Enhanced Platform The next generation of reliable and highly efficient Siemens industrial steam turbines

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1 / Katja Riebisch - Siemens AG - Industrial Power Enhanced Platform The next generation of reliable and highly efficient Siemens industrial steam turbines

2 Industrial Steam Turbine Applications Electrical Power Generation Biomass power plants Waste combustion power plants Combined cycle power plants Heat and Power plants Solar power plants Steam Conditioning Pulp and Paper industry Mining industry Chemical and petrochemical industry Mechanical Drives Pumps Blower Compressors Page 2

3 The Heritage of Siemens Industrial ST Technology SST-010 SST-050 SST-060 SST-100 SST-110 SST-120 SST-150 SST-200 SST-300 SST-400 SST-500 SST-600 SST-800 SST-700 SST Page 3

4 Motivation Internal drivers Acquisition history led to overlap in product portfolio and power range Huge variation of Steam Turbine Types incl. the maintenance of the tools Implementation of advantages of all families into one product Incorporation of new state of the art features External requirements Use of state of the art design allowing significant gains Extended features e.g. optimized start-up time Extended operating capabilities Increased flexibility to adapt to customer needs Increased efficiency Improved economical solutions Page 4 Enhanced Platform

5 Customization Turbine configurations including a high degree of flexibility to realize optimal turbine solutions according customer needs Fix speed direct / geared drive and variable speed turbine solutions including different exhaust and installation arrangements High flexibility in number of steam extractions (controlled and/or uncontrolled) High flexibility in the extracted total mass flow / volumetric flow conditions High flexibility in the electrical output power level according customer requirements Different standard turbine arrangements and installations allow customization Page 5 Enhanced Platform

6 Building Block Approach Using predefined components to cover different turbine solutions and applications The Enhanced Platform is not a product line The Enhanced Platform is a technology platform allowing to realize different product lines such as customized and standardized turbine configurations as single and multi casing solutions Combination of benefits from all Siemens product lines considering state of the art developments/technologies Based on the Enhanced Platform technology the Siemens product lines will be improved and extended in their application fields Page 6

7 Key Parameters Power output Speed MW rpm Live steam Inlet pressure/temp 165 bar / 565 ºC Inlet pressure/temp 2393 psi / 1049 ºF Controlled extractions (up to 2) Pressure, ext. valve 72 bar / 1044 psi Pressure, int. valve 55 bar / 798 psi Temperature 480 ºC / 895 ºF Bleeds (up to 6) Exhaust conditions Back-pressure Condensing District heating 85 bar / 1233 psi 80 bar / 1160 psi 1.0 bar / 15 psi 3.0 bar / 43 psi Improvements Power output +75 MW Inlet temperature +25 K Extraction pressure +20 bar / 290 psi Page 7

8 Modularization Steam Admission Section Intermediate Section Exhaust Section Maximum flexibility due to standardization at sub-part level Page 8

9 Turbine Configurations Different casing configurations allow optimized customer solution focused on efficiency and cost Front Steam Admission Center Steam Admission Optimized casing structure provides reduced start-up times Different design solutions provides customized competitive turbine solutions Specialized options allow high temperatures with short heat-up times as well as competitive solutions for low steam parameters Conventional design steam admission Page 9 Improved steam admission design including homogenous casing structure

10 Blading and Sealing Improved blade profiles and material know-how provide highest efficiency Improved cylindrical HP blades and conical (twisted) IP blades allow longer airfoils Improved sealing systematic allows more sealing strips per blade row at both moving and stationary 3D optimized HP/IP blades reach highest efficiency, still allowing simple processes in sales, engineering, and production due to predefined sub-components Application of well proven Standard stages for both fix and geared application Page 10 Standard SST-xxx (old) customized blade path according customer request (load points) Standard SST-xxx Enhanced Platform (improved) customized blade path according customer request (load points)

11 Standard Stages Best solutions according customer boundary conditions and requirements Typ E&EL Beschaufelung Typ C Beschaufelung Different Standard Stages available within the Enhanced Platform building block system for optimal solutions E&EL standard stages for 50 and 60 Hz application C blades for geared application V and SK for variable speed application HS for variable speed at high maximum operational speed (Titanium SK blading) Page 11 Typ SK/HS Beschaufelung TypV Beschaufelung

12 Extractions Full scope of extraction possibilities at even higher parameters provides additional options for thermal cycles External valves Internal valves Up to 7 extractions in total per casing Pressure up to 72 bar/1044 psi Controlled extractions (up to 2) External valves 72 bar/1044 psi (flexible valve combinations) Nozzle group control 55 bar / 798 psi (up to 4 internal valves) Adaptive stage Grid valve Uncontrolled extractions / bleeds (up to 6) Adaptive stage Gridvalve Page 12

13 Exhaust Constructions Extended range of exhausts allows larger condensing stages and higher back-pressures Radial and axial exhaust casings for condensing applications Exhaust pressure up to 1.0 bar in combination with air- or water-cooled condensers Last stage blade sizes up to 8.7 m² (fixed speed) respectively 4.5 m² (geared or mechanical drives) Various possibilities for bleeds Page 13

14 Design Philosophy and Criteria Applying State-of-the-Art design philosophies and tools to ensure best technical solutions and reliability Design of steam turbine components according to expected life time and service load combination Design and operation of the steam turbine according to total exhaustion Consideration of both Steady state operation Non-steady state operation Page 14

15 Test & Verification Extended test and verification using a real steam Full load test using a 10 MW power back-pressure extraction turbine Investigation of Dynamic Blading behavior Performance measurement and validation of the loss model Controlling behavior using the butterfly inlet Steam Turbine Key Data Out power: 10 MW Live steam conditions: 70 bara / 476 ºC Operational speed: 9000 rpm Load control: water friction brake Page 15

16 Improved CO 2 Footprint Optimized material application and improved performance lead to a CO 2 emission reduction of up to 15% over life time Long-term experiences in material behavior lead to efficient material inventory for all components and result in a total turbine weight reduction Applying pre-standardized components leads to reductions in both engineering and manufacturing effort Less total weight leads to benefits for both packaging and logistic [t CO 2 eq] Building Block (SBB) Enhanced Platform Page 16

17 Conclusion Higher live steam parameter Long life cycle increased life time Best technology features under common umbrella Improved flexibility for optimized customer solutions Improved CO 2 footprint (15 % reduction of CO 2 emissions) Optimierte Effizienz Extensive tested and verified first turbine Improved efficiency (up to 2 %) Improved design for reduced start-up times Page 17

18 Thank you for your attention! Page 18 Dr. L. Lutz Völker / K. Riebisch