Modeling and simulation of the start-up process of coal fired power plants with post-combustion CO₂ capture

A detailed model of a post-combustion CO₂ capture plant (pcc-plant) is developed in the Modelica ® language which allows the simulation of start-up and shutdown processes. The model of the pcc-plant is coupled to a simplified model of a coal fired power plant to investigate the coupled process. To guarantee a stable and automatic operation, a sequential control for start-up and shutdown procedures is implemented in both plants. Two case studies, focussing on the pcc-plant, are subsequently performed in this contribution. In the first case study, the influence of different parameters and input variables on the start-up time is investigated in order to analyze the start-up process of the pcc-plant. The varied variables are the steam flow rate to the reboiler, the solvent flow rate and the total amount of solvent in the pcc-plant. In the second case study two different start-up control structures for the carbon capture plant are proposed and their performances are presented and compared.

Subjects

Post-combustion capture

CCS

Start-up

Modeling

Coal-fired power plant

Dynamic simulation

DDC Class

620: Ingenieurwissenschaften

Funding(s)

DYNSTART - Anfahren und transientes Verhalten von Kraftwerken, Untersuchung von Dampfkraftprozessen und kombinierten Gas- und Dampfprozessen mit CO²-Abtrennung unter den Randbedingungen einer hohen fluktuierenden regenerativen Einspeisung

More Funding Information

German Federal Ministry for Economic Affairs and Energy (project number 03ET7060B)

Lizenz

https://creativecommons.org/licenses/by/4.0/

Name

1-s2.0-S1750583618307357-main.pdf

Size

2.43 MB

Format

Adobe PDF

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Modeling and simulation of the start-up process of coal fired power plants with post-combustion CO₂ capture