ABB already offers a solution for optimizing the energy portfolio for a given production plan: cpmPlus Energy Manager has been available for more than a decade and covers energy conversion (eg, fuel to energy), purchasing from various markets and also some production planning decisions – especially for continuous processes. The solution has been installed by many types of customers – including pulp and paper, metals and mining – as a part of ABB’s collaborative production management (CPM) solution and has demonstrated significant benefits.
The following graph shows Energy Manager solution for a thermomechanical pulp (TMP) mill, with the production lines displayed in the upper diagram and the fiber storage tank level in the middle diagram. A mathematical optimization is used to simultaneously consider all energy-consuming and energy-producing units together with the option of purchasing from or selling the energy to the grid based on current prices. The electricity consumption of the three TMP lines is shown in the bar graph in the lower part of the graph and the varying electricity price is indicated by the yellow line.
This example illustrates how a CPM solution can collect and connect information from various sources and generate the most cost-efficient production strategies, while also taking into account electricity costs. As the solution also includes other production units, it decides when to run which production line, taking into account, for example, total downstream steam demand, the capacity and cost of alternative steam sources, the production plan of the paper machines, and the minimum and maximum production limits of each refiner line.