Abstract
A case study is presented of a closed-loop control system installed and running at a Pulp and Paper facility in the southeast. A fuzzy logic, ruled-based control system optimally loads multiple steam turbines for maximum electrical generation, while providing steam to the process. A Sell Advisor calculates Make-Buy decisions based on real-time electrical prices, fuel prices and boiler loads. Condensing turbines are coordinated with closed-loop control to provide the lowest energy cost to the plant. When economical, additional electrical generation is achieved by venting low-pressure steam. By manipulating turbine loads, boilers are pushed to optimal loading through process coupling. Multi-variable control strategies push process envelopes to constraints.
Childress, R. L. (2002). Closed-Loop Energy Management Control of Large Industrial Facilities. Energy Systems Laboratory (http://esl.tamu.edu). Available electronically from
https : / /hdl .handle .net /1969 .1 /90954.