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dc.contributor.authorWahl, Per Eilif
dc.contributor.authorLøvseth, Sigurd Weidemann
dc.date.accessioned2018-05-30T07:55:32Z
dc.date.available2018-05-30T07:55:32Z
dc.date.created2015-07-07T14:18:47Z
dc.date.issued2015
dc.identifier.citationComputers and Chemical Engineering. 2015, 82 1-12.nb_NO
dc.identifier.issn0098-1354
dc.identifier.urihttp://hdl.handle.net/11250/2499717
dc.description.abstractSequential quadratic programming (SQP) may be very efficient compared with other techniques for the optimization of simple processes for the liquefaction of natural gas (LNG), and can be combined with process evaluation using commercial flowsheet simulators. However, the level of success is dependent on the formulation of the problem. In this work, effects of varying different aspects of the optimization problem formulation is investigated, such as variable selection, formulae for the estimation of derivatives, initial values, variable bounds, and formulation of constraints. Especially the formulation of the constraint for the temperature difference between the hot and cold composite curve is essential. The commonly used minimum temperature difference constraint should generally not be employed in gradient based optimization. Recommendations regarding optimization of simple LNG processes using SQP and flowsheet simulators are provided.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.titleFormulating the optimization problem when using sequential quadratic programming applied to a simple LNG processnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holderAuthors have copyright to accepted versionnb_NO
dc.source.pagenumber1-12nb_NO
dc.source.volume82nb_NO
dc.source.journalComputers and Chemical Engineeringnb_NO
dc.identifier.doi10.1016/j.compchemeng.2015.06.003
dc.identifier.cristin1252833
dc.relation.projectNorges forskningsråd: 193062nb_NO
cristin.unitcode7548,60,0,0
cristin.unitnameGassteknologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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