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

Publikationstyp
Conference Paper
Date Issued
2013-06
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
First published in
Energy procedia  
Number in series
51
Start Page
207
End Page
216
Citation
7th Trondheim CCS Conference, TCCS 2013
Contribution to Conference
7th Trondheim CCS Conference, TCCS 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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