1. State of the art of combined cycle power plants south of Graz Energy efficiency conference Vienna 21 st October 2004 Authors: DI Josef Tauschitz DI Martin Hochfellner The 800 MW combined cycle power plant project

2. 21. Oktober 2004 VERBUND - Austrian Thermal Power 2 AGENDA Short description of Verbund - Austrian Thermal Power Overall environment for new thermal power plants State of the art of modern gas turbines and CCGT plants The 800 MW CCGT project Mellach

3. 21. Oktober 2004 VERBUND - Austrian Thermal Power 3 N I N N Zeltweg St. Andrä Mellach Korneuburg Wien Graz Niederösterreich Kärnten DONAU M U R Installed capacity year 2000 : 1.964 MW Conservation of capacity until 2007 : 1.089 MW (planned) Capacity in 2007 : 815 MW New CCGT, start of operation 2009 : 800 MW (planned) Capacity in 2009: app. 1600 MW Verbund - Austrian Thermal Power

4. 21. Oktober 2004 VERBUND - Austrian Thermal Power 4 Dürnrohr Korneuburg Zeltweg Pernegg 1+2 Voitsberg Mellach Neudorf- Werndorf 1+2 1 2 St. Andrä Thermal power generation capacity in Austria Austria Total 0 1000 2000 3000 4000 5000 6000 7000 Year 2000 Year 2007 CCGT Project Mellach 0 1000 2000 3000 4000 5000 6000 7000 Austria Nord 0 1000 2000 3000 4000 5000 6000 7000 Austria South

5. 21. Oktober 2004 VERBUND - Austrian Thermal Power 5 Overall environment for new power plants Reduction of non profitable generating capacities Building activity of new generating capacity on a very low level Over-aging of existing power plants Annually increase of 1,6 % of the electricity consumption Demand for new capacity is given the project can only be realized if it shows competitiveness uncertainties are : restrictions in CO2-emissions gas price development environmental restrictions which could lead to high investment costs

6. 21. Oktober 2004 VERBUND - Austrian Thermal Power 6 400MW State of the art of gas turbines and CCGT plants Efficiencies of gas turbines and CCGT plants 10 MW100 MW1000 MW

7. 21. Oktober 2004 VERBUND - Austrian Thermal Power 7 State of the art of gas turbines and CCGT plants Specific investment costs

8. 21. Oktober 2004 VERBUND - Austrian Thermal Power 8 State of the art of gas turbines and CCGT plants Electricity generation costs 10 MW100 MW1000 MW

9. 21. Oktober 2004 VERBUND - Austrian Thermal Power 9 available gas-turbinesin development / in test ProducerAlstomSiemensGEMitsubishiGEMitsubishi Type --GT 26V94.3AGE 9FB701F3GE 9H701H Gas turbine capacityMW274276269270 334 Gas turbine exhaust temp.°C630585622586 587 CCGT capacity (ISO)MW405407412398480483 GT-efficiency at 100% load%Mean value = 38,739,5 CCGT-efficiency at 100% load%Mean value = 57,960 Available gas turbines in the 270 MW class State of the art of gas turbines and CCGT plants

10. 21. Oktober 2004 VERBUND - Austrian Thermal Power 10 Development of GT-efficiency State of the art of gas turbines and CCGT plants

11. 21. Oktober 2004 VERBUND - Austrian Thermal Power 11 State of the art of gas turbines and CCGT plants Part load efficiency of CCGT plants

12. 21. Oktober 2004 VERBUND - Austrian Thermal Power 12 Decrease of CCGT-capacity and –efficiency in long time operation loss of capacity loss of efficiency State of the art of gas turbines and CCGT plants

13. 21. Oktober 2004 VERBUND - Austrian Thermal Power 13 Emission limits State of the art of gas turbines and CCGT plants

14. 21. Oktober 2004 VERBUND - Austrian Thermal Power 14 State of the art of gas turbines and CCGT plants typical NOx and CO emission depending on the load NOx and CO-emission limits

15. 21. Oktober 2004 VERBUND - Austrian Thermal Power 15 The 800 MW CCGT project Mellach View at the new CCGT plant Mellach

16. 21. Oktober 2004 VERBUND - Austrian Thermal Power 16 The 800 MW CCGT project Mellach CCGT power plant TAG – Trans Austria Gas pipeline Connection to the high voltage grid cooling water system district heating system Plant layout

17. 21. Oktober 2004 VERBUND - Austrian Thermal Power 17 Technical data of CCGT Net capacity of CCGT 800 MW Capability of district heat supply 250 MW Net efficiency in condensing mode 57% - 58 % Net efficiency when supplying 250MW district heat 70 % NOx-Emission at load >60% (SCR installed) 20 mg/Nm3 NOx-Emission at low load 35 mg/Nm3 The 800 MW CCGT project Mellach

18. 21. Oktober 2004 VERBUND - Austrian Thermal Power 18 2003200420052006200720082009 preliminary works environmental impact analysis tendering and order of plant design, manufacture, erection commissioning commercial operation The 800 MW CCGT project Mellach Project timetable

19. 21. Oktober 2004 VERBUND - Austrian Thermal Power 19 The 800 MW CCGT project Mellach