Documents disponibles écrits par cet auteur

Continuous-time formulation for the synthesis of water-using networks in batch plants / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 47 N°20 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7818-7832 Titre : Continuous-time formulation for the synthesis of water-using networks in batch plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Chia-Yuan Chang, Auteur ; Jui-Yuan Lee, Auteur Année de publication : 2008 Article en page(s) : P. 7818-7832 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Water  Mixed-integer  nonlinear  program  (MINLP) Résumé : Water minimization is conducted by exploiting all possibilities of water reuse and recycle to reduce the freshwater consumption, as well as the wastewater generation. Because the starting and finishing times of batch water-using tasks are dependent on the production schedule as the inherent time dependence in batch processes, storage facilities are commonly equipped for the temporary storage of reusable water to partially bypass the time limitation. With a fixed production schedule, this paper presents a mathematical formulation for the synthesis of water-using networks in batch plants. Superstructures that incorporate all possible flow connections are built for modeling the batch water system. The proposed formulation is based on a continuous-time representation where different design objectives have been considered for an applicable network configuration. The design problems for the minimization of freshwater consumption, storage capacity, and the amount of connecting flows are formulated as nonlinear programs (NLPs), whereas the design problem for minimizing the number of connections will be a mixed-integer nonlinear program (MINLP). Representative examples from literature are provided to demonstrate the effectiveness of proposed formulation. Furthermore, the application of a fictitious contaminant is also developed, to address the forbidden match between assigned water-using tasks. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800573r [article] Continuous-time formulation for the synthesis of water-using networks in batch plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Chia-Yuan Chang, Auteur ; Jui-Yuan Lee, Auteur . - 2008 . - P. 7818-7832. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°20 (Octobre 2008) . - P. 7818-7832 Mots-clés : Water  Mixed-integer  nonlinear  program  (MINLP) Résumé : Water minimization is conducted by exploiting all possibilities of water reuse and recycle to reduce the freshwater consumption, as well as the wastewater generation. Because the starting and finishing times of batch water-using tasks are dependent on the production schedule as the inherent time dependence in batch processes, storage facilities are commonly equipped for the temporary storage of reusable water to partially bypass the time limitation. With a fixed production schedule, this paper presents a mathematical formulation for the synthesis of water-using networks in batch plants. Superstructures that incorporate all possible flow connections are built for modeling the batch water system. The proposed formulation is based on a continuous-time representation where different design objectives have been considered for an applicable network configuration. The design problems for the minimization of freshwater consumption, storage capacity, and the amount of connecting flows are formulated as nonlinear programs (NLPs), whereas the design problem for minimizing the number of connections will be a mixed-integer nonlinear program (MINLP). Representative examples from literature are provided to demonstrate the effectiveness of proposed formulation. Furthermore, the application of a fictitious contaminant is also developed, to address the forbidden match between assigned water-using tasks. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800573r

Resource - task network approach to simultaneous scheduling and water minimization of batch plants / Cheng-Liang Chen 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. 3660–3674 Titre : Resource - task network approach to simultaneous scheduling and water minimization of batch plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Chia-Yuan Chang, Auteur ; Jui-Yuan Lee, Auteur Année de publication : 2011 Article en page(s) : pp. 3660–3674 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Water  minimization  multipurpose  batch  plants. Résumé : This paper presents a mathematical model for simultaneous scheduling and water minimization in multipurpose batch plants. The scheduling framework is based on the Resource-Task Network, with the objective function that represents the profit taking into account the net income from production and water-related costs. Because of the bilinear terms appearing in the mass balance equations, the overall formulation is a mixed-integer nonlinear program, which is generally more difficult to solve than a mixed-integer linear program or a nonlinear program. A solution strategy that involves relaxation linearization is therefore developed to facilitate the computation. Two literature examples are used to illustrate the proposed approach. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007536 [article] Resource - task network approach to simultaneous scheduling and water minimization of batch plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Chia-Yuan Chang, Auteur ; Jui-Yuan Lee, Auteur . - 2011 . - pp. 3660–3674. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3660–3674 Mots-clés : Water  minimization  multipurpose  batch  plants. Résumé : This paper presents a mathematical model for simultaneous scheduling and water minimization in multipurpose batch plants. The scheduling framework is based on the Resource-Task Network, with the objective function that represents the profit taking into account the net income from production and water-related costs. Because of the bilinear terms appearing in the mass balance equations, the overall formulation is a mixed-integer nonlinear program, which is generally more difficult to solve than a mixed-integer linear program or a nonlinear program. A solution strategy that involves relaxation linearization is therefore developed to facilitate the computation. Two literature examples are used to illustrate the proposed approach. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007536