dynamic modelling and simulation of supercritical …
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AKEEM KEHINDE OLALEYEPhD Research StudentSchool of Engineering
Supervisor: Dr. Meihong Wang
DYNAMIC MODELLING AND SIMULATION OF SUPERCRITICAL COAL-FIRED POWER
PLANT WITH CO2 CAPTURE
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CONTENTS1
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PROJECT BACKGROUNDCoal-fired power plant??? 2
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PROJECT BACKGROUND
CO2 Emission reduction from
Coal-fired Power Plants
Coal-fired power plant – Emission Abatement Strategy 3
Approaches:
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PROJECT BACKGROUNDSupercritical ???
Critical point of water-steam: 22.115 MPa, 374.150C
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Water Phase Diagram
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PROJECT BACKGROUNDMOTIVATION
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Supercritical?•Challenge of climate change
•Need for higher generating capacity
•Need for improvement in efficiency
•Decommissioning of existing power plants based on available lifetime
•UK Grid Code Issues
Supercritical?•Challenge of climate change
•Need for higher generating capacity
•Need for improvement in efficiency
•Decommissioning of existing power plants based on available lifetime
•UK Grid Code Issues
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• CO2 Separation
• Physical Absorption• Cryogenic separation• Membrane Separation• Chemical Absorption
• Chemical Absorption• Matured technology• High selectivity• readily available solvent
(MEA)
PROJECT BACKGROUNDPost Combustion CO2 Capture (PCC)
Typical PCC by Chemical Absorption Plant (SINTEF, 2012)
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PROJECT BACKGROUNDUK GRID CODE REQUIREMENT
The Primary Response capability (P) of a Generating Unit or a CCGT Module or Power Park Module or DC Converter is the minimum increase in Active Power output between 10 and 30 seconds after the start of the ramp injection.
The Secondary Response capability (S) is the minimum increase in Active Power output between 30 seconds and 30 minutes after the start of the ramp injection.
The High Frequency Response capability (H) of a Generating Unit or a CCGT Module or Power Park Module or DC Converter is the decrease in Active Power output provided 10 seconds after the start of the ramp injection and sustained thereafter.
Interpretation of primary and secondary response values Interpretation of primary and secondary response values
Interpretation of high frequency response valuesInterpretation of high frequency response values
System frequency
�Generation < Demand: Frequency falls
�Generation > Demand: Frequency rise
�Grid Code Frequency Range: 50±0.5Hz
System frequency
�Generation < Demand: Frequency falls
�Generation > Demand: Frequency rise
�Grid Code Frequency Range: 50±0.5Hz
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Typical Primary and Secondary frequency responseTypical Primary and Secondary frequency response
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AIMS AND OBJECTIVES
To Develop a Dynamic model for a Supercritical Coal-fired (SCPC) Power Plant and to explore whether such a Supercritical Plant with CO2 post combustion capture ability can satisfy the UK grid requirements
To Develop a Dynamic model for a Supercritical Coal-fired (SCPC) Power Plant and to explore whether such a Supercritical Plant with CO2 post combustion capture ability can satisfy the UK grid requirements
AIM
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AIMS AND OBJECTIVES
OBJECTIVES
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RESEARCH METHODOLOGY
MODEL-BASED STUDIES OF SCPC POWER PLANT WITH CO2
CAPTURE
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RESEARCH METHODOLOGY 11
• Steady state simulation and validation of supercritical coal-fired power plant in Aspen Plus®
• Dynamic modelling, and validation using gPROMS®. gPROMS® modelling tool was selected due to:
• Equation-oriented tool• Parameter estimation/model fine tuning• Solvers capable of solving any order of ODE/PDE• Fluid property packages• Modelling of operating procedure• Analysis of dynamic model to satisfy UK grid code
• Steady state simulation and validation of supercritical coal-fired power plant in Aspen Plus®
• Dynamic modelling, and validation using gPROMS®. gPROMS® modelling tool was selected due to:
• Equation-oriented tool• Parameter estimation/model fine tuning• Solvers capable of solving any order of ODE/PDE• Fluid property packages• Modelling of operating procedure• Analysis of dynamic model to satisfy UK grid code
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QUESTIONS ???? 12