Design of distribution manifolds with operational constraints
The scheduling of two types of distribution manifolds (single and double seat valves) typically found in multipurpose facilities has recently been presented by Amaro and Barbosa-Povoa (1998). The mathematical formulation proposed permits a detailed consideration of the scheduling problem where important aspects such as operational pre-conditions and constraints are considered. In this paper, this model is extended to address the design of distribution manifolds. Scheduling and structural aspects are considered within a single level problem formulation. Operational constraints and simultaneous operation of compatible flowpaths, with different transfer times, are accounted for. All problems are formulated as MILPs and solved using a Branch and Bound procedure. An example illustrating the flexibility and the applicability of the new formulation to the design of distribution manifolds is presented. (C) 1999 Elsevier Science Ltd. All rights resented.
design distribution manifolds scheduling operational pre-conditions milp