Power Generation 1

P11M Wieghardt

2005-10-27

Siemens Steam Turbine Design for AD700 Power Plants(AD700 financed activities)

Kai Wieghardt

2005-10-27 Power Generation 2P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

Contents

1. Thermodynamics, Arrangement & Materials

2. HP Turbine Design

3. IP Turbine Design

4. Turbine Valves Design & COMTES700

5. Summary

2005-10-27 Power Generation 3P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

700°C/720°C Turboset (400 MW Single RH)Water Steam Cycle and Turbine Arrangement

350bar / 700°C / 270kg/s

60bar / 720°C / 220kg/s

5bar / 320°C / 180kg/s

64bar / 410°C

HP IP LP

2005-10-27 Power Generation 4P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

350/700°C

60/720°C

285/600°C

64/355°C

64/410°C

60/620°C

HP

IP

700°C HP Turbine:↑ Inlet temperature↑ Inlet pressure↑ Enthalpy drop

720°C IP Turbine:↑ Inlet temperature~ Inlet pressure~ Enthalpy drop

5/320°C

LP4.5/230°C

Steam Cycles 600°C/620°C vs. 700°C/720°CIP Turbine

2005-10-27 Power Generation 5P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

350/700°C

64/410°C

Solution: Barrel type HP Turbine design with Cooling

• Pressure containment in vessel without horizontal flanges• Symmetric inner casing without internal pressure• Best possible containment of hot main steam

700°C HP Turbine:↑ Inlet temperature↑ Inlet pressure↑ Enthalpy drop

Steam Cycles 600°C/620°C vs. 700°C/720°CConclusions for HP Turbine Design

2005-10-27 Power Generation 6P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

700°C HP TurbineLongitudinal Section with External Cooling

Exhaust steam 64bar / 410°C

Cooling steam from MS heater Main steam 350bar / 700°C

HP IP

2005-10-27 Power Generation 7P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

60/720°C

Solution: Proven design using Superalloys and Cooling

5/320°C

Steam Cycles 600°C/620°C vs. 700°C/720°CConclusions for IP Turbine Design

IP

720°C IP Turbine:↑ Inlet temperature~ Inlet pressure~ Enthalpy drop

4.5/230°C

60/620°C

2005-10-27 Power Generation 8P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

720°C IP TurbineLongitudinal Section with External Cooling

Hot Reheat steam 60bar / 720°C

Exhaust steam 5 bar / 320°C

Cooling steam from CRH

HP IP

2005-10-27 Power Generation 9P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

720°C IP TurbineWelded Rotor Design

2005-10-27 Power Generation 10P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

Test of a critical 700°C Turbine Component:COMTES700 Turbine Valve

COMTES700 Turbine Valve Test• Test Phase 2005 – 2009• Full-scale component (4000kg)exposed to 210 bar / 705°C

• Main objectives:• Sliding & contact surfaces• Creep & LCF• Volumetric contraction

• 100% privately financed

2005-10-27 Power Generation 11P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

COMTES700 Turbine ValveErected Valve with Actuator

2005-10-27 Power Generation 12P11MWieghardt

AD700 Siemens Turbine Designs, AD700 Conference, Milan

Siemens AD700 Turboset for 350bar/700°C/720°C has a classical HP-IP-LP arrangement

HP turbine with proven barrel type design by using an innovative external cooling concept

IP turbine with proven design and external CRH cooling

Main steam and reheat valves with proven design

Further 700°C development steps are necessary including lessons learned from COMTES700 (design optimisation, materials testing, design philosophy)

Siemens is engaged for this with large private investment.

Summary