Heat exchanger networks in real industrial processes often have to be designed for varying parameters of the process streams that renders multiperiod heat exchanger network synthesis essential in industrial realization. However, three standing issues must be considered in the synthesis procedure. (1) The generated network should be efficient in all periods, preferably consuming minimum utility. (2) This network should also be structurally as simple as possible for minimizing the investment cost and making the process controllable. Furthermore, (3) all or the n-best networks that fulfilled the first two principles must be considered for the selection of the most preferred industrial realization. The method proposed in the current work satisfies all three requirements simultaneously; it has been the only known method with these properties. The method primarily relies on the formerly developed P-graph-based heat exchanger network synthesis procedure. Three case studies demonstrate the application of the proposed method.

实际工业过程中的热交换器网络通常必须针对工艺流的变化参数进行设计，这使得多周期热交换器网络合成在工业实现中必不可少。然而，在合成过程中必须考虑三个长期存在的问题。(1) 生成的网络应该在所有时期都是有效的，最好是消耗最小效用。(2)该网络还应在结构上尽可能简单，以最小化投资成本并使过程可控。此外，（3）必须考虑满足前两个原则的所有或 n 最佳网络，以选择最优选的工业实现。当前工作中提出的方法同时满足所有三个要求；它是唯一具有这些特性的已知方法。该方法主要依赖于以前开发的基于 P 图的热交换器网络合成程序。三个案例研究证明了所提出方法的应用。