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

Design and optimization of indirect energy storage systems for batch process plants / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 47 n°14 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4817–4829 Titre : Design and optimization of indirect energy storage systems for batch process plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Ying-Jyuan Ciou, Auteur Année de publication : 2008 Article en page(s) : p. 4817–4829 Langues : Anglais (eng) Mots-clés : Indirect  heat  exchange  network;  Thermal  storage  policy;  Batch  plant Résumé : One of the main difficulties for handling heat integration problems in batch plants is the time-dependent existence of hot/cold process streams during time period p. This article aims at proposing a generic method for synthesizing an indirect heat exchange network and its associated thermal storage policy for targeting the external utility in a batch plant. Therein, a heat transfer medium (HTM), originally staying in a cold tank, is used to absorb surplus heat from hot process streams, and the HTM with elevated temperature is temporarily stored in a hot tank. The accumulated hot HTM is then utilized to heat subsequent cold process streams, and the cooled HTM recirculates back into its source cold tank. The limitation of heat interchange between time-dependent hot/cold process streams can be relaxed by applying the recirculated heat transfer medium to carry out indirect thermal storage. A superstructure is proposed and the mathematical programming approach is applied for investigating the indirect heat exchange policy. Not using any heuristics that are based on the concepts of pinch limitations, the proposed superstructure-based representation for synthesis of indirect heat exchange networks (HEN’s) for batch processes is formulated as a mixed-integer nonlinear program (MINLP). Numerical examples are explored to demonstrate the applicability of proposed indirect HEN synthesis method for batch processes. This method is verified by two examples with different numbers of storage tanks. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0710667 [article] Design and optimization of indirect energy storage systems for batch process plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Ying-Jyuan Ciou, Auteur . - 2008 . - p. 4817–4829. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°14 (Juillet 2008) . - p. 4817–4829 Mots-clés : Indirect  heat  exchange  network;  Thermal  storage  policy;  Batch  plant Résumé : One of the main difficulties for handling heat integration problems in batch plants is the time-dependent existence of hot/cold process streams during time period p. This article aims at proposing a generic method for synthesizing an indirect heat exchange network and its associated thermal storage policy for targeting the external utility in a batch plant. Therein, a heat transfer medium (HTM), originally staying in a cold tank, is used to absorb surplus heat from hot process streams, and the HTM with elevated temperature is temporarily stored in a hot tank. The accumulated hot HTM is then utilized to heat subsequent cold process streams, and the cooled HTM recirculates back into its source cold tank. The limitation of heat interchange between time-dependent hot/cold process streams can be relaxed by applying the recirculated heat transfer medium to carry out indirect thermal storage. A superstructure is proposed and the mathematical programming approach is applied for investigating the indirect heat exchange policy. Not using any heuristics that are based on the concepts of pinch limitations, the proposed superstructure-based representation for synthesis of indirect heat exchange networks (HEN’s) for batch processes is formulated as a mixed-integer nonlinear program (MINLP). Numerical examples are explored to demonstrate the applicability of proposed indirect HEN synthesis method for batch processes. This method is verified by two examples with different numbers of storage tanks. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0710667

Design and optimization of steam distribution systems for steam power plants / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8097-8109 Titre : Design and optimization of steam distribution systems for steam power plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Chih-Yao Lin, Auteur Année de publication : 2011 Article en page(s) : pp. 8097-8109 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Power  plant  Water  vapor  Optimization  Design Résumé : This paper presents a systematic methodology for the design of a steam distribution network (SDN) which satisfies the energy demands of industrial processes. A superstructure is proposed to include all potential configurations of steam systems, and a mixed-integer nonlinear programming (MINLP) model is formulated accordingly to minimize the total annualized cost. The proposed model determines simultaneously (i) the structure and operational configuration of a steam system and (ii) the interaction between the steam system and the heat recovery system. A series of case studies are presented to demonstrate the feasibility and benefit of the proposed approach. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332136 [article] Design and optimization of steam distribution systems for steam power plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Chih-Yao Lin, Auteur . - 2011 . - pp. 8097-8109. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8097-8109 Mots-clés : Power  plant  Water  vapor  Optimization  Design Résumé : This paper presents a systematic methodology for the design of a steam distribution network (SDN) which satisfies the energy demands of industrial processes. A superstructure is proposed to include all potential configurations of steam systems, and a mixed-integer nonlinear programming (MINLP) model is formulated accordingly to minimize the total annualized cost. The proposed model determines simultaneously (i) the structure and operational configuration of a steam system and (ii) the interaction between the steam system and the heat recovery system. A series of case studies are presented to demonstrate the feasibility and benefit of the proposed approach. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332136

