Abstract The synthesis of multiperiod heat exchanger networks (HEN) is a well-studied topic in heat integration. Several methods for identifying heat exchanger network designs that are able to feasibly operate under multiple conditions have been presented. Multiperiod models are certainly a notable form of achieving such resilient designs. In work and heat integration, however, solutions presented so far are for nominal conditions only. This work presents a step-wise optimization-based multiperiod work and heat exchange network synthesis framework. Hybrid meta-heuristic methods are used in the optimization steps. The methodology is able to obtain work and heat exchanger networks (WHENs) that are able to operate under multiple known scenarios. A set of critical conditions for stream properties in work integration is proposed. When these scenarios are modeled as finite operating periods (which are here referred to as non-nominal periods), a WHEN which can feasibly operate under nominal and critical conditions can be obtained. An example is tackled in two cases: the first, with one nominal and six critical, non-nominal periods; the second with two nominal and twelve non-nominal periods. Note that with that number of periods, the problem is considerably more complex than in multiperiod HEN synthesis (which usually comprises three or four periods). Solutions obtained with the present method are compared to those obtaining by simply merging single-period solutions obtained for each period individually. Capital investments are 30.2% and 58.2% lower in Cases 1 and 2 than in straightforwardly merged solutions. The capacity utilization parameters also demonstrate that the overdesign issue is notably reduced in these solutions.

中文翻译：

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多周期功热一体化

摘要 多周期换热器网络 (HEN) 的综合是热集成中一个经过充分研究的课题。已经提出了几种用于识别能够在多种条件下可行运行的换热器网络设计的方法。多周期模型无疑是实现这种弹性设计的一种显着形式。然而，在功和热集成中，迄今为止提出的解决方案仅适用于标称条件。这项工作提出了一个基于逐步优化的多周期工作和热交换网络综合框架。在优化步骤中使用混合元启发式方法。该方法能够获得能够在多个已知场景下运行的功和换热器网络 (WHEN)。提出了工作集成中流属性的一组临界条件。当这些场景被建模为有限运行周期（这里称为非标称周期）时，可以获得可以在标称和临界条件下可行运行的 WHEN。一个例子在两种情况下处理：第一种，有一个名义和六个关键的非名义时期；第二个有两个名义周期和十二个非名义周期。请注意，由于周期数如此多，问题比多周期 HEN 综合（通常包含三个或四个周期）复杂得多。将用本方法获得的解与通过简单地合并单独为每个时期获得的单时期解获得的解进行比较。案例 1 和案例 2 的资本投资比直接合并的解决方案低 30.2% 和 58.2%。