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An extended energy saving method for modification of MTP process heat exchanger network

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  • Sadeghian Jahromi, Farid
  • Beheshti, Masoud

Abstract

Pinch Technology has been widely adopted and considered to be one of the most successful techniques in process energy integration. But according to limitation and defect of pinch analysis in heat exchanger retrofit, a new conceptual diagram is proposed for super-ambient and sub-ambient temperature process. This diagram is based on heat flow rate as a function of temperature. By using this diagram, it can be achieve to the concepts such as: 1- retrofit of the HEN for energy saving, 2- the best location of hot and cold utility, 3- The actual amount of required hot and cold utility. Composite curve, the grand composite curve and the energy transfer diagram have been constructed for analysis of the HEN of a methanol to propylene plant. In this novel design it was attempted to improve the HEN’s efficiency of MTP process and get the maximum economic return. Annual profit percentage reach to 13.2% by improving HEN via bridge method. Results showed that utilities consumption have been decreased significantly in the novel design by bridge method (about 9.3%) to pinch analysis (5.0%). Finally, it can be said, bridge analysis provides more detail about heat savings modifications, than traditional pinch analysis.

Suggested Citation

  • Sadeghian Jahromi, Farid & Beheshti, Masoud, 2017. "An extended energy saving method for modification of MTP process heat exchanger network," Energy, Elsevier, vol. 140(P1), pages 1059-1073.
    • Handle: RePEc:eee:energy:v:140:y:2017:i:p1:p:1059-1073
    DOI: 10.1016/j.energy.2017.09.032
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    References listed on IDEAS

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    Cited by:

    1. Zhu, Xiaochen & Fuli, Wang, 2023. "Energy savings bottleneck diagnosis and optimization decision method for industrial auxiliary system based on energy efficiency gap analysis," Energy, Elsevier, vol. 263(PE).
    2. Lai, Yee Qing & Wan Alwi, Sharifah Rafidah & Manan, Zainuddin Abdul, 2019. "Customised retrofit of heat exchanger network combining area distribution and targeted investment," Energy, Elsevier, vol. 179(C), pages 1054-1066.
    3. Subin Jung & Hyojin Jung & Yuchan Ahn, 2022. "Optimal Economic–Environmental Design of Heat Exchanger Network in Naphtha Cracking Center Considering Fuel Type and CO 2 Emissions," Energies, MDPI, vol. 15(24), pages 1-14, December.
    4. Lal, Nathan S. & Walmsley, Timothy G. & Walmsley, Michael R.W. & Atkins, Martin J. & Neale, James R., 2018. "A novel Heat Exchanger Network Bridge Retrofit method using the Modified Energy Transfer Diagram," Energy, Elsevier, vol. 155(C), pages 190-204.
    5. Wang, Bohong & Klemeš, Jiří Jaromír & Li, Nianqi & Zeng, Min & Varbanov, Petar Sabev & Liang, Yongtu, 2021. "Heat exchanger network retrofit with heat exchanger and material type selection: A review and a novel method," Renewable and Sustainable Energy Reviews, Elsevier, vol. 138(C).

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