Conceptual gas turbine modelingfor oxy-fuel power cycles

Egill Maron ThorbergssonDivision of fluid mechanics

Department of applied mechanics Chalmers

Overivew

─ Carbon capture and storage─ The project─ Gas turbine and combined cycle─ Semi-closed oxy-combustion combined cycle

Carbon capture and storage

1/3 of anthropogenic CO2 emissions is from power

generation sector

Carbon capture and storage

Three competing solutions─ Post combustion ─ Pre combustion─ Oxy-fuel combustion

1/3 of anthropogenic CO2 emissions is from power

generation sector

Carbon capture and storage

Three competing solutions─ Post combustion ─ Pre combustion─ Oxy-fuel combustion

1/3 of anthropogenic CO2 emissions is from power

generation sector

The project

─ Develop design tools to design turbomachinery components in oxy-fuel cycles

─ Joint project between Chalmers University and Lund University• Chalmers focuses on compressor design• Lund focuses on turbine design

─ Design components for two cycles• Graz cycle • Semi-closed oxy-combustion combined cycle (SCOC)

The project

─ Develop design tools to design turbomachinery components in oxy-fuel cycles

─ Joint project between Chalmers University and Lund University• Chalmers focuses on compressor design• Lund focuses on turbine design

─ Design components for two cycles • Graz cycle • Semi-closed oxy-combustion combined cycle (SCOC)

The project

─ Develop design tools to design turbomachinery components in oxy-fuel cycles

─ Joint project between Chalmers University and Lund University• Chalmers focuses on compressor design• Lund focuses on turbine design

─ Design components for two cycles• Graz cycle • Semi-closed oxy-combustion combined cycle (SCOC)

The project

─ Develop design tools to design turbomachinery components in oxy-fuel cycles

─ Joint project between Chalmers University and Lund University• Chalmers focuses on compressor design• Lund focuses on turbine design

─ Design components for two cycles• Graz cycle • Semi-closed oxy-combustion combined cycle (SCOC)

Gas turbine

Gas turbine from Siemens (198 MW)

Gas turbine combined cycle

Gas turbine combined cycle

Current efficiencies up to 60%

Semi-closed oxy-combustion combined cycle

Semi-closed oxy-combustion combined cycle

Not air but CO2

Different working fluid in GT

Semi-closed oxy-combustion combined cycle

Efficiency around 49%

Why is there need to have a new design?

GT Compressor

(air)

SCOCCompressor

AR 1 %(kg/kg)

4.1 %(kg/kg)

O2 23 % ~0.1%CO2 ~0 % 94.7 %H2O 0 % 1 %N2 76 % 0.1 %

Isentropic exp 1.4 1.3Gas constant

[kJ/(kg K)] 0.287 0.20

Why is there need to have a new design?

GT Compressor

(air)

SCOCCompressor

AR 1 %(kg/kg)

4.1 %(kg/kg)

O2 23 % ~0.1%CO2 ~0 % 94.7 %H2O 0 % 1 %N2 76 % 0.1 %

Isentropic exp 1.4 1.3Gas constant

[kJ/(kg K)] 0.287 0.20

Why is there need to have a new design?

GT Compressor

(air)

SCOCCompressor

AR 1 %(kg/kg)

4.1 %(kg/kg)

O2 23 % ~0.1%CO2 ~0 % 94.7 %H2O 0 % 1 %N2 76 % 0.1 %

Isentropic exp 1.4 1.3Gas constant

[kJ/(kg K)] 0.287 0.20

SCOC - Compressor

18 stages to get a pressure ratio of 40

─ Meanline design tool to design compressors

Conceptual gas turbine modeling for oxy-fuel power cycles

• Develop design tools to design turbomachinery components in oxy-fuel cycles

• Design the components for the Graz cycle and the Semi-closed oxy-combustion combined cycle

Questions?

Comments or further questions:egill@chalmers.se

Slide Number 1OverivewCarbon capture and storageCarbon capture and storageCarbon capture and storageThe projectThe projectThe projectThe projectGas turbineGas turbine combined cycleGas turbine combined cycleSemi-closed oxy-combustion combined cycleSemi-closed oxy-combustion combined cycleSemi-closed oxy-combustion combined cycleWhy is there need to have a new design?Why is there need to have a new design?Why is there need to have a new design?SCOC - CompressorConceptual gas turbine modeling for oxy-fuel power cycles