State of the art of combined cycle power plants

south of Graz

Energy efficiency conference

Vienna

21st October 2004

Authors:DI Josef Tauschitz

DI Martin Hochfellner

The 800 MW combined cycle power plant project

21. Oktober 2004VERBUND - 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

21. Oktober 2004VERBUND - Austrian Thermal Power 3

Voits-berg

Pernegg

Neudorf-Werndorf

DONAU

Dürnrohr

SA

LZAC

H ENNS

INN

INN

Zeltweg

St. Andrä

Mellach

Korneuburg

Wien

Graz

Niederösterreich

Kärnten

DONAU

MUR

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

Production 2003: 5,97 TWh

Fuel Mix

9 % oil

91 % coal

21. Oktober 2004VERBUND - Austrian Thermal Power 4

Dürnrohr

Korneuburg

Zeltweg Pernegg 1+2

VoitsbergMellach

Neudorf-Werndorf 1+2

12

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“

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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 developmentenvironmental restrictions which could lead to high investment costs

21. Oktober 2004VERBUND - Austrian Thermal Power 6

0%

10%

20%

30%

40%

50%

60%

0,0 0,5 1,0 1,5 2,0 2,5 3,0

Log(10) of gas turbine capacity

Eff

icie

ncy (

%)

5MW

50 MW250MW

CCGT unit

gas turbine

400MW

State of the art of gas turbines and CCGT plants

Efficiencies of gas turbines and CCGT plants

10 MW 100 MW 1000 MW

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State of the art of gas turbines and CCGT plants

Specific investment costs

0%

50%

100%

150%

200%

250%

0 100 200 300 400 500 600 700 800

Capacity of CCGT (MW)

spec

ific

inve

stm

ent

cost

s (

%)

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State of the art of gas turbines and CCGT plants

Electricity generation costs

0%

20%

40%

60%

80%

100%

120%

140%

160%

180%

1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0

log(10) of CCGT Capacity (MW)

Gen

erat

ion

Co

sts

(%)

10 MW 100 MW 1000 MW

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    available gas-turbines in development / in test

Producer Alstom Siemens GE Mitsubishi GE Mitsubishi

Type -- GT 26 V94.3A GE 9FB 701F3 GE 9H 701H

Gas turbine capacity MW 274 276 269 270   334

Gas turbine exhaust temp. °C 630 585 622 586   587

         

CCGT capacity (ISO) MW 405 407 412 398 480 483

GT-efficiency at 100% load % Mean value = 38,7 39,5

CCGT-efficiency at 100% load % Mean value = 57,9 60 60

Available gas turbines in the 270 MW class

State of the art of gas turbines and CCGT plants

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Development of GT-efficiency

State of the art of gas turbines and CCGT plants

26

28

30

32

34

36

38

40

1975 1980 1985 1990 1995 2000 2005 2010

year

gas

tu

rbin

e ef

fici

ency

9FB

21. Oktober 2004VERBUND - Austrian Thermal Power 11

State of the art of gas turbines and CCGT plants

Part load efficiency of CCGT plants

80%

82%

84%

86%

88%

90%

92%

94%

96%

98%

100%

30% 40% 50% 60% 70% 80% 90% 100%

Load %

rela

tive

eff

icie

ncy

(10

0%lo

ad /

par

t lo

ad)

21. Oktober 2004VERBUND - Austrian Thermal Power 12

0,00

0,50

1,00

1,50

2,00

2,50

3,00

3,50

4,00

4,50

0 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 90.000 100.000

operating hours [EOh]

Lo

ss [

%]

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

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Emission limits

EU-LCP regulation Austrian Regulationload>70%

NOx (mg/Nm3) 50 35CO (mg/Nm3) - 35

State of the art of gas turbines and CCGT plants

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State of the art of gas turbines and CCGT plants

typical NOx and CO emission depending on the load

0

10

20

30

40

50

60

70

80

90

100

30% 40% 50% 60% 70% 80% 90% 100%

Load Factor

Em

issi

on

mg

/Nm

3

CO

NOx

Emission Limit NOx and CO (Austria)

Emission Limit NOx (LCP-directive)at load >70%

min Load

EU-LCP regulation Austrian Regulationload>70%

NOx (mg/Nm3) 50 35CO (mg/Nm3) - 35

NOx and CO-emission limits

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The 800 MW CCGT project „Mellach“

View at the new CCGT plant Mellach

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The 800 MW CCGT project „Mellach“

CCGT power plantTAG – Trans Austria Gas pipeline

Connection to the high voltage grid

cooling water system

district heating system

Plant layout

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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“

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  2003 2004 2005 2006 2007 2008 2009

                             

preliminary works                            

environmental impact analysis                            

tendering and order of plant                            

design, manufacture, erection                            

commissioning                            

commercial operation                            

                             

The 800 MW CCGT project „Mellach“

Project timetable

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The 800 MW CCGT project „Mellach“