Superstructure-Based MINLP Formulation for Synthesis of Re-Circulating Cooling-Water Networks with Intermediate Mains

摘要

A novel superstructure-based MINLP formulation is proposed for the synthesis of cooling water networks with intermediate mains.The proposed mathematical model considers the generic problem confronted in the design of a recirculating cooling-water system,including stretching the cooler network design and setting the operation constraints.Besides the original design items,this research probes into how the number of intermediate cooling-water mains influences the performance of a recirculating cooling-water system.We also study how the conditional direct connections between cooling units can decrease the consumption of the recirculating cooling-water with a little sacrifice of pipeline complexity.Typical representative examples are presented to demonstrate the viability of proposed superstructure-based MINLP formulation.Supported by the results of computer analysis,the network superstructure and its design scheme can effectively accomplish the goal of unraveling the design problem of the recirculating cooling-water system with intermediate cooling-water mains,and proffering the optimal structure in designing the recirculating cooling-water systems.