(339d) Optimization of the Operation of Integrated, Multi-Plant Systems
AIChE Annual Meeting
Tuesday, November 12, 2019 - 1:33pm to 1:54pm
Optimization of integrated multi-plant systems is not new. In industry, it has traditionally been carried out using linear models, which greatly facilitates the solution of the underlying mathematical problem. However, this often results in solutions that actually fail to satisfy basic plant operability constraints. To some extent, this can be avoided by applying safety margins to various constraints and/or restricting the allowable range of variation of the decision variables. However, given the typical size of the money flows in these systems, the resulting sub-optimality of the solutions obtained often corresponds to significant loss of economic opportunity.
In this paper, we present a general framework for the optimization of multi-plant systems aiming to address the characteristics and requirements of real industrial applications. Aiming to exploit the increasing availability of detailed physics-based models for individual plants, the proposed framework combines these detailed models with simpler (surrogate) models derived automatically from them.