Targeting and Design of Work and Heat Exchange Networks,Industrial & Engineering Chemistry Research

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Targeting and Design of Work and Heat Exchange Networks
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-05-06 , DOI: 10.1021/acs.iecr.0c00308
Qucheng Lin ₁ , Zuwei Liao ₂ , Jingyuan Sun ₁ , Binbo Jiang ₁ , Jingdai Wang ₂ , Yongrong Yang ₂

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Work and heat are the two major forms of energy consumption in the process industry. They are respectively consumed in the work exchange and heat exchange networks. Because of the tight interactions between these two networks, a growing number of researchers tend to consider them as a whole: work and heat exchange networks (WHENs). However, this is a complicated system that includes not only pressure manipulation units but also heat exchangers. To synthesize such a complicated system, we propose a two-phase strategy: targeting and design. In the targeting phase, the optimal thermodynamic paths of process streams are determined by optimizing the utility consumption and estimated capital investments. To represent possible thermodynamic paths of unclassified process streams, we propose a novel stage-wise superstructure where the utility consumption and heat exchanger area of the HEN part are estimated by an extended pinch analysis method under the assumption of vertical heat transfer. With obtained thermodynamic paths, the HEN synthesis problem in the design phase is carried out by the well-known stage-wise superstructure (SWS) model. Two literature examples are presented to illustrate the effectiveness and applicability of the proposed method. In two case studies, our approach yields WHENs with 30.7 and 28.3% lower total annual cost, respectively.

中文翻译：

工作和热交换网络的目标设计

功和热是过程工业中能耗的两种主要形式。它们分别在工作交换和热交换网络中消耗。由于这两个网络之间紧密的相互作用，越来越多的研究人员倾向于将它们作为一个整体来考虑：工作和热交换网络（WHEN）。但是，这是一个复杂的系统，不仅包括压力操纵单元，还包括热交换器。为了合成这样一个复杂的系统，我们提出了两个阶段的策略：目标和设计。在目标阶段，通过优化公用事业消耗和估算的资本投资来确定工艺流的最佳热力学路径。为了表示未分类过程流的可能热力学路径，我们提出了一种新颖的分阶段上层建筑，其中在垂直传热的假设下，通过扩展的夹点分析方法估算了HEN部分的公用事业消耗量和热交换器面积。在获得热力学路径的情况下，设计阶段的HEN合成问题是通过众所周知的阶段式上层建筑（SWS）模型进行的。提出了两个文献实例来说明所提方法的有效性和适用性。在两个案例研究中，我们的方法产生的WHEN分别使年度总成本降低了30.7％和28.3％。设计阶段的HEN综合问题是通过众所周知的阶段式上层建筑（SWS）模型进行的。提出了两个文献实例来说明所提方法的有效性和适用性。在两个案例研究中，我们的方法产生的WHEN分别使年度总成本降低了30.7％和28.3％。设计阶段的HEN综合问题是通过众所周知的阶段式上层建筑（SWS）模型进行的。提出了两个文献实例来说明所提方法的有效性和适用性。在两个案例研究中，我们的方法产生的WHEN分别使年度总成本降低了30.7％和28.3％。

更新日期：2020-07-08

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