hierarchical structured exergetic analysis of an igcc...
TRANSCRIPT
Technische Universität München
Hierarchical Structured Exergetic Analysis of an IGCC Concept with Carbon Capture
Christian Kunze1, Dr. Karsten Riedl2, Prof. Hartmut Spliethoff1
1 TU München, Institute for Energy SystemsBoltzmannstr. 15, 85748 Garching b. München, Germany2 E.ON Engineering GmbHAlexander-von-Humboldt-Str. 1, D-45896 Gelsenkirchen, Germany
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Agenda
Research Project - HotVeGas
Boundary Conditions
Exergetic Analysis
Conclusion
Outlook
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Research Project -
Finance 80% BMWi 20% Industry
Coordinator
Research
Institute for Energy Systems (ES)
IEC IEF ES
E.ONRWEEnBWVattenfallSiemens Fuel GasificationGTT
CFD SimulationsProcess Evaluations Trace SpeciesCondensation
GasificationKinetics
Aims:
• Loss Analysis • Potential• Research Requirements
p: up to 50 barT: 500 – 1200°C
p: up to 50 barT: up to 1800°C
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Boundary Conditions - IGCC Plant Model
• Concept for IGCC with 90% carbon capture (hard coal, available in 2020)• Software:
– ASPEN PLUS (Gasifier Island / Gas Treatment) – EBSILON Professional (Combined Cycle)
• Model verified by supplier data and literature
ASU
WashGasifier CO ShiftScrubber Saturator
Claus CO2Compr.
Coal preparation
N2Compr.
O2 Compr.
GT
ST
HRSG
Technische Universität München
Exergetic Analysis – Overview
• Exergy: - Quality of energy- Defined reference state: moisture air, liquid water and solid sulphur
• Balance:
• Analysis: Where are the losses?
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Exergetic Analysis – Structure
IGCC Plant Level
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Gas Island Gas Treatment Combined Cycle
Subsystem LevelComponent Level
ASU
WashGasifier CO ShiftScrubber Saturator
Claus CO2Compr.
Coal preparation
N2Compr.
O2 Compr.
GT
ST
HRSG
Technische Universität München
Exergetic Analysis: Overall Plant Level
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Loss ranking: Combined Cycle > Gas Treating > Gas Island
Technische Universität München
Exergetic Analysis: Subsystems of Overall Plant
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Exergetic Analysis: Gas Island
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Quench - gasifier causes 75% of losses in the subsystem
Technische Universität München
Exergetic Analysis: GasTreatment
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
AGR - causes 57% of losses in the subsystem
Technische Universität München
Exergetic Analysis: Component Level of Gas Treatment
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Exergetic Analysis: Combined Cycle
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Gas turbine by far highest loss contribution: 85%
Technische Universität München
Conclusion
• Approach applicable to investigate process losses
• IGCC (CCS): loss coefficient of 60%
• Main losses: gas turbine, AGR, gasifier
• Gas treatment causes significantly losses: loss coeficient 17.4%
• Optimisation mostly by increased process integration complexity
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
new gas clean up concepts
80%
90%
Technische Universität München
Outlook – Hot Gas Clean-up System (HGCU)
• removal of liquid slag and traces
• membrane enhanced shift conversion and H2 separation
• efficient recovery of CO2 and production of pure hydrogen
HGCU – Concept:
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
• Efficiency estimation:
4.5 %-points thermodynamic efficiency potential
• Exergetic Analysis:
−
Loss reduction 5.1 %-pt.−
Shift in benefit−
Improved gasifier and CC efficiency
Outlook – Hot Gas Clean-up System (HGCU)
IFC 2010, 3 – 5 May, 2010, Dresden, Germany
Technische Universität München
Thank you very much for your attention!
Contact: Christian KunzeTU München Institute for Energy SystemsEmail: [email protected]
This work is part of a project supported by Bundesministerium für Wirtschaft und Technologie and industrial partner under contract number 0327773A. The authors would like to thank the project partners for their valuable input and discussions.
IFC 2010, 3 – 5 May, 2010, Dresden, Germany