Heat integration in process water networks / Joel George in Industrial & engineering chemistry research, Vol. 50 N° 7 (Avril 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3695–3704 Titre : Heat integration in process water networks Type de document : texte imprimé Auteurs : Joel George, Auteur ; Gopal Chandra Sahu, Auteur ; Santanu Bandyopadhyay, Auteur Année de publication : 2011 Article en page(s) : pp. 3695–3704 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Water networks Résumé : A mathematical optimization approach for targeting the minimum utility consumption in heat-integrated process water networks is proposed in this paper. The linear programming formulations are developed for heat integration in fixed flow rate water allocation networks, for both single and multiple contaminants, incorporating isothermal mixing. Heat integration in water allocation networks is also addressed through nonisothermal mixing of streams, and this is formulated as a discontinuous nonlinear programming problem. Utility requirements, for isothermal as well as for nonisothermal mixing, are compared over a range of minimum approach temperatures to evaluate the energy performance using illustrative examples. The number of required heat exchangers is less in heat-integrated water allocation problems with nonisothermal mixing. Simultaneous optimization of the overall heat-integrated water allocation network, to minimize the operating cost, is also formulated and solved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101098a [article] Heat integration in process water networks [texte imprimé] / Joel George, Auteur ; Gopal Chandra Sahu, Auteur ; Santanu Bandyopadhyay, Auteur . - 2011 . - pp. 3695–3704. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3695–3704 Mots-clés : Water networks Résumé : A mathematical optimization approach for targeting the minimum utility consumption in heat-integrated process water networks is proposed in this paper. The linear programming formulations are developed for heat integration in fixed flow rate water allocation networks, for both single and multiple contaminants, incorporating isothermal mixing. Heat integration in water allocation networks is also addressed through nonisothermal mixing of streams, and this is formulated as a discontinuous nonlinear programming problem. Utility requirements, for isothermal as well as for nonisothermal mixing, are compared over a range of minimum approach temperatures to evaluate the energy performance using illustrative examples. The number of required heat exchangers is less in heat-integrated water allocation problems with nonisothermal mixing. Simultaneous optimization of the overall heat-integrated water allocation network, to minimize the operating cost, is also formulated and solved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101098a

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Modified problem table algorithm for energy targeting / Santanu Bandyopadhyay in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11557–11563 Titre : Modified problem table algorithm for energy targeting Type de document : texte imprimé Auteurs : Santanu Bandyopadhyay, Auteur ; Gopal Chandra Sahu, Auteur Année de publication : 2011 Article en page(s) : pp. 11557–11563 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Energy Résumé : A simple modification of the original problem table algorithm (PTA) to target the minimum utility requirements in a heat exchanger network is proposed in this paper. The modified problem table algorithm (MPTA) eliminates the requirement of identification of streams to determine the net heat capacity flow rate at each temperature interval. Targeted utility requirements and the grand composite curve for the heat exchanger network problem are identical for both the original PTA and the proposed MPTA. This simple but fundamental change in the proposed MPTA, enhances its applicability to target the minimum external utility requirements in some special cases of heat-integrated water allocation networks. Pedagogical importance of the proposed MPTA is also discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101472h [article] Modified problem table algorithm for energy targeting [texte imprimé] / Santanu Bandyopadhyay, Auteur ; Gopal Chandra Sahu, Auteur . - 2011 . - pp. 11557–11563. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11557–11563 Mots-clés : Energy Résumé : A simple modification of the original problem table algorithm (PTA) to target the minimum utility requirements in a heat exchanger network is proposed in this paper. The modified problem table algorithm (MPTA) eliminates the requirement of identification of streams to determine the net heat capacity flow rate at each temperature interval. Targeted utility requirements and the grand composite curve for the heat exchanger network problem are identical for both the original PTA and the proposed MPTA. This simple but fundamental change in the proposed MPTA, enhances its applicability to target the minimum external utility requirements in some special cases of heat-integrated water allocation networks. Pedagogical importance of the proposed MPTA is also discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101472h

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