An adaptive vapor recompression scheme for a ternary batch distillation with a side withdrawal / G. Uday Bhaskar Babu in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4990–4997 Titre : An adaptive vapor recompression scheme for a ternary batch distillation with a side withdrawal Type de document : texte imprimé Auteurs : G. Uday Bhaskar Babu, Auteur ; Etendra K. Pal, Auteur ; Amiya K. Jana, Auteur Année de publication : 2012 Article en page(s) : pp. 4990–4997 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Batch distillation Adaptive vapor Résumé : Batch distillation is known to be less energy efficient than its continuous counterpart. However, it has received renewed interest last years owing to the flexibility it offers. In an effort to reduce energy consumption, a batch distillation with a side withdrawal (BDS) was proposed recently. In this contribution, we first construct the fundamental model for an unsteady state BDS process and simulate the column to derive an operational policy. Although the representative process was proved as an energy efficient scheme, in order to improve further the thermodynamic efficiency of the BDS structure, we propose an adaptive vapor recompression mechanism that considers the top vapor recompression with a variable speed. Apart from the compression ratio (CR), the other two manipulated variables involved are the external heat input to the reboiler through steam and the flow rate of overhead vapor entering the compressor. It is investigated that the two manipulated variables are required to adapt simultaneously throughout the batch operation; one is the CR and another one is either the heat input to the still or the overhead vapor rate. Finally, the influence of the adaptive vapor recompression scheme on the energetic and economic aspects is evaluated through intensive comparison against the conventional stand alone column. The proposed adaptive vapor recompression strategy appears overwhelmingly superior to its conventional counterpart in terms of thermal efficiency and economic performance. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201413p [article] An adaptive vapor recompression scheme for a ternary batch distillation with a side withdrawal [texte imprimé] / G. Uday Bhaskar Babu, Auteur ; Etendra K. Pal, Auteur ; Amiya K. Jana, Auteur . - 2012 . - pp. 4990–4997. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4990–4997 Mots-clés : Batch distillation Adaptive vapor Résumé : Batch distillation is known to be less energy efficient than its continuous counterpart. However, it has received renewed interest last years owing to the flexibility it offers. In an effort to reduce energy consumption, a batch distillation with a side withdrawal (BDS) was proposed recently. In this contribution, we first construct the fundamental model for an unsteady state BDS process and simulate the column to derive an operational policy. Although the representative process was proved as an energy efficient scheme, in order to improve further the thermodynamic efficiency of the BDS structure, we propose an adaptive vapor recompression mechanism that considers the top vapor recompression with a variable speed. Apart from the compression ratio (CR), the other two manipulated variables involved are the external heat input to the reboiler through steam and the flow rate of overhead vapor entering the compressor. It is investigated that the two manipulated variables are required to adapt simultaneously throughout the batch operation; one is the CR and another one is either the heat input to the still or the overhead vapor rate. Finally, the influence of the adaptive vapor recompression scheme on the energetic and economic aspects is evaluated through intensive comparison against the conventional stand alone column. The proposed adaptive vapor recompression strategy appears overwhelmingly superior to its conventional counterpart in terms of thermal efficiency and economic performance. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201413p

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