Synthesis of Optimal Energy Exchange Networks Using Discrete Methods

Abstract

<p>A flexible, modular program system for the synthesis of optimal energy exchange networks (OPENS) is developed. It is capable of generating realistic process equipment networks to satisfy both stream temperature and pressure specifications. The system contains elements of heuristic decision making and employs a "branch and bound" combinatorial technique for solving the discrete problem of optimizing network configuration. An (energy) price-based decomposition algorithm is developed for sub-process integration; this is achieved by determination of the optimal (stream) interconnections between such sub-processes .</p> <p>The system is applied to the design of energy recovery networks for two quite dissimilar ethylene recovery schemes; the high and low pressure processes. Process interactions between the main processing sequence and the associated refrigeration facility are used to explore sub-process integration.</p> <p>Some conclusions are made regarding the effectiveness of the program system for the example processes presented and recommendations are made for improvement and extensions .</p>