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A disjunctive programming model for simultaneous synthesis and detailed design of cooling networks / José María Ponce-Ortega in Industrial & engineering chemistry research, Vol. 48 N° 6 (Mars 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2991–3003 Titre : A disjunctive programming model for simultaneous synthesis and detailed design of cooling networks Type de document : texte imprimé Auteurs : José María Ponce-Ortega, Auteur ; Medardo Serna-González, Auteur ; Arturo Jimenez-Gutierrez, Auteur Année de publication : 2009 Article en page(s) : pp. 2991–3003 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Cooling  networks  Disjunctive  programming  formulation  Optimum  cooling  network  configuration  Mechanical  design  Thermal-hydraulic  variables Résumé : This paper presents a model that simultaneously considers synthesis and detailed design aspects of cooling networks. The model is based on a generalized disjunctive programming formulation that is transformed into a mixed-integer nonlinear program. The objective function is to minimize the total annual cost, which accounts for the cold utility consumption cost, the capital cost for the coolers and pumps, and the pumping costs. The model uses a stagewise superstructure that allows combinations of cooler arrangements in series or in parallel, as well as bypass, mixing, and splitting of the cold utility. The model also incorporates several constraints to meet some specified design codes. In addition to the optimum cooling network configuration, the solution provides the details on the mechanical design features and thermal−hydraulic variables of each cooler unit. Three example problems are presented to show the application of the proposed model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8015494 [article] A disjunctive programming model for simultaneous synthesis and detailed design of cooling networks [texte imprimé] / José María Ponce-Ortega, Auteur ; Medardo Serna-González, Auteur ; Arturo Jimenez-Gutierrez, Auteur . - 2009 . - pp. 2991–3003. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2991–3003 Mots-clés : Cooling  networks  Disjunctive  programming  formulation  Optimum  cooling  network  configuration  Mechanical  design  Thermal-hydraulic  variables Résumé : This paper presents a model that simultaneously considers synthesis and detailed design aspects of cooling networks. The model is based on a generalized disjunctive programming formulation that is transformed into a mixed-integer nonlinear program. The objective function is to minimize the total annual cost, which accounts for the cold utility consumption cost, the capital cost for the coolers and pumps, and the pumping costs. The model uses a stagewise superstructure that allows combinations of cooler arrangements in series or in parallel, as well as bypass, mixing, and splitting of the cold utility. The model also incorporates several constraints to meet some specified design codes. In addition to the optimum cooling network configuration, the solution provides the details on the mechanical design features and thermal−hydraulic variables of each cooler unit. Three example problems are presented to show the application of the proposed model. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8015494

Synthesis of heat exchanger networks with optimal placement of multiple utilities / José María Ponce-Ortega in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2849–2856 Titre : Synthesis of heat exchanger networks with optimal placement of multiple utilities Type de document : texte imprimé Auteurs : José María Ponce-Ortega, Auteur ; Medardo Serna-González, Auteur ; Arturo Jimenez-Gutierrez, Auteur Année de publication : 2010 Article en page(s) : pp. 2849–2856 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Heat  exchanger;  Networks;  Synthesis;  Utilities Résumé : The synthesis problem of optimal heat exchanger networks using multiple utilities is addressed. A mixed integer nonlinear programming (MINLP) model is developed based on a stagewise superstructure that contains all possible matches between hot and cold streams in every stage. Unlike previous MINLP formulations, exchanges of process streams with utilities are allowed in each stage of the superstructure to determine the optimal location of hot and cold utilities. The optimal choice of different types of available utilities is considered through a disjunctive programming formulation. The model can handle forbidden matches and required and restricted matches as well as isothermal and nonisothermal process streams. The MINLP problem is readily solved using commercial local solvers. Four examples are presented to show the application of the proposed methodology. No computation complications were observed in the examples presented, and they required small CPU times. Note de contenu : Bibogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901750a [article] Synthesis of heat exchanger networks with optimal placement of multiple utilities [texte imprimé] / José María Ponce-Ortega, Auteur ; Medardo Serna-González, Auteur ; Arturo Jimenez-Gutierrez, Auteur . - 2010 . - pp. 2849–2856. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2849–2856 Mots-clés : Heat  exchanger;  Networks;  Synthesis;  Utilities Résumé : The synthesis problem of optimal heat exchanger networks using multiple utilities is addressed. A mixed integer nonlinear programming (MINLP) model is developed based on a stagewise superstructure that contains all possible matches between hot and cold streams in every stage. Unlike previous MINLP formulations, exchanges of process streams with utilities are allowed in each stage of the superstructure to determine the optimal location of hot and cold utilities. The optimal choice of different types of available utilities is considered through a disjunctive programming formulation. The model can handle forbidden matches and required and restricted matches as well as isothermal and nonisothermal process streams. The MINLP problem is readily solved using commercial local solvers. Four examples are presented to show the application of the proposed methodology. No computation complications were observed in the examples presented, and they required small CPU times. Note de contenu : Bibogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901750a