Steam Turbines. In addition Ansaldo Energia offers a complete line of geothermal steam turbines from 20 MW to 150 MW. MT10 Steam Turbine

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1 STEAM TURBINES

2 Steam Turbines MT10 Steam Turbine Ansaldo Energia has 100 years experience in the design, manufacturing and installation of steam turbines. It has supplied about 700 steam turbines worldwide with a total capacity of nearly 100 GW. Dedicated R&D and Service organizations assist Clients with continuous product improvements, combined with the traditional reliability and robustness of Ansaldo Energia products: the result is a unique and balanced value package based on innovation and reliability. Ansaldo Energia has a comprehensive portfolio of 50 Hz and 60 Hz non-reheat and reheat steam turbines ranging from 40 MW to 1000 MW for conventional steam cycles, combined cycles and cogeneration applications. In addition Ansaldo Energia offers a complete line of geothermal steam turbines from 20 MW to 150 MW. MT15 Steam Turbine RT30 Steam Turbine Types and applications Series Reheat Turbines Thermal Fossil-fired Steam Cycles Combined Cycles Cogeneration Plants Solar Plants 3 to 5-cylinder: RT30, R cylinder: MT Non-Reheat Turbines Thermal Fossil-fired Steam Cycles Combined Cycles Cogeneration Plants Solar Plants Geothermal Turbines Geothermal Cycles 2-cylinder: MT cylinder: MT GT ,000 Power output [MW]

3 Advanced design features Modular design concept Ansaldo Energia steam turbines are based on a modular concept to reduce technical risk and manufacturing time and ensure high reliability. Each model is a combination of well-proven, pre-engineered modules of different sizes, to provide a broad range of power ratings and applications. Several different material options are available to meet different steam conditions up to the most advanced ultra supercritical parameters (600 C/620 C). Steam Turbine IP/LP rotor Blading Over the years of its technological history, Ansaldo Energia has designed both impulse and reaction steam turbines. Today Ansaldo Energia steam turbines are based on reaction technology, while the impulse design is maintained in geothermal and small-size steam turbines. All blades have 3D airfoil design to maximize stage efficiency, achieving 92% of efficiency in the HP section and 94% in the IP section. LP last stage blading The development of longer last stage blades is one of the most effective solutions to achieve a compact and a highly efficient turbine design. A family of modern last stage blades up to 48 is available, with free standing or coupled solution, to satisfy any cooling condition and back pressure requirements. 48 last stage blade

4 Separate HP and IP sections Generally, Ansaldo Energia steam turbines for reheat applications have separate HP, IP and LP sections to deliver the highest possible sustained efficiency and good thermal flexibility. For output up to 300 MW, a compact, combined, single flow IP/LP solution is available, thanks also to the use of the welding technique used for the IP/LP rotor. Shrink ring design The HP inner casing of reheat turbines has a shrink ring design that does not require any massive horizontal flange. The shrink rings hold the two half inner casings together to form a symmetrical, light geometry with uniform mass distribution. They are assembled or removed by heating them with annular gas burners. The advantages of this solution are: rapid start-up and shut-down and excellent behavior during load changes simple dismantling and reassembly during maintenance Steam Turbine with lateral exhaust Axial and side exhaust arrangement In addition to the traditional downward exhausts for single and double flow configurations, low pressure modules are available for single flow axial exhaust or double flow side exhaust to the condenser. Axial and side exhaust modules, developed primarily for combined cycle applications, allow installation of the turboset on low foundations, minimising overall foundation costs and reducing the overall height of the machine building. HP section shrink ring design

5 Welded rotors Ansaldo Energia uses the welding technique for rotor manufacturing, in which the rotors are built from forged disks and welded together using a combination of tungsten inert gas and submerged arc processes in a dedicated rotor welding shop. This technique allows the use of different materials for HP, IP and IP/LP rotors, providing high temperature resistance at the hot end and high toughness at the cold end, and allowing large LP rotors to be manufactured from smaller forgings. Moreover welded rotors have better thermal flexibility, which is a significant advantage for startup, shut-down and load changes. LP rotor welding in Ansaldo Energia factory Reheat Steam Turbines Configurations MT15 ( MW) RT30 ( MW) RT70 ( MW)

