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Minimisation of a heat exchanger networks' cost over its lifetime

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  • Nemet, Andreja
  • Klemeš, Jiří Jaromír
  • Kravanja, Zdravko

Abstract

The optimal design of heat exchanger networks (HENs) has a great influence on the profitability of a plant. The optimisation is based on trade-offs between investment and operational cost. The full lifetime of the HEN and future utility prices have to be considered rather than optimising HEN on a yearly basis using current utility prices. Single-period optimisation and synthesis models for HENs reflect current utility prices only. These prices can fluctuate rather quickly and the optimal solution may be very different from a year to year. Deterministic and stochastic multi-period mixed-integer nonlinear programming (MINLP) models for HEN synthesis have been developed to account for future price projections, where the utility cost coefficients are forecasted for the lifetime of the process. An optimal design is then determined for each projection and these designs are compared against a design with fixed current prices by applying the Incremental Net Present Value and other economic measures. In case studies the difference between utility consumption, using previous optimisation methods and new, were significant; e.g. in Case Study 2 the utility savings were 18.4% for hot and 32.6% for cold utility yielding an increase of the Net Present Value (NPV) by 7.8%.

Suggested Citation

  • Nemet, Andreja & Klemeš, Jiří Jaromír & Kravanja, Zdravko, 2012. "Minimisation of a heat exchanger networks' cost over its lifetime," Energy, Elsevier, vol. 45(1), pages 264-276.
    • Handle: RePEc:eee:energy:v:45:y:2012:i:1:p:264-276
    DOI: 10.1016/j.energy.2012.02.049
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    References listed on IDEAS

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    1. Soltani, Hadi & Shafiei, Sirous, 2011. "Heat exchanger networks retrofit with considering pressure drop by coupling genetic algorithm with LP (linear programming) and ILP (integer linear programming) methods," Energy, Elsevier, vol. 36(5), pages 2381-2391.
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    Cited by:

    1. Kang, Lixia & Liu, Yongzhong & Wu, Le, 2016. "Synthesis of multi-period heat exchanger networks based on features of sub-period durations," Energy, Elsevier, vol. 116(P2), pages 1302-1311.
    2. Nemet, Andreja & Klemeš, Jiří Jaromír & Kravanja, Zdravko, 2013. "Optimising entire lifetime economy of heat exchanger networks," Energy, Elsevier, vol. 57(C), pages 222-235.
    3. Huang, Kefeng & Karimi, I.A., 2016. "Work-heat exchanger network synthesis (WHENS)," Energy, Elsevier, vol. 113(C), pages 1006-1017.
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    6. 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).
    7. Pavão, Leandro V. & Pozo, Carlos & Costa, Caliane B.B. & Ravagnani, Mauro A.S.S. & Jiménez, Laureano, 2017. "Financial risks management of heat exchanger networks under uncertain utility costs via multi-objective optimization," Energy, Elsevier, vol. 139(C), pages 98-117.
    8. Chang, Chenglin & Chen, Xiaolu & Wang, Yufei & Feng, Xiao, 2017. "Simultaneous optimization of multi-plant heat integration using intermediate fluid circles," Energy, Elsevier, vol. 121(C), pages 306-317.
    9. Dizaji, Hamed Sadighi & Pourhedayat, Samira & Aldawi, Fayez & Moria, Hazim & Anqi, Ali E. & Jarad, Fahd, 2022. "Proposing an innovative and explicit economic criterion for all passive heat transfer enhancement techniques of heat exchangers," Energy, Elsevier, vol. 239(PC).
    10. Daróczy, László & Janiga, Gábor & Thévenin, Dominique, 2014. "Systematic analysis of the heat exchanger arrangement problem using multi-objective genetic optimization," Energy, Elsevier, vol. 65(C), pages 364-373.
    11. Zhang, B.J. & Li, J. & Zhang, Z.L. & Wang, K. & Chen, Q.L., 2016. "Simultaneous design of heat exchanger network for heat integration using hot direct discharges/feeds between process plants," Energy, Elsevier, vol. 109(C), pages 400-411.
    12. Bohong Wang & Jiří Jaromír Klemeš & Petar Sabev Varbanov & Min Zeng, 2020. "An Extended Grid Diagram for Heat Exchanger Network Retrofit Considering Heat Exchanger Types," Energies, MDPI, vol. 13(10), pages 1-14, May.

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