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Modern Combined Cycle Power Plants – Improvement of a high efficient and clean technology O. Kreyenberg, H. Schütz, H. Friede Siemens PG. "Energy Efficiency in IPPC-installations" 21 and 22 October 2004 Vienna. Agenda. Market Drivers. Reference Power Plant Product Overview

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energy efficiency in ippc installations 21 and 22 october 2004 vienna

Modern Combined Cycle Power Plants – Improvement of a high efficient and clean technologyO. Kreyenberg, H. Schütz, H. Friede Siemens PG

"Energy Efficiency in IPPC-installations"

21 and 22 October 2004

Vienna

agenda
Agenda

Market Drivers

Reference Power Plant Product Overview

- Steam Power Plant

- Combined Cycle Power Plant

Reference Power Plant Design Philosophy

Design Targets

References

the market conditions have changed dramatically in the power industry over the last 10 years

Efficiency

Risk Guarantee*

Overall Construction Time

Price

The Market Conditions Have Changed Dramatically in the Power IndustryOver the Last 10 Years

Market Conditions

Years

* technical warranties (NOx, et. al.), delivery time

life cycle cost lcc analysis
Life Cycle Cost (LCC) Analysis

Parameters influenced

by the supplier

Parameters

Costs

Investment costs

Financing costs

Service life

Demolition costs

Reduction of specificinvestment costs

Global sourcing

Modular design

Short delivery times

Capital

costs

Live

Cycle

Costs

Fuel contractconditions

Efficiency

Fuel

Costs

High process and

component efficiencies

Personnel costs

Consumables/waste

Spare parts

Maintenance

Optimized level ofautomation

High availability

Ease of maintenance

Operating

costs

our reference power plants are focused on international main market demand for ipp s

Varioplant 300 300- 450 MW 700 500- 750 MW 900 800- 1000 MW

Gas/Oil

Single-Shaft 50 Hz 100, 290, 400 MW

Multi-Shaft 50 Hz 200, 580, 800 MW60 Hz 200, 540, 730 MW

60 Hz 100, 270, 365 MW

Our Reference Power Plants are Focused on International Main Market Demand for IPP’s

Coal/Oil

Customized...

of the shelf...

Components, Islands and Turnkey

Gas/Oil

multi shaft combined cycle power plant econopac arrangement
Multi-Shaft Combined Cycle Power Plant Econopac Arrangement
  • ECONOPAC
  • Gas turbine
  • Gas turbine generator
  • Air intake
  • Exhaust gas system
  • Fuel system
  • Electrical package (SFC/SEE)
  • GT - Auxiliaries
  • Fire protection
  • Options
multi shaft combined cycle power plant power island arrangement
Multi-Shaft Combined Cycle Power Plant Power Island Arrangement
  • POWER ISLAND
  • Econopac
  • Steam turbine
  • Steam turbinegenerator incl. SEE
  • Heat recoverysteam generator
  • Major pumps
  • Condenser
  • Critical valves
  • ST - Auxiliaries
  • Cycle optimization
  • Fuel gas pre-heater
  • Options
multi shaft combined cycle power plant turnkey cooling tower
Multi-Shaft Combined Cycle Power Plant Turnkey (Cooling Tower)
  • TURNKEY
  • Power Island
  • Fuel supply systems
  • Cooling systems
  • Water treatment
  • Raw water system
  • Waste water system
  • Tanks
  • Cranes/hoists
  • Buildings/structures
  • Fire protection
  • Plant piping/valves
  • Plant electrical
  • Further options
multi shaft combined cycle power plant turnkey with house cooling tower
Multi-Shaft Combined Cycle Power Plant Turnkey with House (Cooling Tower)
  • TURNKEY
  • Power Island
  • Fuel supply systems
  • Cooling systems
  • Water treatment
  • Raw water system
  • Waste water system
  • Tanks
  • Cranes/hoists
  • Buildings/structures
  • Fire protection
  • Plant piping/valves
  • Plant electrical
  • Further options
evolution of combined cycle power plant efficiency
Evolution of Combined Cycle Power Plant Efficiency

