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Design methodology for screening dynamic characteristics of candidate heat - integrated flowsheets / Robert J. Brende in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9877–9886 Titre : Design methodology for screening dynamic characteristics of candidate heat - integrated flowsheets Type de document : texte imprimé Auteurs : Robert J. Brende, Auteur ; Prasad S. Dhurjati, Auteur Année de publication : 2011 Article en page(s) : pp. 9877–9886 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Heat  integrated  Dynamic Résumé : Well-established design methods exist for generating candidate heat-exchanger networks (HENs), but there is a strong need for a methodology to screen for undesirable dynamic characteristics that are often observed in heat-integrated processes. In this paper, a simple transfer function-based method is developed that can assist in comparing dynamic behavior of candidate heat-integrated flowsheets. Use of the method allows the design engineer to determine the dynamic characteristics of the overall process shortly after identifying exchanger networks that satisfy the process heat balance. Mathematical development of the method is given, followed by explanations of its use. The basis of the method is developed in block-diagram format, making apparent the source of positive feedback that can result from adding heat integration to a process. Finally, the method is demonstrated on three candidate HENs for a simple process. The method allows for identification of dynamic characteristics that would not be determined through steady-state analysis alone. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901399f [article] Design methodology for screening dynamic characteristics of candidate heat - integrated flowsheets [texte imprimé] / Robert J. Brende, Auteur ; Prasad S. Dhurjati, Auteur . - 2011 . - pp. 9877–9886. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9877–9886 Mots-clés : Heat  integrated  Dynamic Résumé : Well-established design methods exist for generating candidate heat-exchanger networks (HENs), but there is a strong need for a methodology to screen for undesirable dynamic characteristics that are often observed in heat-integrated processes. In this paper, a simple transfer function-based method is developed that can assist in comparing dynamic behavior of candidate heat-integrated flowsheets. Use of the method allows the design engineer to determine the dynamic characteristics of the overall process shortly after identifying exchanger networks that satisfy the process heat balance. Mathematical development of the method is given, followed by explanations of its use. The basis of the method is developed in block-diagram format, making apparent the source of positive feedback that can result from adding heat integration to a process. Finally, the method is demonstrated on three candidate HENs for a simple process. The method allows for identification of dynamic characteristics that would not be determined through steady-state analysis alone. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901399f