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Plantwide control for throughput maximization / Rahul Kanodia in Industrial & engineering chemistry research, Vol. 49 N° 1 (Janvier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 210–221 Titre : Plantwide control for throughput maximization : a case study Type de document : texte imprimé Auteurs : Rahul Kanodia, Auteur ; Nitin Kaistha, Auteur Année de publication : 2010 Article en page(s) : pp. 210–221 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Plantwide  Control--Throughput--Maximization--Case  Study Résumé : The impact of the basic plantwide regulatory control structure on maximizing the throughput using an explicit optimizing controller is quantitatively evaluated for a simple process module. The module consists of the reaction A + B → C occurring in a continuously stirred tank reactor followed by a distillation column separating the product from the recycled unreacted reactants. The column vapor boilup hitting a maximum acts as the bottleneck constraint limiting the throughput due to column flooding. Through an evaluation of reasonable plantwide control structures, the location of the throughput manipulator, the composition analyzer for overall component inventory balancing and the “local” column reflux management policy are shown to significantly affect the maximum throughput. Quantitative results show that locating the throughput manipulator close to and where possible at the bottleneck constraint reduces the throughput derating necessary due to disturbances. Designing the plantwide regulatory control system to minimize the process variability propagated into the bottleneck constraint emerges as the key heuristic from the case study. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900366r [article] Plantwide control for throughput maximization : a case study [texte imprimé] / Rahul Kanodia, Auteur ; Nitin Kaistha, Auteur . - 2010 . - pp. 210–221. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 1 (Janvier 2010) . - pp. 210–221 Mots-clés : Plantwide  Control--Throughput--Maximization--Case  Study Résumé : The impact of the basic plantwide regulatory control structure on maximizing the throughput using an explicit optimizing controller is quantitatively evaluated for a simple process module. The module consists of the reaction A + B → C occurring in a continuously stirred tank reactor followed by a distillation column separating the product from the recycled unreacted reactants. The column vapor boilup hitting a maximum acts as the bottleneck constraint limiting the throughput due to column flooding. Through an evaluation of reasonable plantwide control structures, the location of the throughput manipulator, the composition analyzer for overall component inventory balancing and the “local” column reflux management policy are shown to significantly affect the maximum throughput. Quantitative results show that locating the throughput manipulator close to and where possible at the bottleneck constraint reduces the throughput derating necessary due to disturbances. Designing the plantwide regulatory control system to minimize the process variability propagated into the bottleneck constraint emerges as the key heuristic from the case study. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900366r