Documents disponibles écrits par cet auteur

Automated targeting technique for single-impurity resource conservation networks. Part 1: direct reuse/recycle / Denny Kok Sum Ng in Industrial & engineering chemistry research, Vol. 48 N° 16 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7637–7646 Titre : Automated targeting technique for single-impurity resource conservation networks. Part 1: direct reuse/recycle Type de document : texte imprimé Auteurs : Denny Kok Sum Ng, Auteur ; Dominic Chwan Yee Foo, Auteur Année de publication : 2009 Article en page(s) : pp. 7637–7646 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Automated  targeting  technique  Single-impurity  resource  conservation  network  Targeting  technique Résumé : This pair of articles presents an optimization-based, automated procedure to determine the minimum resource consumption/target(s) for a single-impurity resource conservation network (RCN). This optimization-based targeting technique provides the same benefits as conventional insight-based pinch analysis, in yielding various targets for an RCN prior to detailed design. In addition, flexibility in setting the objective function is the major advantage of the automated targeting approach over a conventional pinch analysis technique. The model formulation is linear, which ensures that a global optimum can be found if one exists. In part 1 of this pair of articles, the model for direct material reuse/recycle is presented. Its application is then demonstrated for single, multiple, and impure external resources using several literature examples. Part 2 of this pair of articles extends the automated targeting technique for RCNs with waste-interception (regeneration) placement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900120y [article] Automated targeting technique for single-impurity resource conservation networks. Part 1: direct reuse/recycle [texte imprimé] / Denny Kok Sum Ng, Auteur ; Dominic Chwan Yee Foo, Auteur . - 2009 . - pp. 7637–7646. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7637–7646 Mots-clés : Automated  targeting  technique  Single-impurity  resource  conservation  network  Targeting  technique Résumé : This pair of articles presents an optimization-based, automated procedure to determine the minimum resource consumption/target(s) for a single-impurity resource conservation network (RCN). This optimization-based targeting technique provides the same benefits as conventional insight-based pinch analysis, in yielding various targets for an RCN prior to detailed design. In addition, flexibility in setting the objective function is the major advantage of the automated targeting approach over a conventional pinch analysis technique. The model formulation is linear, which ensures that a global optimum can be found if one exists. In part 1 of this pair of articles, the model for direct material reuse/recycle is presented. Its application is then demonstrated for single, multiple, and impure external resources using several literature examples. Part 2 of this pair of articles extends the automated targeting technique for RCNs with waste-interception (regeneration) placement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900120y

Automated targeting technique for single-impurity resource conservation networks. Part 2: single-pass and partitioning waste-interception systems / Denny Kok Sum Ng in Industrial & engineering chemistry research, Vol. 48 N° 16 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7647–7661 Titre : Automated targeting technique for single-impurity resource conservation networks. Part 2: single-pass and partitioning waste-interception systems Type de document : texte imprimé Auteurs : Denny Kok Sum Ng, Auteur ; Dominic Chwan Yee Foo, Auteur Année de publication : 2009 Article en page(s) : pp. 7647–7661 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Resource  conservation  network  Automated  targeting  technique  Waste-interception  systems Résumé : Part 1 of this pair of articles presents an automated targeting technique to identify minimum fresh resource flow rate/cost targets in a resource conservation network (RCN) with material reuse/recycle. After the potential for conservation through direct reuse/recycle is exhausted, fresh resource consumption can be further reduced by incorporating waste-interception (regeneration) processes. Hence, the proposed automated targeting technique in part 1 of this pair of articles is extended to determine the targets for RCNs with interception placement. The waste-interception systems are modeled as treatment processes with either fixed outlet concentrations or fixed impurity load removal ratios. The approach also distinguishes between single-pass and partitioning regenerators, which have different implications for RCNs. Literature examples and industrial cases are solved to illustrate the proposed approach. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900127r [article] Automated targeting technique for single-impurity resource conservation networks. Part 2: single-pass and partitioning waste-interception systems [texte imprimé] / Denny Kok Sum Ng, Auteur ; Dominic Chwan Yee Foo, Auteur . - 2009 . - pp. 7647–7661. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 16 (Août 2009) . - pp. 7647–7661 Mots-clés : Resource  conservation  network  Automated  targeting  technique  Waste-interception  systems Résumé : Part 1 of this pair of articles presents an automated targeting technique to identify minimum fresh resource flow rate/cost targets in a resource conservation network (RCN) with material reuse/recycle. After the potential for conservation through direct reuse/recycle is exhausted, fresh resource consumption can be further reduced by incorporating waste-interception (regeneration) processes. Hence, the proposed automated targeting technique in part 1 of this pair of articles is extended to determine the targets for RCNs with interception placement. The waste-interception systems are modeled as treatment processes with either fixed outlet concentrations or fixed impurity load removal ratios. The approach also distinguishes between single-pass and partitioning regenerators, which have different implications for RCNs. Literature examples and industrial cases are solved to illustrate the proposed approach. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900127r

Synthesis of direct and indirect interplant water network / Irene Mei Leng Chew in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9485–9496 Titre : Synthesis of direct and indirect interplant water network Type de document : texte imprimé Auteurs : Irene Mei Leng Chew, Auteur ; Raymond Tan, Auteur ; Denny Kok Sum Ng, Auteur Année de publication : 2009 Article en page(s) : p. 9485–9496 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Water  network Résumé : To date, most work on water network synthesis has been focusing on a single water network. The increase of public awareness toward industrial ecology has inspired new research into interplant water integration (IPWI). In this context, each water network may be grouped according to the geographical location of the water-using processes or as different plants operated by different business entities. Water source(s) from one network may be reused/recycled to sink(s) in another network. In this work, two different IPWI schemes, that is, “direct” and “indirect” integration are analyzed using mathematical optimization techniques. In the former, water from different networks is integrated directly via cross-plant pipeline(s). A mixed integer linear program (MILP) model is formulated and solved to achieve a globally optimal solution. In the latter, water from different networks is integrated indirectly via a centralized utility hub. The centralized utility hub serves to collect and redistribute water to the individual plants, and may even function as a shared water regeneration unit. For the indirect integration scheme, a mixed integer nonlinear program (MINLP) is formulated and solved using a relaxation linearization technique to obtain an optimal solution. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800072r#afn1 [article] Synthesis of direct and indirect interplant water network [texte imprimé] / Irene Mei Leng Chew, Auteur ; Raymond Tan, Auteur ; Denny Kok Sum Ng, Auteur . - 2009 . - p. 9485–9496. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9485–9496 Mots-clés : Water  network Résumé : To date, most work on water network synthesis has been focusing on a single water network. The increase of public awareness toward industrial ecology has inspired new research into interplant water integration (IPWI). In this context, each water network may be grouped according to the geographical location of the water-using processes or as different plants operated by different business entities. Water source(s) from one network may be reused/recycled to sink(s) in another network. In this work, two different IPWI schemes, that is, “direct” and “indirect” integration are analyzed using mathematical optimization techniques. In the former, water from different networks is integrated directly via cross-plant pipeline(s). A mixed integer linear program (MILP) model is formulated and solved to achieve a globally optimal solution. In the latter, water from different networks is integrated indirectly via a centralized utility hub. The centralized utility hub serves to collect and redistribute water to the individual plants, and may even function as a shared water regeneration unit. For the indirect integration scheme, a mixed integer nonlinear program (MINLP) is formulated and solved using a relaxation linearization technique to obtain an optimal solution. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800072r#afn1