|
|
The process electricity consumption, shown in Figure 6, ranged from 1220 to 3660 kWh/ADt. The variation in electricity consumption is due in part to variations in recycled fibre content and TMP refining energy. The average electricity consumption was 2850 kWh/ADt. Most mills used more electricity than predicted for the modern TMP/DIP newsprint mill, 2430 kWh/ADt. However, most of the electricity used in a TMP/DIP newsprint mill is used for TMP refining. Thus, much of the higher energy input is likely attributable to the wood species employed and the grade of paper produced. Changes in pumping and agitation throughout the mill may result in a 5 percent overall drop in electricity consumption, or a potential savings of about $5.70/ADt.
|