SIMULTANEOUS SYNTHESIS, SIZING, AND SCHEDULING OF MULTIPRODUCT BATCH PLANTS

The procedure for synthesis, sizing, an scheduling of multiproduct batch plants can be summarized as follows: Step 1. Based on the given problem data, add to the initial unit list superunits that account for all possible mergings of tasks as described in the section on representation of alternatives. Step 2. Formulate the MINLP corresponding to the selected scheduling policy and to the option for parallel equipment (MINLP1, MINLP2, or MINLP3): 1. Solve the MINLP. 2. Round off the number of batches obtained in the solution to the lower integer and solve the corresponding NLP for the plant structure obtained from the MINLP. Step 3. Using the values obtained for the variables NPRSikin the MINLP solution, derive the schedule that enables the required amount of products to be manufactured in the new plant in the given horizon time. The schedule is derived by using the graph representation and algorithm developed by Birewar and Grossmann (1989b). © 1990, American Chemical Society. All rights reserved.