Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2577
Título: Cyclic scheduling of pulp digesters with integrated heating tasks
Autor: Castro, Pedro
Rodrigues, Djêide
Matos, Henrique A.
Palavras-chave: Cyclic scheduling
Industrial applications
Heat integration
Data: 2014
Editora: ACS Publications - American Chemical Society
Citação: Castro, P.M.; Rodrigues, D.; Matos, H.A. - Cyclic scheduling of pulp digesters with integrated heating tasks. In: Industrial and Engineering Chemistry Research, 2014, Vol. 53, p. 17098-17111
Resumo: This paper addresses a multistage batch plant scheduling problem under energy constraints. These reflect the limited availability of a thermal heating utility that is shared among parallel digesters of different capacities for the production of pulp. Depending on the processing sequence, more or less steam will be available for a given digester, which will affect the duration of its heating stage and the overall cycle time. Such integrated heating tasks resemble direct heat integration, which has been addressed through models based on generic frameworks for process representation (e.g., State-Task Network, Resource-Task Network, State-Sequence Network) and relying on a single time grid, either discrete or continuous. A new multiple time grid continuous-time model is now proposed where the complex energy constraints are derived from the higher level modeling framework that is Generalized Disjunctive Programming. The results show a considerable better performance compared to RTN discrete and continuous-time formulations, due to a substantially lower integrality gap and model size.
URI: http://hdl.handle.net/10400.9/2577
ISSN: 0888-5885
Versão do Editor: http://dx.doi.org/10.1021/ie403822z
Aparece nas colecções:UAER - Artigos em revistas internacionais

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