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Optimization of the boiler start-up taking into account thermal stresses

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  • Taler, Jan
  • Dzierwa, Piotr
  • Taler, Dawid
  • Harchut, Piotr

Abstract

The objective of the paper is a proposal of a quick start of the steam boiler from the cold state. Fuel consumption rate necessary for heating the evaporator from initial temperature to a predetermined temperature was determined using a transient mathematical model of the boiler evaporator developed in the paper. The model takes into account that at the beginning of the evaporator water is heated without steam generation and then after reaching the saturation temperature the boiling process is started and steam is produced. The mathematical model of the evaporator was verified experimentally. Heating of the evaporator is carried out with a maximum temperature change rate due to the maximum circumferential stress occurring at the edge of the drum–downcomer junction. After determining the optimum fluid temperature the pressure can easily be determined because the pressure of the saturated steam is a function of temperature. Using mathematical models of the evaporator and the combustion chamber the mass flow rate of the fuel ensuring optimum drum heating was calculated. The mass of heavy oil consumed during optimum warm-up of the drum was also calculated.

Suggested Citation

  • Taler, Jan & Dzierwa, Piotr & Taler, Dawid & Harchut, Piotr, 2015. "Optimization of the boiler start-up taking into account thermal stresses," Energy, Elsevier, vol. 92(P1), pages 160-170.
    • Handle: RePEc:eee:energy:v:92:y:2015:i:p1:p:160-170
    DOI: 10.1016/j.energy.2015.03.095
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    References listed on IDEAS

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    1. Alobaid, Falah & Karner, Karl & Belz, Jörg & Epple, Bernd & Kim, Hyun-Gee, 2014. "Numerical and experimental study of a heat recovery steam generator during start-up procedure," Energy, Elsevier, vol. 64(C), pages 1057-1070.
    2. Krüger, Klaus & Franke, Rüdiger & Rode, Manfred, 2004. "Optimization of boiler start-up using a nonlinear boiler model and hard constraints," Energy, Elsevier, vol. 29(12), pages 2239-2251.
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    Citations

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    Cited by:

    1. Zhang, Hengliang & Xie, Danmei & Yu, Yanzhi & Yu, Liangying, 2016. "Online optimal control schemes of inlet steam temperature during startup of steam turbines considering low cycle fatigue," Energy, Elsevier, vol. 117(P1), pages 105-115.
    2. Trojan, Marcin & Taler, Dawid & Dzierwa, Piotr & Taler, Jan & Kaczmarski, Karol & Wrona, Jan, 2019. "The use of pressure hot water storage tanks to improve the energy flexibility of the steam power unit," Energy, Elsevier, vol. 173(C), pages 926-936.
    3. Romero-Anton, N. & Martin-Escudero, K. & Portillo-Valdés, L.A. & Gómez-Elvira, I. & Salazar-Herran, E., 2018. "Improvement of auxiliary BI-DRUM boiler operation by dynamic simulation," Energy, Elsevier, vol. 148(C), pages 676-686.
    4. Cisek, Piotr & Taler, Dawid, 2019. "Numerical analysis and performance assessment of the Thermal Energy Storage unit aimed to be utilized in Smart Electric Thermal Storage (SETS)," Energy, Elsevier, vol. 173(C), pages 755-771.
    5. Andrzej Rusin & Martyna Tomala & Henryk Łukowicz & Grzegorz Nowak & Wojciech Kosman, 2021. "On-Line Control of Stresses in the Power Unit Pressure Elements Taking Account of Variable Heat Transfer Conditions," Energies, MDPI, vol. 14(15), pages 1-21, August.
    6. Erik Rosado-Tamariz & Miguel A. Zuniga-Garcia & Alfonso Campos-Amezcua & Rafael Batres, 2020. "A Framework for the Synthesis of Optimum Operating Profiles Based on Dynamic Simulation and a Micro Genetic Algorithm," Energies, MDPI, vol. 13(3), pages 1-23, February.
    7. Taler, Dawid & Dzierwa, Piotr & Taler, Jan, 2020. "New method for determining the optimum fluid temperature when heating pressure thick-walled components with openings," Energy, Elsevier, vol. 200(C).
    8. Sreepradha, Chandrasekharan & Panda, Rames Chandra & Bhuvaneswari, Natrajan Swaminathan, 2017. "Mathematical model for integrated coal fired thermal boiler using physical laws," Energy, Elsevier, vol. 118(C), pages 985-998.
    9. Taler, Jan & Trojan, Marcin & Dzierwa, Piotr & Kaczmarski, Karol & Węglowski, Bohdan & Taler, Dawid & Zima, Wiesław & Grądziel, Sławomir & Ocłoń, Paweł & Sobota, Tomasz & Rerak, Monika & Jaremkiewicz,, 2023. "The flexible boiler operation in a wide range of load changes with considering the strength and environmental restrictions," Energy, Elsevier, vol. 263(PB).
    10. Grądziel, Sławomir, 2019. "Analysis of thermal and flow phenomena in natural circulation boiler evaporator," Energy, Elsevier, vol. 172(C), pages 881-891.
    11. Rúa, Jairo & Nord, Lars O., 2020. "Optimal control of flexible natural gas combined cycles with stress monitoring: Linear vs nonlinear model predictive control," Applied Energy, Elsevier, vol. 265(C).
    12. Nowak, Grzegorz & Rusin, Andrzej & Łukowicz, Henryk & Tomala, Martyna, 2020. "Improving the power unit operation flexibility by the turbine start-up optimization," Energy, Elsevier, vol. 198(C).
    13. Trojan, Marcin, 2019. "Modeling of a steam boiler operation using the boiler nonlinear mathematical model," Energy, Elsevier, vol. 175(C), pages 1194-1208.
    14. Taler, Dawid & Dzierwa, Piotr & Kaczmarski, Karol & Taler, Jan, 2022. "Increase the flexibility of steam boilers by optimisation of critical pressure component heating," Energy, Elsevier, vol. 250(C).
    15. Rusin, Andrzej & Nowak, Grzegorz & Łukowicz, Henryk & Kosman, Wojciech & Chmielniak, Tadeusz & Kaczorowski, Maciej, 2021. "Selecting optimal conditions for the turbine warm and hot start-up," Energy, Elsevier, vol. 214(C).
    16. Neshumayev, Dmitri & Rummel, Leo & Konist, Alar & Ots, Arvo & Parve, Teet, 2018. "Power plant fuel consumption rate during load cycling," Applied Energy, Elsevier, vol. 224(C), pages 124-135.
    17. Badur, Janusz & Bryk, Mateusz, 2019. "Accelerated start-up of the steam turbine by means of controlled cooling steam injection," Energy, Elsevier, vol. 173(C), pages 1242-1255.

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