4 x SGT5-4000F (Grid) 2 x SGT5-2000E 2 x SGT5-4000F (Grid) Page 12

Gas Turbine Safety using Wet Compression Specific CFD-calculation to optimize the spray rack Advanced compressor coating to minimize corrosion 3-staged filter concept Fully integration in the gas turbine control Gas turbine safety Integrated safety functions to ensure operation within expectations Optimized operation regimes to minimize effects Page 13

Operation Experience Compressor Operation experience with Wet Compression on SGT5-2000E since 2004 : No pitting corrosion could be found at SGT5-2000E No tendency to pitting corrosion Coating loss on the leading edge and on the pressure side, but coating stays intact in the areas where salt residuals are left on the blades and vanes Lasting corrosion protection The leading edge gets rougher (needle structure) but no significant shortening of the blade width by erosion Base blade material not weakened Page 14

Siemens Gas Turbine Modernization SGT5-4000F Wet Compression Customer needs in general Power Efficiency Benefits can include: Up to 30 MW power output improvement * Power on demand Reliability & availability Operational flexibility Reduction of maintenance costs Emission reduction Higher operational flexibility Wet C gives you additional electricity of up to 75,000 MWh/year. Assumption: 30MW power improvement, peak load operation (250 days/ year, 10 h/day) * Subject to specific technical plant evaluation, expected values with test tolerance @ ISO condition. Page 16

Thank you for your attention Jan Dirk Beiler Senior Performance Engineer Development Lead for Wet Compression Modernization and Upgrade Engineering Page 17 Peter Trauner Head of Marketing Performance Increase for Advanced 50Hz Frames

Disclaimer This document contains forward-looking statements and information that is, statements related to future, not past, events. These statements may be identified either orally or in writing by words as expects, anticipates, intends, plans, believes, seeks, estimates, will or words of similar meaning. Such statements are based on our current expectations and certain assumptions, and are, therefore, subject to certain risks and uncertainties. A variety of factors, many of which are beyond Siemens control, affect its operations, performance, business strategy and results and could cause the actual results, performance or achievements of Siemens worldwide to be materially different from any future results, performance or achievements that may be expressed or implied by such forward-looking statements. For us, particular uncertainties arise, among others, from changes in general economic and business conditions, changes in currency exchange rates and interest rates, introduction of competing products or technologies by other companies, lack of acceptance of new products or services by customers targeted by Siemens worldwide, changes in business strategy and various other factors. More detailed information about certain of these factors is contained in Siemens filings with the SEC, which are available on the Siemens website, www.siemens.com and on the SEC s website, www.sec.gov. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in the relevant forward-looking statement as anticipated, believed, estimated, expected, intended, planned or projected. Siemens does not intend or assume any obligation to update or revise these forward-looking statements in light of developments which differ from those anticipated. Trademarks mentioned in this document are the property of Siemens AG, it's affiliates or their respective owners. Page 18