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Synthesis of flexible inter-plant heat exchanger networks: A decomposition method considering intermedium fluid circles

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第11期75卷 62-73页

作者： Tao, Ran Gu, Siwen Liu, Linlin Du, Jian Dalian Univ Technol Sch Chem Engn Inst Proc Syst Engn Dalian 116023 Peoples R China Changzhou Inst Technol Sch Photoelect Engn Changzhou 213032 Peoples R China

The traditional methods for synthesizing flexible heat exchanger networks (HENs) are not directly applicable to inter-plant HEN challenges, primarily due to the spread of system uncertainty across plants via intermedium fluid circles. This complicates the synthesis process significantly. To tackle this issue, this study proposes a decomposed stepwise methodology to facilitate the flexible synthesis of the interplant HENs performing indirect heat integration. A decomposition strategy is proposed to divide the overall network into manageable sub-networks by dissecting the intermedium fluid circles. To address the variability in intermedium fluid temperatures, a temperature fluctuation analysis approach is developed and a heuristic rule is introduced to maintain the temperature feasibility of the intermedium fluids. To ensure adequate flexibility and cost-effectiveness of the designed networks, flexibility analysis and network retrofit steps are conducted through model-based optimization techniques. The efficacy of the method is demonstrated through two case studies, showing its potential in achieving the desired operational flexibility for inter-plant HENs. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Inter-plant heat exchanger networks (HENs) indirect heat integration Flexible synthesis Flexible analysis Decomposition method

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