Part load behaviour of power plants with a retrofitted post-combustion CO₂ capture process

Publikationstyp
Conference Paper
Date Issued
2013-08-28
Sprache
English
Author(s)
Roeder, Volker  
Kather, Alfons  
Institut
Energietechnik M-5  
TORE-DOI
10.15480/882.2218
TORE-URI
http://hdl.handle.net/11420/2389
Journal
Energy procedia  
Start Page
207
End Page
216
Citation
Energy Procedia (51): 207-216 (2013)
Publisher DOI
10.1016/j.egypro.2014.07.024
Scopus ID
2-s2.0-84906960588
Publisher
Elsevier
The flexible and part load operation of fossil-fuelled power plants will increase due to the higher share of fluctuating renewable energies, like wind and solar power. In this work the part load behaviour of the post-combustion CO₂ capture (PCC) process is evaluated. The net efficiency of the conventional hard-coal-fired power plant decreases from 45.6% at full load to 41.5% at 40% load. The net efficiency with PCC using 7 m MEA (monoethanolamine) as solvent decreases to 34.8% at full load and to 30.1% at 40% load. The pressure of the intermediate pressure/low pressure crossover section has major influence on the efficiency. In part load higher pressures are in advantage due to lower throttling losses. The shutdown of the PCC is a possibility to generate balancing power. A reduced capture rate of 75% leads to a generation of 5% additional power.
Subjects
post-combustion capture
part load behaviour
IP/LP crossover pressure
balancing power
DDC Class
600: Technik
620: Ingenieurwissenschaften
Lizenz
https://creativecommons.org/licenses/by-nc/3.0/
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