4 th EU Sout Africa Clean Coal Working Group Meeting

Transcription

1 4 th EU Sout Africa Clean Coal Working Group Meeting Hybrid Concentrated Solar Power (CSP) Concept Case Study for the Medupi Power Stationy Falk Hoffmeister Head of Sales and Business Development. Dr. Christian Bergins Head of R&D Hitachi Power Europe GmbH

2 Medupi and its potential for hybrid CSP Hitachi at a glance Medupi & Kusile Steam Generator Design Case Study Medupi Hybrid CSP Outlook List of open points 1

3 Key figures Hitachi, Ltd. as of 31 March 2011 Information & Telecommunication Systems Income* 1,188 Sales 19,904 Power Systems 265 9,798 Social Infrastructure & Industrial Systems ,939 Electronic Systems & Equipment ,004 Construction Machinery 593 9,053 High Functional Materials & Components ,966 Automotive Systems 287 8,890 Components & Devices 526 9,757 Digital Media & Consumer Products ,465 Financial Services 172 4,494 Others 349 9,247 * Operating Income, Eliminations Corporate Items: (153)**, (14,278)*** 5,356** Mio. US $ 112,239*** Mio. US $ Net Sales Total Employees, worldwide 360,000 2

4 The Power Systems Division of Hitachi, Ltd. Power Systems and Equipment Thermal power plants Nuclear power plants Hydroelectric power plants Substations and power conversion equipment Air quality control systems 3

5 Hitachi Power Business Global Structure Hitachi Power Systems Canada Ltd. BGR Turbines Company Private Limited BGR Boilers Private Limited Hitachi Power Europe GmbH Power Systems Company Babcock-Hitachi K.K. Babcock-Hitachi (Hangzhou) Environmental Equipment Co., Ltd. (Established June 2011) Hitachi Power Systems America, Ltd. Hitachi Power Africa Pty. Ltd. Core Group companies Sales bases Service bases Manufacturing and engineering bases Procurement bases 4

6 Hitachi Power Africa Main business activities Conventional power plants Coal fired EPC power plants Power train Utility steam generators Firing systems Mills Ash handling systems Flue gas cleaning systems Steam turbines (Hitachi, Ltd.) Combined-cycle power plants Gas turbines (Hitachi, Ltd.) Service and Maintenance Rehabilitation Modernisation Service Spare parts New Technologies Carbon Capture - Technology Renewable Energy & Smart Community Solutions 5

7 Medupi and its potential for hybrid CSP Hitachi at a glance Medupi & Kusile Steam Generator Design Case Study Medupi Hybrid CSP Outlook List of open points 6

8 Medupi/ Kusile Power Station, South Africa 6 x 794 MWel / 2290 t/h Benson steam generator Medupi mine bituminous coal Operation parameters: SH: 564 C / 258 bar RH: 572 C / 53.2 bar Net efficiency (LHV): > 40 % 5 Mills type MPS DS burner, 78 MW each Commissioning:

9 Medupi & Kusile Steam Generator Design Overall plant design 8

10 Medupi and its potential for hybrid CSP Hitachi at a glance Medupi & Kusile Steam Generator Design Case Study Medupi Hybrid CSP Outlook 9

11 Case Study Medupi Hybrid CSP Overview Solar Steam Generation for Existing Coal-Fired Power Plants 610 C / 55 bar 800 MW el HP IP LP1 LP2 G Coal fired power plant with solar heat integration 1490 MW th 149 MW th fossil solar 10

12 Case Study: Medupi Hybrid CSP Hybrid CSP (Concentrated Solar Power) Solar radiation: 2527 kwh/m² per year 11

13 Case Study: Medupi Hybrid CSP Hybrid CSP Solar radiation: 2527 kwh/m² per year Study items Fresnel system for feed water preheating Combination of direct steam injection (IP) and feed water preheating Parabolic trough system for feed water preheating for direct steam injection (IP) HP IP LP1 LP2 G solar fossil 12

14 Case Study: Medupi Hybrid CSP Investigated Hybrid CSP concepts Steam Kessel Generator HD HP MD IP 2 x ND IP mechanische Verluste Generator G Air Luftkondensator cooled condenser Speisewassertank Feed water M M M M M HP HD-Vorwärmung pre-heating Solar field Speisewasserpumpe Feed water pumps ND-Vorwärmung LP pre-heating 13

15 Case Study: Medupi Solar Argumentation Linear focussed Solar collectors Characteristics of different Solar collector types Parabolic through Higher temperature level Higher optical efficiency Utilisation of thermo oil as heat transfer medium (HTF) => additional heat exchanger Utilisation of water under development Fresnel collectors Smaler surface area Cheaper per m² mirror area, but larger mirror area Utilisation of water as HTF => no additional heat exchanger Source: [Quaschning, 2009] 14

16 Case Study: Medupi Solar Argumentation Linear focussed Solar collectors Characteristics of different Solar collector types Parabolic through Higher temperature level Higher optical efficiency Utilisation of thermo oil as heat transfer medium (HTF) Utilisation of water under development Fresnel collectors Smaler surface area Cheaper per m² mirror area, but larger mirror area Utilisation of water as HTF 15

17 Case Study: Medupi Solar Argumentation Basic assumptions Basic assumptions Technical feasibility study assuming availability of land and water around the Medupi Power Station Plant performance data from Medupi power station Constant plant output during hybrid CSP operation (reduced coal consumption = > reduced greenhouse gases) DNI from MESoR project; annual solar radiation for Medupi: 2527 kwh/m² Simulation tool Ebsilon including special models for Fresnel and Parabolic Trough collectors 16

18 Case Study: Medupi Solar Argumentation Basic assumptions Ebsilon Models for CSP technology Fresnel collector model M M 1 / / 23 Fresnel collector representative for 1 row Parabolic through collector model thermo oil cycle M 1 / / 72 parabolic trough collectors arranged U-type 17

19 Net electric efficiency considering coal only [%] Case Study: Medupi Solar Argumentation Net electric efficiency considering coal only Parabol Bypass Parabol, HP heater bypass Parabol ZÜ- Einspeisung Parabol, RH steam Fresnel Bypass Fresnel, HP heater bypass Fresnel ZÜ- Einspeisung heater Fresnel, RH steam + HP Ohne Solar PP as designed

20 Case Study: Medupi Solar Argumentation Land demand and collector area Gross area 0,680 Area [km²] Net area 0,222 Net area 0,248 Gross area 0,455 0 Parabolic trough Fresnel collector 19

21 Medupi and its potential for hybrid CSP Hitachi at a glance Medupi & Kusile Steam Generator Design Case Study Medupi hybrid CSP Conclusion List of open points 20

22 Case Study: Medupi Solar Argumentation Results / Conclusion Steam Generator Steam Generator load during hybrid operation is depending on the scenario between % BMCR Compensation of different steam generator water/steam conditions via air ratio Maximum coal reduction ca. 7.5 % (annual average %), which is between 44,250 and 48,130 to => annual CO 2 reduction 74,600 81,200 to Overall plant Fresnel technology for HP heater bypass economically the most viable option (CO 2 abatement cost: 68 /to CO 2 Fresnel versus 156 /to CO 2 Parabolic Trough Required area 0.25 km² (net) or 0.45 km² (brutto) for Fresnel 21

23 Hitachi Power Europe GmbH Unternehmenspräsentation 2010