大規模熱交換器網路設計之研究

Abstract

本研究針對大規模的熱交換器網路設計提出一個分段完成的設計策略，並且考慮到多種且不固定位置之公用能源的使用。這個設計策略分成以下四個步驟： 1.先利用簡單的線性模式對所有程序 流體進行初步的配對； 2.再使用混合整數線性模式將第一步驟中不經濟的配對刪除； 3.將剩下的配對利用一個混合整數非線性模式區分成數個子群； 4.最後使用混合整數非線性模式對每個子群做各別的設計，再把每個子群的設計結果加總起來。 經由上述四個步驟，我們即可設計出大規模的熱交換器網路；不過，因為這是一個分段的設計策略，所以得到的解不能說是最好，但至少提供我們一個設計的方向。 在本論文最後，利用提出的設計策略對兩個範例進行設計， 用以應證其可行性，並且討論其優缺點。

This thesis proposes a sequential design strategy for synthesis of large scale heat exchanger networks.The use of multiple utility at non-fixed position is considered.This strategy steps are:(1)process stream was matched roughly by using a simple linear model;(2)non-economic matches were removed form results of step1;(3)the surplus matches were decomposed into several subgroup;(4)each subgroup was designed individually by MINLP model and sum up result of subgroup.By the sequential strategy, we can design a large scale heat exchanger network.Though the sequential method can't guarantee obtaining solution, it is found that this proposed method can provide us acceptable results for large-scale HEN design problem. Finally, two examples from literature are employed to demonstrate the applicability of the proposed strategy and discuss their advantage.