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dc.contributor.authorKingston, Diego
dc.contributor.authorWilhelmsen, Øivind
dc.contributor.authorKjelstrup, Signe
dc.date.accessioned2020-02-28T13:06:23Z
dc.date.available2020-02-28T13:06:23Z
dc.date.created2020-02-03T10:07:01Z
dc.date.issued2020
dc.identifier.issn0009-2509
dc.identifier.urihttp://hdl.handle.net/11250/2644409
dc.description.abstractIn this work, we apply the rate-based model of Taylor and Krishna to describe the separation of air in a low-pressure, packed distillation column. By use of numerical optimization, we identify the temperature profile for heat exchange with the column and its surroundings that minimizes the total entropy production. Optimal operation of the column reduces the entropy production by nearly 50%, and the total heating- and cooling duties by 30% and 50%, respectively. We find that the local entropy production is more uniform for the optimal solution than in the adiabatic column, a property that may be helpful for new designs. Using the equilibrium stage model, the state of minimum entropy production has higher cooling/heating duties than in the rate-based model case. This shows that more sophisticated models can be beneficial for the development of reliable strategies to improve the energy efficiency of distillation columns.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleMinimum entropy production in a distillation column for air separation described by a continuous non-equilibrium modelnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.journalChemical Engineering Sciencenb_NO
dc.identifier.doi10.1016/j.ces.2020.115539
dc.identifier.cristin1790053
dc.relation.projectNorges forskningsråd: 257632nb_NO
dc.relation.projectNorges forskningsråd: 262644nb_NO
dc.description.localcode© 2020. This is the authors’ accepted and refereed manuscript to the article. Locked until 6.2.2022 due to copyright restrictions. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO
cristin.unitcode194,66,25,0
cristin.unitcode194,64,25,0
cristin.unitnameInstitutt for kjemi
cristin.unitnameInstitutt for energi- og prosessteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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