6 Product Line Steam Turbines for Conventional Steam Cycles Today s medium and large power generation steam turbines are mainly reheat type with regenerative feed water cycle and possible district heating applications. Ansaldo Energia offers three steam turbine models, specifically designed to satisfy all possible Client requirements in terms of operating conditions, performance and reliability, including steam turbines for ultra supercritical applications. MT15 Separate High Pressure (HP) and combined Intermediate / Low Pressure (IP/LP) cylinders RT30 Separate High Pressure (HP), single flow Intermediate Pressure (IP) and Low Pressure (LP) cylinders RT70 Separate High Pressure (HP), double flow Intermediate Pressure (IP) and Low Pressure (LP) cylinders Rating [MW] Steam Turbines for Combined Cycles Steam turbines for reheat and non-reheat combined cycles must be easy to adapt to different gas turbine configurations (number and models) and steam conditions delivered by various heat recovery steam generators. Ansaldo Energia offers four steam turbine models able to meet the full range of Client requirements and all specific site conditions. NON REHEAT MT10 Combined High Pressure / Low Pressure (HP/LP) cylinders MT20 Separate High Pressure (HP) and Low pressure (LP) cylinders REHEAT MT15C Separate High Pressure (HP) and combined Intermediate / Low Pressure (IP/LP) cylinders RT30C Separate High Pressure (HP), Intermediate Pressure (IP) and Low Pressure (LP) cylinders Rating [MW] 400

7 Cogeneration Steam Turbines These turbines, either back pressure or condensing, with or without controlled extractions, are used in industrial, desalination and district heating power plants. As it is basically the process that dictates the steam parameters and therefore the turbine design, each cogeneration steam turbine is a unique product, tailored to the specific needs of the Client. Applications The following references show examples of the aforemetioned product lines. Steam Turbines for Conventional Steam Cycles Avedøre 2 - Denmark Cl t: SK Energy Ansaldo Energia scope of supply: Power Block including one RT30 steam turbine and generator Power output: 535 MW Steam parameters: 300 bar/580 C/600 C Commercial operation: 2001 Steam Turbines for Combined Cycles Sidi Krir and El Alf - Egypt Client: W.D.E.P. 2x(2+1) Combined cycles with F class gas turbines Ansaldo Energia scope of supply for plant: one RT30 steam turbine, turbogenerator, condenser, bypass Power output: 275 MW Steam parameters: 125 bar/565 C/565 C Commercial operation: 2010 Cogeneration Steam Turbines Barka I - Oman Client: ACWA Power 2+1 Combined cycle desalination plant with E class gas turbines Ansaldo Energia scope of supply: two AE94.2 gas turbines, one MT20 steam turbine and relative generators Steam turbine power output: 220 MW Steam parameters: 77 bar/541 C Commercial operation: 2003

8 Ansaldo Energia Steam Turbines References in the World Stampa: Microart Recco - Genova 05/2012 Petergraf DENMARK (2) 967 MW RUSSIA (1) 167 MW USA (8) 276 MW MEXICO (21) 2,365 MW JAMAICA (1) 33 MW GUATEMALA (1) 53 MW NICARAGUA (5) 221 MW COSTA RICA (1) 55 MW VENEZUELA (3) 99 MW PANAMA (3) 120 MW PUERTO RICO (2) 150 MW BRAZIL (7) 674 MW EQUADOR (1) 132 MW CHILE (7) 1,483 MW SPAIN (1) 273 MW UK (5) 308 MW ITALY (355) 50,921 MW MOROCCO (8) 900 MW ARGENTINA (12) 1,587 MW FRANCE (3) 1,375 MW ALGERIA (7) 1,000 MW COTE D IVOIRE (2) 150 MW URUGUAY (1) 125 MW BELGIUM (4) 1,123 MW TUNISIA (3) 509 MW EGYPT (9) 2,066 MW BOTSWANA (1) 64 MW LYBIA (2) 40 MW AUSTRIA (1) 160 MW YEMEN (9) 325 MW ZIMBABWE (2) 440 MW SOUTH AFRICA (1) 50 MW SYRIA (6) 598 MW LABANON (7) 940 MW JORDAN (5) 365 MW MALTA (4) 85 MW BAHRAIN (4) 121 MW CHINA (7) 2,139 MW OMAN (1) 220 MW OTHER MIDDLE EAST (23) 4,721 MW GREECE (6) 891 MW UAE (12) 875 MW INDIA (12) 2,016 MW CROATIA (1) 320 MW TURKEY (5) 782 MW SAUDI ARABIA (19) 1,908 MW ALBANIA (1) 30 MW SOUTH KOREA (1) 200 MW THAILAND (3) 225 MW MALAYSIA (1) 99 MW PHILIPPINES (2) 110 MW INDONESIA (4) 225 MW AUSTRALIA (2) 850 MW PAKISTAN (7) 1,792 MW Ansaldo Energia Steam Turbine references since 1950 are here represented Genova - Via N. Lorenzi, 8 - Italy Tel: Fax: ansaldoenergia@aen.ansaldo.it ansaldoenergia.com