A note on the controllability of two short-cut designs for a class of thermally coupled distillation sequence / Miguel Vaca in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2283–2289 Titre : A note on the controllability of two short-cut designs for a class of thermally coupled distillation sequence Type de document : texte imprimé Auteurs : Miguel Vaca, Auteur ; Arturo Jimenez-Gutierrez, Auteur ; José Alvarez-Ramírez, Auteur Année de publication : 2009 Article en page(s) : p. 2283–2289 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ternary mixtures Thermally coupled sequence Open-loop transfer function Résumé : The separation of multicomponent mixtures with conventional distillation sequences is energy-intensive. The use of thermal coupling sequences provides a more-efficient alternative, although their industrial usage has been quite limited, because of the complexity of design methods and potential difficulties during operation. In this work, we study a direct thermally coupled sequence for the separation of ideal ternary mixtures and perform a comparative study of two different designs, one based on the tray structure of an equivalent conventional sequence and the other specifically considering the effect of the thermal coupling on tray distribution and operational flows. Using the singular value decomposition technique on open-loop transfer function matrixes, controllability indexes were obtained. The controllability indexes of both designs are of the same order of magnitude, which means that their dynamic responses are basically the same. Although additional studies of dynamic simulation under closed-loop conditions are necessary, our results indicate that the controllability properties are similar, and that the design that provides the smallest energy consumption should be favored. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800993u [article] A note on the controllability of two short-cut designs for a class of thermally coupled distillation sequence [texte imprimé] / Miguel Vaca, Auteur ; Arturo Jimenez-Gutierrez, Auteur ; José Alvarez-Ramírez, Auteur . - 2009 . - p. 2283–2289. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2283–2289 Mots-clés : Ternary mixtures Thermally coupled sequence Open-loop transfer function Résumé : The separation of multicomponent mixtures with conventional distillation sequences is energy-intensive. The use of thermal coupling sequences provides a more-efficient alternative, although their industrial usage has been quite limited, because of the complexity of design methods and potential difficulties during operation. In this work, we study a direct thermally coupled sequence for the separation of ideal ternary mixtures and perform a comparative study of two different designs, one based on the tray structure of an equivalent conventional sequence and the other specifically considering the effect of the thermal coupling on tray distribution and operational flows. Using the singular value decomposition technique on open-loop transfer function matrixes, controllability indexes were obtained. The controllability indexes of both designs are of the same order of magnitude, which means that their dynamic responses are basically the same. Although additional studies of dynamic simulation under closed-loop conditions are necessary, our results indicate that the controllability properties are similar, and that the design that provides the smallest energy consumption should be favored. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800993u

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