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dc.contributor.authorGardarsdóttir, Stefanía Ósk
dc.contributor.authorMocholí Montañés, Rubén
dc.contributor.authorNormann, Fredrik
dc.contributor.authorNord, Lars O.
dc.contributor.authorJohnsson, Filip
dc.date.accessioned2017-11-09T09:27:07Z
dc.date.available2017-11-09T09:27:07Z
dc.date.created2017-04-21T14:58:28Z
dc.date.issued2017
dc.identifier.citationIndustrial & Engineering Chemistry Research. 2017, 56 (15), 4415-4430.nb_NO
dc.identifier.issn0888-5885
dc.identifier.urihttp://hdl.handle.net/11250/2465127
dc.description.abstractThis work investigates the interactions that occur between a supercritical pulverized-coal-fired power plant and a downstream CO2-absorption process during load changes in the power plant by linking the dynamic models of the two systems. The derived dynamic model for this integrated system is implemented in the dynamic modeling and simulation software Dymola. The operation of the integrated system is investigated in two modes of operation, considering various power plant loads and levels of steam availability for the CO2-absorption process. Several schemes for control of the CO2-absorption process, which have been suggested in the literature, are implemented for the integrated system, and their effects on power plant operation are evaluated. Comparison of the simulation results obtained through varying the power plant load with and without CO2 absorption reveal that the CO2-absorption process has slower process dynamics than the power plant cycle, with the CO2 absorption stabilizing in more than 1 h, while the power generation generally stabilizes in 6–9 min in the power plant both with and without CO2 absorption. The control scheme used for the CO2-absorption process is important, because pairing of the control variables in relatively slow control loops increases the settling time of the power plant by up to 30 min with respect to power output. The results suggest that the investigated CO2-absorption process does not affect significantly the load-following capabilities of the power plant. Redirecting steam from the CO2-absorption process to the low-pressure turbine section in order to increase power generation (during a hypothetical peak-load demand) results in fluctuations of process variables in the power plant during the 2 h of reduced steam availability to the CO2-absorption process. This is observed for both control schemes applied to the CO2-absorption process, and the power generation is not stabilized until the operation is restored to full load.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Chemical Societynb_NO
dc.titleEffects of CO2-Absorption Control Strategies on the Dynamic Performance of a Supercritical Pulverized-Coal-Fired Power Plantnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber4415-4430nb_NO
dc.source.volume56nb_NO
dc.source.journalIndustrial & Engineering Chemistry Researchnb_NO
dc.source.issue15nb_NO
dc.identifier.doi10.1021/acs.iecr.6b04928
dc.identifier.cristin1465981
dc.description.localcodeThis is the authors' accepted and refereed manuscript to the article. Locked until 28 March 2018 due to copyright restrictions.nb_NO
cristin.unitcode194,64,25,0
cristin.unitnameInstitutt for energi- og prosessteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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