[article] 
inIndustrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7967-7987

Titre :	Heuristic approach to incorporate timesharing schemes in multiperiod heat exchanger network designs
Type de document :	texte imprimé
Auteurs :	Efrat Sadeli, Auteur ; Chuei-Tin Chang, Auteur
Année de publication :	2012
Article en page(s) :	pp. 7967-7987
Note générale :	Industrial chemistry
Langues :	Anglais (eng)
Mots-clés :	Design Heat exchanger Meshed network Heuristic approach
Résumé :	Heat exchanger network (HEN) synthesis has been widely recognized as an effective design method for significant energy saving in industrial processes. Although traditionally its sole objective is to minimize the total annual cost, there are additional implementation issues which must be addressed in realistic multiperiod applications. In particular, if a conventional programming-based procedure is adopted for generating the optimal HEN structure, each embedded match inevitably calls for different heat-transfer areas in different periods. Since the usual practice is to select the largest unit, its operation in one (or more) period may be grossly inefficient because the corresponding overdesign level is simply too high. To circumvent this drawback, a modified mathematical model and a set of timesharing heuristics have been developed in this work to generate practical network configurations that can handle all heat duties. On the basis of the extensive case studies performed so far, it can be observed that this proposed approach is especially effective for multiperiod HEN design problems in which the process conditions vary significantly.
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=25990311

[article] Heuristic approach to incorporate timesharing schemes in multiperiod heat exchanger network designs [texte imprimé] / Efrat Sadeli, Auteur ; Chuei-Tin Chang, Auteur . - 2012 . - pp. 7967-7987.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7967-7987

Mots-clés :	Design Heat exchanger Meshed network Heuristic approach
Résumé :	Heat exchanger network (HEN) synthesis has been widely recognized as an effective design method for significant energy saving in industrial processes. Although traditionally its sole objective is to minimize the total annual cost, there are additional implementation issues which must be addressed in realistic multiperiod applications. In particular, if a conventional programming-based procedure is adopted for generating the optimal HEN structure, each embedded match inevitably calls for different heat-transfer areas in different periods. Since the usual practice is to select the largest unit, its operation in one (or more) period may be grossly inefficient because the corresponding overdesign level is simply too high. To circumvent this drawback, a modified mathematical model and a set of timesharing heuristics have been developed in this work to generate practical network configurations that can handle all heat duties. On the basis of the extensive case studies performed so far, it can be observed that this proposed approach is especially effective for multiperiod HEN design problems in which the process conditions vary significantly.
ISSN :	0888-5885
En ligne :	http://cat.inist.fr/?aModele=afficheN&cpsidt=25990311