SGT-800 Industrial gas turbine Power Generation Please address

SGT-800 Industrial gas turbine Power Generation Please address all correspondence to: Siemens Industrial Turbomachinery AB; SE-612 83 Finspong; Sweden © Siemens Industrial Turbomachinery AB 2011. All rights reserved. 1 No part of this document may be reproduced or transmitted in any form or by any means, including photocopying and recording without the written permission of Siemens Industrial Turbomachinery AB SGT-800 E O IP

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 2 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

Siemens range of Gas Turbines SGT-800 47 MW State-of-the-art and innovative gas turbines to meet today’s and tomorrow’s energy needs 3 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Simple and robust for reliable power generation in the 47

SGT-800 Industrial gas turbine Features and benefits § High industrial gas turbine electrical efficiency § Dual fuel low emissions technology § Fuel changeover capability § Stable load rejection capability, <5% overspeed § Low gas supply pressure, 27 -30 bar(a) § High exhaust energy giving excellent cogen/CC characteristics § Established onsite service concept 5 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Features and benefits Features Resulting in § Excellent cogen/CC efficiency ü Minimized fuel costs § Low NOx emissions with simple dual fuel DLE technology ü Low NOx emission without water injection § Flexible maintenance concept onsite maintenance or modular overhaul ü Reliable operation ü Predictable service costs § Robust industrial heavy duty design § Low gas pressure requirement 6 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Fleet experience & Worldwide sales Fleet Experience Sales by Industry Segment § Service introduction year = 1999 § Units sold to date = 131 § Total fleet hours > 1, 300, 000 § Lead Package hours > 70, 000 § Fleet Availability 98. 2%* § Fleet Reliability 99. 8%* * AF/RF figures based on a 12 month rolling average Worldwide Sales 7 Sales by Application © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Installation locations 1 turbine 2 turbines 3 -4 turbines 5

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 16 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Simple cycle performance - natural gas ISO rating - base load § Pe § S. H. C. § El. efficiency § Exhaust mass flow § Exhaust temperature 17 47 000 k. W 9 597 k. J/k. Wh / 9096 Btu/k. Wh 37. 5 % 131. 5 kg/s 544 °C / 289. 9 lb/s / 1, 011 °F © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine DLE combustion system capability Burner type Fuel 50 -100% load NOx @ 15% O 2 50 -100% load CO @ 15% O 2 Note Gas burner Natural gas ≤ 15 ppmv ≤ 5 ppmv Dry Dual fuel burner Natural gas ≤ 15 ppmv ≤ 5 ppmv Dry Diesel No. 2 ≤ 42 ppmv ≤ 5 ppmv Dry Emission Guarantees are issued separately in each project, depending upon site conditions, required load range and other project specific data. 18 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Performance Factors that affect power output include SGT-800 -47 Nominal Generator Output and Heat Rate for gas fuel 55 10. 4 10. 3 10. 2 45 10. 1 10 40 9. 9 9. 8 35 Heat Rate, MJ/k. Wh Generator Output, MW 50 9. 7 9. 6 30 9. 5 -40 -30 -20 -10 0 10 20 30 40 § § § Inlet & exhaust system losses Humidity Fuel quality/type Temperature Altitude Atmospheric pressure Compressor Inlet Air Temperature, °C SGT-800 -47 Nominal Exhaust Mass Flow and temperature for gas fuel 590 140 580 135 570 130 560 125 550 120 540 115 530 110 520 105 Exhaust Temperature, °C 600 145 Exhaust Mass Flow, kg/s 150 510 -40 -30 -20 -10 0 10 20 30 40 Compressor Inlet Air Temperature, °C 19 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Cogeneration cycle 11. 2 % losses 1 -pressure HRSG 51. 6 % process heat Gas Turbine 37. 2 % electricity 100 % fuel Total Efficiency 88. 8 % 20 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Combined cycle 11. 6 % losses Steam Turbine (condensing) 520 deg C 2 -pressure HRSG 31 deg C 17. 2 % electricity 31 deg C Gas Turbine 15 deg C 37. 1 % electricity 27 deg C 100 % fuel 34. 1 % losses Total Efficiency 54. 3 % 21 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Steam Raising Capabilities for Gas Turbine Co-Generation Plant 125 75 50 am te ds g isin ra Fire SGT-400 100 SGT-700 Unfired Fired SGT-600 150 SGT-500 175 SGT-100 SGT-200 SGT-300 Steam (tonnes/hr) [12 bar saturated] 200 sing ed Unfir rai team s 25 0 0 5 10 15 20 25 30 35 40 45 50 Power (MWe) Notes: 1. Steam values are indicative only. Actual values depend on site configuration 2. Firing to 850ºC only. Higher firing is available 22 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Performance - combined cycle, natural gas Condensing operation Non - reheat, 1 x SGT-800 GT ST Auxiliaries 46 000 k. We 21 400 k. We -900 k. We Net total 66 500 k. We Fuel El. Efficiency SCC-800 1 x 1 123 800 k. J/s 53. 7 at ISO-conditions including losses 23 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Performance - combined cycle, natural gas Condensing operation Non - reheat, 2 x SGT-800 GT ST Auxiliaries Net total Fuel El. Efficiency SCC-800 2 x 1 92 100 k. We 44 400 k. We -1 400 k. We 135 100 k. We 248 300 k. J/s 54. 4 % at ISO-conditions including losses 24 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Excellent combined cycle part load efficiency Part Load Performance Combined Cycle 60 Efficiency, % 55 50 45 40 35 50 60 70 Base Load Power, % 80 90 100 Condensing operation Non - reheat, 1 x SGT-800 Natural gas fuel = LHV 46798 k. J/kg Altitude (sea level) = 1, 013 bar Relative humidity = 60 % 25 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 26 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine General Arrangement Combustion air inlet filter Exhaust Enclosure ventilation inlet Enclosure ventilation outlet Fire suppression cabinet AC generator Generator cooling air inlet Electrical and Control module Lube oil cooler 27 Generator air outlet © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Compact and flexible layout Small footprint § Dimensions ~27 x 7 m § Auxiliary equipment on a separate skid Standardized § The layout is basically the same for all applications 28 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Standard reference plant Combined Cycle Power Plant § Lead time reduction § Proven plant concept § Maintainability improvement § Long standing relations with key suppliers § Risk reduction § Availability increase 29 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 30 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Designed for reliability Simple and robust § Single rotor with tilting pad type bearings § Cold end drive § All welded compressor rotor § Annular combustor § Bolted 3 -stage turbine 1 -shaft Gas Turbine Bearing #1 (radial + thrust) Engine inlet Annular cc with 30 dual fuel DLE burners 15 stage compressor 3 stages variable guide vanes Bearing #2 (radial) Maintainable § Modular design § On-site maintenance Drive shaft to gear box 3 stage turbine Engine exhaust diffuser 6600 rpm 31 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 32 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Easy on-site maintenance § Modular build-up for easy maintenance on site § No need for special workshops maintenance § Gas turbine can be removed on rollers through the sliding door § Removable burners for short and easy inspection § Vertically split compressor casing 33 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Maintenance Programme Basic Maintenance Plan Level "D" Level "C" Level "B" Level "A" Operation Maintenance 10 20 30 40 50 60 70 80 90 100 110 120 Eq. Op. Hrs x 1000 34 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Service in situ Removal of the turbine module 35 © Siemens Industrial Turbomachinery

