过程综合的混合整数非线性规划嵌套式求解方法-系统工程专业论文.docxVIP

浙江大学蹦士学位论文 浙江大学蹦士学位论文 Abstract ηle efficient solving method of mixed-integer nonlinear programming (MINLP) is of gre础 impo此m∞to the process synthesis. Studies upon MINLP solving method for process synthesis areωnducted in 出is 阴阳凯 ηle main ωntributions are summarized as follows: (1)A 伽ree layers nest创 method is proposed for 阳阴阳truc阳re b部时 MINLP in process syn由esis (PS). It ∞mbines bo出 the merits of heuristic methods and deterministic algorithms. Morωver，an adaptive model reformulation mech缸山:m is proposed based on the specia1 characteristics of MINLP in process synthesis. Heuristic methods，such as tabu search (T时， genetic a1gorithm (GA)，and simulated annealing (SA) dea1 with the integer v，盯iables M 曲。 outer loop. Given the integer variables by the outer loop，the original MINLP degrades to a NLP，which is furth町 solved by det臼ministic methods， like SQP. But before delivering the outer loop result into the inner loop，an adaptive model reformulation mechamismn is proposed to automatical1y ameliorate the NLP model by removing its redundance. This adaptive model reformulation module，based on the mechanism of process syn伽邸， bridgω the inner and out町 loops and greatly improves the global optimality of the method. Applications of the nested method ωheat exchang町 network synthesis (HENS) are conducted. The results have demons位ated this method is efficiency for HENS. A superstructure-based MINLP model is proposed for water network synthesis (WNS). The model combines w创er using processes and wat町 treatment operations into a single network.ηlis model is universa1， and e削Y to expand with 阳 least number of continuous variables. Good p时formande of the nested method appli叫to WNS is also achieved. Keywords: 郎， superstruc阳re，MINLP，nested method，adaptive model reformulation， HEN，WN. -v- 浙江大学硕士学位论文 浙江大学硕士学位论文 第1章绪论 1.1 过程综合中的混合整数非线性规划模型 1.1.1 过程综合问题 过程综合作为过程系统工程的一个重要的研究领域，在过去 40 年吸引了大 量的学术研究和工业界的关注。它起源于上世纪 60年代，由 Rudd (1968)首先提 出这个概念，并开始应用于简单的换热网络设计。开始只是凭借设计人员的经验 来