This work addresses the scheduling of continuous plants subject to energy constraints related to time-dependent electricity pricing and availability. A Resource-Task Network continuous-time formulation is presented that can address these issues together with multiple intermediate due dates. To the best of our knowledge, it is the first model of its type that is able to effectively incorporate time-variable utility profiles. The validity of the approach is illustrated through the solution of a few example problems. When compared to a simple manual scheduling procedure, significant electricity savings can be achieved by switching production from periods of high to low electricity cost.
- Continuous-time formulation
- Decision-making tool