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Simultaneous optimization of flow velocity and cleaning schedule for mitigating fouling in refinery heat exchanger networks

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  • Tian, Jiayang
  • Wang, Yufei
  • Feng, Xiao

Abstract

Fouling is a crucial problem in refinery HEN (heat exchanger network) that reduces heat transfer and affects regular production. The conventional way to mitigate fouling is cleaning heat exchanger regularly or improving operation conditions, but simultaneous consideration of the two methods is rare. This paper presents a combined approach for mitigating fouling in HEN by optimizing operation condition and cleaning schedule simultaneously. For optimization of operation condition, flow velocity is selected as a key variable since it can correlate fouling, heat transfer and pressure drop. An overall optimization of network performance can be achieved through redistribution of velocity. In a refinery HEN, fouling cannot be completely prevented through optimization of operation conditions, so management of cleaning actions is optimized to deal with the remained fouling. SA (Simulated annealing) algorithm is used in this work to obtain a comprehensive strategy for mitigating fouling. The application of the proposed method is demonstrated using a case study. The results show higher energy saving and economic efficiency compared with existing methods.

Suggested Citation

  • Tian, Jiayang & Wang, Yufei & Feng, Xiao, 2016. "Simultaneous optimization of flow velocity and cleaning schedule for mitigating fouling in refinery heat exchanger networks," Energy, Elsevier, vol. 109(C), pages 1118-1129.
    • Handle: RePEc:eee:energy:v:109:y:2016:i:c:p:1118-1129
    DOI: 10.1016/j.energy.2016.05.053
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    Cited by:

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    2. Li, Nianqi & Klemeš, Jiří Jaromír & Sunden, Bengt & Wu, Zan & Wang, Qiuwang & Zeng, Min, 2022. "Heat exchanger network synthesis considering detailed thermal-hydraulic performance: Methods and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
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    6. Trafczynski, Marian & Markowski, Mariusz & Urbaniec, Krzysztof, 2023. "Energy saving and pollution reduction through optimal scheduling of cleaning actions in a heat exchanger network," Renewable and Sustainable Energy Reviews, Elsevier, vol. 173(C).
    7. Ren, Chao & Wang, Kai & Han, Jie & Sun, Lin & Yang, Chunhua, 2024. "Deterministic scenarios guided K-Adaptability in multistage robust optimization for energy management and cleaning scheduling of heat transfer process," Energy, Elsevier, vol. 312(C).
    8. Luo, Lei & Du, Wei & Wang, Songtao & Wang, Lei & Sundén, Bengt & Zhang, Xinhong, 2017. "Multi-objective optimization of a solar receiver considering both the dimple/protrusion depth and delta-winglet vortex generators," Energy, Elsevier, vol. 137(C), pages 1-19.

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