Steam cycle

Single pressure

Dual pressure

Tripple pressure with reheat

Net efficiency(%)

60

Turbine inlettemp. (ISO)

Fuel preheating

Life steampressure

Life steamtemperature

1160°C

100 bar

520°C

1250°C

200°C

160 bar

580°C

58

1230°C

130°C

125 bar

565°C

1230°C

130°C

110 bar

550°C

1120°C

80 bar

520°C

1190°C

200°C

110 bar

540°C

56

1050°C

75 bar

510°C

54

1000°C

60 bar

485°C

52

960°C

50 bar

460°C

Fuel gas firing

ISO ambient conditions

(15°C, 1013 mbar, 60% rel. humidity)

Condenser back pressure 0.04 bar

50

48

46

1983/84

1987/88

1990/91

1992/93

1994/95

1996/97

1998/99

2001

2005/06

Year of commissioning

Source: Siemens Gas Turbines

power output efficiency nox emission and cooling air demand versus combustion temperature

.

mKL

Power Output, Efficiency, NOx-Emission and Cooling Air Demand versus Combustion Temperature

Boundary conditions:

The same technology for blade cooling, combustion chamber cooling and burner.

Ex-

haust

gas

102%

Gas turbine

NOX

Tcomb.

Fuel

2%

Heat recovery

steam generator

Combustion

chamber

Combustion

air 80%

NOX

Air intake

100%

Electricity

Generator

Cooling air 20%

TCool.-air

hGUD

Steam turbine

Circulating

water

Electricity

TIT

Generator

Condenser

1570°C

1700°C

TCombustion

efficiency improvements due to increasing the number of pressure stages
Efficiency Improvements due to Increasing the Number of Pressure Stages

Temperature curves in aheat recovery steam generator

Efficiency increase

D h net

[%-points]

Temperature [°C]

1-pressure process

2-pressure process

3-pressure process

125 bar/565 °C28 bar/565 °C4 bar/235 °C

3

600

125 bar/565 °C29 bar/320 °C5 bar/200 °C

500

Exhaust gas

400

2

80 bar/540 °C5 bar/210 °C

300

2.8

2.1

1

200

1.6

100

65 bar/540 °C

54.1%

0

0

Transfered heat

1-pressure

2-pressure

3-pressurewithoutreheat

3-pressure

withreheat

quick start up increases plant utilisation factor
Quick Start up Increases Plant Utilisation Factor...

GT at full load/Bypass System closed

Start-up after 8h Shut-down

Plant start-up with

improved equipment

Typical plant start-up

Plant Load [MW]

≈ 40 min

≈ 90 min

Time

relationship between turbine inlet temperature and nox emissions
Relationship between turbine inlet temperature and NOx emissions

A temperature increase by 70K doubles the NOx- emissions !

one the way to the technical leadership
One the way to the Technical leadership

nowtomorrow

Efficiency 58%* > 59%

TIT** 1230°C 1290°C

NOx 25 ppm 9 – 15 ppm

* depending on cooling conditions

** turbine inlet temperature

Details on additional measures will be presented at a VDI Symposium in Leverkusen

23./24. November 2004

mainz wiesbaden germany combined cycle power plant v94 3a with steam extraction
Mainz-Wiesbaden, Germany Combined Cycle Power Plant V94.3Awith Steam Extraction

Mainz - Wiesbaden (Germany)

Concept: Multi Shaft 1+1 V94.3A

Output (nat. gas, site) : 1 x 400 MW

Efficiency (nat. gas, site): >58,4 %*

COD: July 2001

Fuels: Natural Gas (Fuel oil Back up)

Contract: EPC TK plus 10 y. S&M

pulau seraya singapore 2 cc 1s v94 3a the most efficient plant in sea
Pulau Seraya, Singapore: 2 CC 1S.V94.3AThe Most Efficient Plant in SEA

Pulau Seraya (Singapore)

Concept: Single Shaft 1S.V94.3A

Output (nat. gas, site) : 2x 367 MW

Efficiency (nat. gas, site): >57.2 %

COD: November 2002

Fuels: Natural Gas (Fuel oil Back up)

Contract: EPC TK plus 10 y. S&M