Data-based analysis of energy system in papermaking process

ABSTRACTPapermaking process is highly energy intensive, complicated and influenced by multiple unit processes, which plays an important role in the energy consumption, especially of thermal energy and electricity energy. An Energy Management System (EMS) was built to acquire the systematic, consistent, and accurate on-line information of the production process in a typical coated paperboard mill. The EMS first fulfilled the on-line energy information calculation from the process data acquisition and integration, second provided the massive historical data to find out the internal variation of production process for inferring decisions. In a case study, the on-line energy flow analysis and the estimation of specific energy consumption (SEC) were carried out. Based on data-driven techniques, three different operation conditions were recognized by adopting the kernel PCA and DBSCAN algorithm when the basis weight was 220 g/m2. The energy consumption was described in each cluster. Particular attention needed ...