Product scheduling for thermal energy reduction in papermaking industries

Puya Afshar, Martin Brown, Hong Wang, Jan MacIejowski

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Papermaking is considered as an energy-intensive industry partly due to the fact that the machinery and procedures have been designed at the time when energy was both cheap and plentiful. A typical paper machine manufactures a variety of different products (grades) which impose variable per-unit raw material and energy costs to the mill. It is known that during a grade change operation the products are not market-worthy. Therefore, two different production regimes, i.e. steady state and grade transition can be recognised in papermaking practice. Among the costs associated with paper manufacture, the energy cost is 'more variable' due to (usually) day-to-day variations of the energy prices. Moreover, the production of a grade is often constrained by customer delivery time requirements. Given the above constraints and production modes, the product scheduling technique proposed in this paper aims at optimising the sequence of orders in a single machine so that the cost of production (mainly determined by the energy) is minimised. Simulation results obtained from a commercial board machine in the UK confirm the effectiveness of the proposed method. © 2011 IFAC.
    Original languageEnglish
    Title of host publicationIFAC Proceedings Volumes (IFAC-PapersOnline)|IFAC Proc. Vol. (IFAC-PapersOnline)
    Pages6957-6962
    Number of pages5
    Volume18
    DOIs
    Publication statusPublished - 2011
    Event18th IFAC World Congress - Milan, Italy
    Duration: 28 Aug 20112 Sept 2011

    Conference

    Conference18th IFAC World Congress
    CityMilan, Italy
    Period28/08/112/09/11

    Keywords

    • Energy reduction
    • Optimisation
    • Paper machine
    • Single machine scheduling

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