Documents disponibles écrits par cet auteur

Evolution of resource allocation networks / Ashish K. Das in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7152–7167 Titre : Evolution of resource allocation networks Type de document : texte imprimé Auteurs : Ashish K. Das, Auteur ; Uday V. Shenoy, Auteur ; Santanu Bandyopadhyay, Auteur Année de publication : 2009 Article en page(s) : pp. 7152–7167 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Resource  allocation  network  Graph  theoryProcess  integration Résumé : It is often desirable to evolve a resource allocation network (RAN) into a simpler one for improved controllability, operability, and ease of implementation. In this paper, a methodology, based on the concept of graph theory and process integration, is proposed to evolve a preliminary RAN into a simpler one involving fewer interconnections (matches) by incurring the minimum resource penalty. The proposed methodology is essentially based on four evolution strategies: loop breaking without violation, two-loop relaxation, loop breaking with path relaxation, and direct path elimination. The procedure is applied to various RANs such as water allocation, hydrogen allocation, and material allocation in a reuse network. The evolved networks are compared with results obtained from a new mathematical optimization formulation involving mixed integer linear programming. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9003392 [article] Evolution of resource allocation networks [texte imprimé] / Ashish K. Das, Auteur ; Uday V. Shenoy, Auteur ; Santanu Bandyopadhyay, Auteur . - 2009 . - pp. 7152–7167. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7152–7167 Mots-clés : Resource  allocation  network  Graph  theoryProcess  integration Résumé : It is often desirable to evolve a resource allocation network (RAN) into a simpler one for improved controllability, operability, and ease of implementation. In this paper, a methodology, based on the concept of graph theory and process integration, is proposed to evolve a preliminary RAN into a simpler one involving fewer interconnections (matches) by incurring the minimum resource penalty. The proposed methodology is essentially based on four evolution strategies: loop breaking without violation, two-loop relaxation, loop breaking with path relaxation, and direct path elimination. The procedure is applied to various RANs such as water allocation, hydrogen allocation, and material allocation in a reuse network. The evolved networks are compared with results obtained from a new mathematical optimization formulation involving mixed integer linear programming. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9003392

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

Public ISBD [article]  in Industrial & 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

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

Public ISBD [article]  in Industrial & 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

Optimum design of battery-integrated diesel generator systems incorporating demand uncertainty / Arun P. in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4908–4916 Titre : Optimum design of battery-integrated diesel generator systems incorporating demand uncertainty Type de document : texte imprimé Auteurs : Arun P., Auteur ; Rangan Banerjee, Auteur ; Santanu Bandyopadhyay, Auteur Année de publication : 2009 Article en page(s) : pp. 4908–4916 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Diesel  generator  system  Battery  integrated  Demand  uncertainty  System  reliability  values Résumé : A diesel generator system, integrated with battery, is one of the options for decentralized power production in remote locations. The principles of process system engineering along with the concept of design space approach for system design have been employed to optimize a battery integrated diesel generator system. The design space is the set of all feasible design options, generated using time series simulation of the entire system. In this paper, a methodology is proposed to appropriately size a battery integrated diesel generator system incorporating uncertainty associated with the demand. Chance constrained programming approach is combined with the design space approach to incorporate the demand uncertainty at the design stage. With a known distribution of the demand, the proposed methodology helps in identifying a sizing curve on the diesel generator rating versus storage capacity diagram for a specified reliability level. The system reliability values given by the proposed approach are validated using sequential Monte Carlo simulation approach through illustrative examples. Sets of sizing curves may be generated for different confidence levels as required by the designer. However, under the simplified assumption of a constant coefficient of variation for the demand, these sizing curves can be combined into a single curve. The cost of energy of the system is minimized to select the optimum configuration for different reliability levels. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8014236 [article] Optimum design of battery-integrated diesel generator systems incorporating demand uncertainty [texte imprimé] / Arun P., Auteur ; Rangan Banerjee, Auteur ; Santanu Bandyopadhyay, Auteur . - 2009 . - pp. 4908–4916. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4908–4916 Mots-clés : Diesel  generator  system  Battery  integrated  Demand  uncertainty  System  reliability  values Résumé : A diesel generator system, integrated with battery, is one of the options for decentralized power production in remote locations. The principles of process system engineering along with the concept of design space approach for system design have been employed to optimize a battery integrated diesel generator system. The design space is the set of all feasible design options, generated using time series simulation of the entire system. In this paper, a methodology is proposed to appropriately size a battery integrated diesel generator system incorporating uncertainty associated with the demand. Chance constrained programming approach is combined with the design space approach to incorporate the demand uncertainty at the design stage. With a known distribution of the demand, the proposed methodology helps in identifying a sizing curve on the diesel generator rating versus storage capacity diagram for a specified reliability level. The system reliability values given by the proposed approach are validated using sequential Monte Carlo simulation approach through illustrative examples. Sets of sizing curves may be generated for different confidence levels as required by the designer. However, under the simplified assumption of a constant coefficient of variation for the demand, these sizing curves can be combined into a single curve. The cost of energy of the system is minimized to select the optimum configuration for different reliability levels. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8014236

A rigorous targeting to minimize resource requirement in batch processes / Nitin Dutt Chaturvedi in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 8015-8024 Titre : A rigorous targeting to minimize resource requirement in batch processes Type de document : texte imprimé Auteurs : Nitin Dutt Chaturvedi, Auteur ; Santanu Bandyopadhyay, Auteur Année de publication : 2012 Article en page(s) : pp. 8015-8024 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Batchwise Résumé : Mathematically rigorous methodologies to target the minimum resource requirement for a batch process are proposed in this paper. The proposed methodologies guarantee the minimum resource requirement for single as well as cyclic batch operations. The methodologies are applicable to both semicontinuous and truly batch processes. Based on the rigorous mathematical arguments, it has been proved that, for a single batch operation, targeting through sequential transfer of waste from one time interval to the next time interval always leads to the overall minimum resource requirement. On the other hand, for a cyclic batch process all the time intervals may be collapsed as a single interval and the minimum resource requirement can be targeted directly. The proposed methodology is applicable to any fixed flow rate and fixed scheduled batch process involving a single quality. The applicability of the proposed algorithm is demonstrated through illustrative examples. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990314 [article] A rigorous targeting to minimize resource requirement in batch processes [texte imprimé] / Nitin Dutt Chaturvedi, Auteur ; Santanu Bandyopadhyay, Auteur . - 2012 . - pp. 8015-8024. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 8015-8024 Mots-clés : Batchwise Résumé : Mathematically rigorous methodologies to target the minimum resource requirement for a batch process are proposed in this paper. The proposed methodologies guarantee the minimum resource requirement for single as well as cyclic batch operations. The methodologies are applicable to both semicontinuous and truly batch processes. Based on the rigorous mathematical arguments, it has been proved that, for a single batch operation, targeting through sequential transfer of waste from one time interval to the next time interval always leads to the overall minimum resource requirement. On the other hand, for a cyclic batch process all the time intervals may be collapsed as a single interval and the minimum resource requirement can be targeted directly. The proposed methodology is applicable to any fixed flow rate and fixed scheduled batch process involving a single quality. The applicability of the proposed algorithm is demonstrated through illustrative examples. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990314