Emergency back-up 24 -hour telephone support Operation support § 24/7 emergency phone § On-line remote troubleshooting § Remote Monitoring System Emergency gas generator Emergency resources § Service engineers § Tools & spare parts § Core engine & modules § Service depots Emergency store Guaranteed mobilization time § Personnel - 24 hours § Tools, spares, engine & modules to site or to international freight forwarder within 72 hours 36 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

Remote monitoring (STA-RMS) § Data collection § Decision Support § Reporting Plant Data: § Operational Data Customer Closed Loop Service § Risk Mitigation § O&M support § Solutions / Improvements § Trouble shooting 37 Diagnostics Experts Team FLEET INPUT © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

Remote monitoring (STA-RMS) Siemens' system provides. . . § … our customer with a professional tool for optimisation of operation, i. e. increased reliability and availability § … built-in OEM knowledge § … access to real and historic data § … monitoring of performance § … monitoring/trending and plotting of vibrations for analysis and diagnostics § … a powerful tool for the continuous improvement process § … the possibility of remote software upgrades without a site visit Results in a way to optimise operation by storing, analysing and exchanging information 38 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Contents § Main features, benefits and experience § Performance characteristics § Package design § Core engine design § Maintenance § Reference sites 39 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Combined Cycle application Riga SCC-800 x 2 DH Riga, Latvia § Combined heat and power plant supplying electricity and district heating for the city of Riga. Owned by Latvenergo, the Latvian national electricity company § Turn key delivery from Siemens including two SGT-800's, steam turbine, two supplementary fired HRSG, auxiliaries and balance of plant § Handed over to customer on schedule 2005 § Nominal power output 140 MW and up to 150 MWth for district heating § DLE combustors operating on natural gas 40 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Simple Cycle application MMPA SGT-800 x 1 SC City of Chaska, Minnesota, USA § SGT-800 in peaking application located in City of Chaska, Minnesota, USA providing power to the Minnesota Municipal Power Agency § Remote monitoring by an energy services company located 40 km from Chaska § Dual fuel combustors with DLE meets the emission limits without water injection § In operation since 2002 41 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

SGT-800 Industrial gas turbine Solution to worldwide customer demands § Simple and robust design for reliable operation § Low emissions for environmental compliance at full and part load § Excellent in combined cycle § Compact layout § Competitive life-cycle cost 43 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

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. 44 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP

Please address all correspondence to: Siemens Industrial Turbomachinery AB SE-612 83 Finspong Sweden © Siemens Industrial Turbomachinery AB No part of this document may be reproduced or transmitted in any form or by any means, including photocopying and recording without the written permission of Siemens Industrial Turbomachinery AB 45 © Siemens Industrial Turbomachinery AB 2011. All rights reserved. SGT-800 E O IP