Design of entire energy system for chemical plants / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 51 N° 30 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 9980-9996 Titre : Design of entire energy system for chemical plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Chih-Yao Lin, Auteur Année de publication : 2012 Article en page(s) : pp. 9980-9996 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chemical  plant  Design Résumé : This paper presents a systematic methodology for the synthesis of an entire energy system for chemical plants, which explores the interactions between the steam network and the heat recovery networks of process plants. The energy system is designed not only to meet the heating and power demands from an individual chemical process, but also to consider possibilities of energy transfer among holistic sites. In this paper, energy utilization across different plants is studied. Specifically, indirect and direct energy integation strategies are adopted for the design of the whole energy system to maximize the possible integration. With the energy integration strategies for the overall systems, the utility consumption can be reduced and the total annualized cost minimized. Case studies are presented to demonstrate the applicability and significant economic benefits of the proposed model when applied to industrial problems. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201411 [article] Design of entire energy system for chemical plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Chih-Yao Lin, Auteur . - 2012 . - pp. 9980-9996. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 30 (Août 2012) . - pp. 9980-9996 Mots-clés : Chemical  plant  Design Résumé : This paper presents a systematic methodology for the synthesis of an entire energy system for chemical plants, which explores the interactions between the steam network and the heat recovery networks of process plants. The energy system is designed not only to meet the heating and power demands from an individual chemical process, but also to consider possibilities of energy transfer among holistic sites. In this paper, energy utilization across different plants is studied. Specifically, indirect and direct energy integation strategies are adopted for the design of the whole energy system to maximize the possible integration. With the energy integration strategies for the overall systems, the utility consumption can be reduced and the total annualized cost minimized. Case studies are presented to demonstrate the applicability and significant economic benefits of the proposed model when applied to industrial problems. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26201411

Design of indirect heat recovery systems with variable-temperature storage for batch plants / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4375–4387 Titre : Design of indirect heat recovery systems with variable-temperature storage for batch plants Type de document : texte imprimé Auteurs : Cheng-Liang Chen, Auteur ; Ying-Jyuan Ciou, Auteur Année de publication : 2009 Article en page(s) : pp. 4375–4387 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Heat  recovery  system  Batch  plant  Variable-temperature  storage  Heat  transfer  medium Résumé : This article aims to propose an iterative method for designing an indirect heat recovery system including the associated variable-temperature storage in a batch plant. A recirculated heat transfer medium (HTM) is applied to absorb surplus heat load from hot process streams and temporarily reserved in storage tanks, where the accumulated energy is then released to later cold process streams by exchanging heat with HTM. This work is a direct extension of one recent article where the restraint of constant temperature for HTM in each storage tank is relaxed to magnify the heat recovery potential. The design problem is formulated as a mixed-integer nonlinear program (MINLP) based on proposed superstructures. A novel iterative solution strategy for setting the variable temperatures of HTM in storage is provided by linking the network optimization tool (a GAMS program) and the streams temperature simulation software (a MATLAB program). One numerical example is explored to demonstrate the applicability of the proposed indirect heat exchanger network design method for batch processes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013633 [article] Design of indirect heat recovery systems with variable-temperature storage for batch plants [texte imprimé] / Cheng-Liang Chen, Auteur ; Ying-Jyuan Ciou, Auteur . - 2009 . - pp. 4375–4387. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4375–4387 Mots-clés : Heat  recovery  system  Batch  plant  Variable-temperature  storage  Heat  transfer  medium Résumé : This article aims to propose an iterative method for designing an indirect heat recovery system including the associated variable-temperature storage in a batch plant. A recirculated heat transfer medium (HTM) is applied to absorb surplus heat load from hot process streams and temporarily reserved in storage tanks, where the accumulated energy is then released to later cold process streams by exchanging heat with HTM. This work is a direct extension of one recent article where the restraint of constant temperature for HTM in each storage tank is relaxed to magnify the heat recovery potential. The design problem is formulated as a mixed-integer nonlinear program (MINLP) based on proposed superstructures. A novel iterative solution strategy for setting the variable temperatures of HTM in storage is provided by linking the network optimization tool (a GAMS program) and the streams temperature simulation software (a MATLAB program). One numerical example is explored to demonstrate the applicability of the proposed indirect heat exchanger network design method for batch processes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013633

Model-based insulin therapy scheduling / Cheng-Liang Chen in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

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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) 

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