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Improvement on the simultaneous optimization approach for heat exchanger network synthesis / Guoqing Li in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6455–6460 Titre : Improvement on the simultaneous optimization approach for heat exchanger network synthesis Type de document : texte imprimé Auteurs : Guoqing Li, Auteur ; Yushu Luo, Auteur ; Yong Xia, Auteur Année de publication : 2012 Article en page(s) : pp. 6455–6460 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Optimization  Heat  exchanger Résumé : In this article, three corrections are applied to improve the simultaneous optimization synthesis approach (SOSA) of heat exchanger networks (HENs). First, the temperature-dependent characteristics of process streams are considered in calculating their heat capacities, which are regarded as constant within a defined temperature interval; second, splitters and mixers of streams located in the network are listed as investment items, resulting in more detailed HEN cost calculations; third, a group of heuristic rules is suggested to cancel superstructure matches that are impossible in terms of engineering or thermodynamics before the optimization calculation, making the simultaneous optimizations on both investment cost and utility consumption charge available while also saving significant computation time. Based on these corrections, an improved SOSA is developed in which an MINLP model is solved by the use of genetic algorithms to avoid being trapped in a local optimum. A case study shows that this approach realizes significant progress in both precision and computation-time savings. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202271h [article] Improvement on the simultaneous optimization approach for heat exchanger network synthesis [texte imprimé] / Guoqing Li, Auteur ; Yushu Luo, Auteur ; Yong Xia, Auteur . - 2012 . - pp. 6455–6460. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6455–6460 Mots-clés : Optimization  Heat  exchanger Résumé : In this article, three corrections are applied to improve the simultaneous optimization synthesis approach (SOSA) of heat exchanger networks (HENs). First, the temperature-dependent characteristics of process streams are considered in calculating their heat capacities, which are regarded as constant within a defined temperature interval; second, splitters and mixers of streams located in the network are listed as investment items, resulting in more detailed HEN cost calculations; third, a group of heuristic rules is suggested to cancel superstructure matches that are impossible in terms of engineering or thermodynamics before the optimization calculation, making the simultaneous optimizations on both investment cost and utility consumption charge available while also saving significant computation time. Based on these corrections, an improved SOSA is developed in which an MINLP model is solved by the use of genetic algorithms to avoid being trapped in a local optimum. A case study shows that this approach realizes significant progress in both precision and computation-time savings. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202271h