CASE: ENERGY
OPTIMIZATION
As part of a larger optimization system, a major
paper producer
requested assistance with energy management issues. In addition
to meeting the steam and electricity demands of the pulp and paper operations,
there were additional complexities including the consideration of:
The model resulting from this effort can be run as
part of the overall pulp and paper model, in which case the mill must be
supplied with electricity and steams of various pressures, or as a standalone
tool where the energy needs are fixed. In both cases the model generates the
least-cost means of generating the required energy demand.
The energy model allowed the company to back away
from the details of day-to-day energy management and to plan energy strategies
and tactics in advance. In addition, the model proved useful for responding in
the lowest-cost way to extended equipment shut-downs in both the energy
generation system and in the paper mill.
Due to validated results, management had high
confidence in using the model to lower energy costs, and to deal with
equipment disruptions and sudden changes in fuel or electricity prices.
