Synthesis of Water Network with Heat Integrationby Mathematical Programming Approach

• Main Authors: Hui-Liang Liao, 廖輝亮
• Other Authors: Cheng-Liang Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/58812718089177425173

碩士 === 國立臺灣大學 === 化學工程學研究所 === 95 === In this study, a mathematical programming approach for synthesis of water network with energy integration in chemical plants is developed.This approach considers simultaneously the optimal water networks to satisfy demands of water-using unit and optimal treatment of effluent streams. Concept of regeneration reuse and regeneration recycling water networks with heat integration is explained and distinguished in this method. The superstructure-based mathematical programming approach, which includes many practical operating constraints, flowrate limitations of water supply, operating costs, treatment costs, utility costs, and total annualized cost (TAC), will result in a mixed-integer nonlinear programming problem (MINLP) for synthesis of water network with energy integration. Complex trade-off involving optimal water networks design structure, as well as design costs has been included in this MINLP problem. Therefore, different objections is presented for using sequential design in this study, and there are analytic comparisons between water-using network with heat integration designs for optimal water supply flowrates, optimal utility cost and optimal total annual cost. Furthermore, three water-using processes having different design objectives are used to demonstrate this approach. Finally, some examples from literature are employed to demonstrate the applicability of the proposed strategy and discuss their advantages.