| Titre : | New continuous-time scheduling formulation for continuous plants under variable electricity cost (2009) |
| Auteurs : | Pedro M. Castro, Auteur ; Iiro Harjunkoski, Auteur ; Ignacio E. Grossmann, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 14, Juillet 2009) |
| Article en page(s) : | pp. 6701–6714 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Continuous plants Scheduling Time-dependent electricity pricing Discrete-time formulation Continuous-time |
| Résumé : | This work addresses the scheduling of continuous plants subject to energy constraints related to time-dependent electricity pricing and availability. Discrete- and continuous-time formulations are presented that can address these issues together with multiple intermediate due dates. Both formulations rely on the resource−task network process representation. Their computational performance is compared for the objective of total electricity minimization with the results favoring the discrete-time model due to the more natural way of handling such a wide variety of discrete events. In particular, it can successfully handle problems of industrial size. Nevertheless, the new continuous-time model is a major breakthrough since it is the first model of its type that is able to effectively incorporate time-variable utility profiles. When compared to a simple manual scheduling procedure, the proposed scheduling approaches can lead to potential electricity savings around 20% by switching production from periods of high to low electricity cost. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie900073k |
