1. Page: 1| October 09| © ProcessIT Innovations | LTU - UmU | Optimizing of energy balances and simulation of primary & secondary heat systems in pulp and paper mills

2. Page: 2| October 09| © ProcessIT Innovations | LTU - UmU | An integrated P&P mill consumes 2-3 TWh/year It’s very complicated to manage the energy balances in the mills in a way that both capacity and costs are optimised The energy systems in a mill is divided into a primary and a secondary heat system – The primary heat system is the main energy system used in the production process and is steam – The secondary heat system is a water borne system that collects heat from different subprocesses, often by cooling various process flows or condensate gases.

3. Page: 3| October 09| © ProcessIT Innovations | LTU - UmU | Create a cohesive simulation of the primary & secondary heat systems The result from the simualtion will be used to create a decision support for operators & production mangement making it possible to – Optimize the energy consumption based on the actual production plan – Optimize the energy production in the turbine (-s) based on current electricity price, prices on green certificates, bio- and fuel oil prices, the production plan and the energy balance in the mill – Plan and evaluate different options in conjunction with rebuild of process areas in the mill and evaluate the best alternative from energy- och environmental aspects

4. Page: 4| October 09| © ProcessIT Innovations | LTU - UmU | The simulation will be built on componets used in the mill and gathered in a component library The componets shall be both easy to adapt to the mills specific situation and easy to connect to each other (by e.g. process engineers in the mill)

5. Page: 5| October 09| © ProcessIT Innovations | LTU - UmU | Umea university Phone +46 70 595 40 03 anders.jonsson@cs.umu.se