August 28 - September 2, 2011, Milano, Italy

IFAC WC 2011 Paper Abstract


Paper WeA13.3

Ghasemi Afshar, Puya (The University of Manchester), Brown, Martin (The University of Manchester), Maciejowski, Jan (University of Cambridge), Wang, Hong (the University of Manchester)

Product Scheduling for Thermal Energy Reduction in Papermakig Industries

Scheduled for presentation during the Regular Session "Scheduling I" (WeA13), Wednesday, August 31, 2011, 10:40−11:00, Card. Ferrari

18th IFAC World Congress, August 28 - September 2, 2011, Milano, Italy

This information is tentative and subject to change. Compiled on February 26, 2015

Keywords Job and activity scheduling, Production planning and control, Decision support systems in manufacturing


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 (paper grades) which impose variable per-unit raw material and energy costs to the mill. It is also 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. It is known that 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 paper 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.



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