Page 1 May 08 Energy – Fossil Power Generation 700°C Steam Turbine for highest efficiency Energy – Fossil Power Generation 700°C Steam Turbine – Challenges Coal fired steam power plants are still main contributors to fossil power production Additional power demand and replacement of aging power plants require new installations Fuel prices, CO 2 tax and carbon capture negatively impact cost of electricity and power plant efficiencies Customers demand high cycle efficiencies to compensate for these effects Source Siemens PG GS Worldwide electricity generation Other Renewables PWh 2006 2030 19 34 2.5 % p.a. Fossil Fuels 64% 6% 16% 15% 21% 40% Natural Gas 22% Hydro 15% Nuclear 13% Oil 3% Coal 39% 2% 8%
Transcript
Page 1 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation 700°C Steam Turbine – Challenges
Coal fired steam power plants are still main contributors to fossil power production
Additional power demand and replacement of aging power plants require new installations
Fuel prices, CO2 tax and carbon capture negatively impact cost of electricity and power plant efficiencies
Customers demand high cycle efficiencies to compensate for these effects
Source Siemens PG GS
Worldwide electricity generation
OtherRenewablesPWh
2006 2030
19
34
2.5 % p.a.
Fossil Fuels64%
6%
16%
15%
21%
40%
NaturalGas22%
Hydro15%
Nuclear13%
Oil 3%
Coal39%
2%
8%
Page 2 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Innovative Step
Increase steam power plant efficiencies by rising main steam parameters
Increase temperature (+100°C) Increase pressure (+100 bar)
For maximized gain raise pressure and temperature at the same time
Temperature
Pre
ssur
e
Gas Turbines25 bar / 1400°C
700°C Steam Turbine350 bar / 700°C
ConventionalSteam Turbines250 bar / 600°C
increase
To raise plant efficiency raise Carnot efficiency
To raise Carnot efficiency raise temperature!
hot
coldC T
T1
Carnot Efficiency
Page 3 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Implementation
Increased material strength at higher temperatures needed: conflicting demands
Measure: use of Nickel alloys in major turbine components
First application of expensive Nickel alloys for thick-walled and heavy parts > 10 tons
New technologies, cooling and design concepts, production
processes
Nickel Alloy Forging
Nickel Alloy Casting
Page 4 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Innovation
Major Research Work on Thermal Turbine Design Mechanics, especially long term
behaviour Materials (alloy properties) Manufacturing (casting and
machining)
Yields Technological leap in steam
turbine design Entire new generation of steam
turbines
cold
hot
Page 5 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Customer Value
Increased customer value due to
Increased power plant efficiency
Approximately 7% less fuel consumption and CO2 emission
Means to compensate for efficiency deficit due to carbon capture
No cut backs on reliability and operational flexibility
Goal: > 50% net efficiency
State of the art: 46% net efficiency
approx. 7% less fuel
and CO2
Page 6 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Siemens currently in leadingposition for 700°C steam turbine technology
Target: Development of 700°C full-scale pilot plant together with e.on by 2014
Of special interest with increasing emission tax
Planned scale-up to large plant size >800MW when operation experience is available
Potential to replace a part ofcurrent high-end steam power plant market
Market entry expected after 2015
Market success
Energy – Fossil Power Generation700°C Steam Turbine – Market success
Market potential
only ST > 115 MW (F-Market)
GW
0
20
40
60
80
100
2000 2002 2004 2006 2008 2010 2012 2014 2016
Market potential for 700°C ST
STPP Super Critical
STPP Sub Critical
ST in CCPP
ST in NPP
Source PMD2
Page 7 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Innovation Process
Based on long term development Participation in European
research programs Utilization of common
“Mülheim inventor days”with gas turbine, generator and steam turbine engineering
Conduct internal concept workshops
Simultaneous multi-field research in engineering, materials and manufacturing
Source E.ON
Page 8 May 08 Energy – Fossil Power Generation700°C Steam Turbine for highest efficiency
Energy – Fossil Power Generation700°C Steam Turbine – Lessons learnt
Improvements in performance, costs and operational flexibility
