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Optimization of start-up scheduling and life assessment for a steam turbine

Author

Listed:
  • Dong-mei, Ji
  • Jia-qi, Sun
  • Quan, Sun
  • Heng-Chao, Guo
  • Jian-xing, Ren
  • Quan-jun, Zhu

Abstract

In order to meet the requirement of frequent start-stop of the units, it is significant to optimize the operation scheme of the unit. A novel optimized mathematical model of a steam turbine was proposed at a previous paper of this study’s authors. In this study the supported vector machine (SVM) stress model of a 320 MW steam turbine was established based on 13 groups of start-up schemes. According to the novel optimized mathematical model and SVM stress model of the turbine, Genetic algorithm-particle swarm optimization was employed to search for the best values of the steam temperature rise rate. The optimization schedule can shorten the start-up time of 170 min in the premise of meeting the stress requirement. It is necessary to testify the feasibility of the optimized schedule, the fatigue, creep, and creep-fatigue life of the steam turbine rotor were analyzed by continuous damage mechanics (CDM) model. The results shown that the life assessment of the rotor from the nonlinear CDM is accordance with the bilinear failure criterion of ASME Section III, and the critical creep-fatigue damage of the rotor is 0.2083, and the life loss of the rotor after working 30 years under the optimized start-up schedule is 19.25%.

Suggested Citation

  • Dong-mei, Ji & Jia-qi, Sun & Quan, Sun & Heng-Chao, Guo & Jian-xing, Ren & Quan-jun, Zhu, 2018. "Optimization of start-up scheduling and life assessment for a steam turbine," Energy, Elsevier, vol. 160(C), pages 19-32.
    • Handle: RePEc:eee:energy:v:160:y:2018:i:c:p:19-32
    DOI: 10.1016/j.energy.2018.07.015
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    References listed on IDEAS

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    1. Alobaid, Falah & Postler, Ralf & Ströhle, Jochen & Epple, Bernd & Kim, Hyun-Gee, 2008. "Modeling and investigation start-up procedures of a combined cycle power plant," Applied Energy, Elsevier, vol. 85(12), pages 1173-1189, December.
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    3. Kosman, Gerard & Rusin, Andrzej, 2001. "The influence of the start-ups and cyclic loads of steam turbines conducted according to European standards on the component's life," Energy, Elsevier, vol. 26(12), pages 1083-1099.
    4. Tică, Adrian & Guéguen, Hervé & Dumur, Didier & Faille, Damien & Davelaar, Frans, 2012. "Design of a combined cycle power plant model for optimization," Applied Energy, Elsevier, vol. 98(C), pages 256-265.
    5. Ji, Dong-Mei & Sun, Jia-Qi & Dui, Yue & Ren, Jian-Xing, 2017. "The optimization of the start-up scheduling for a 320 MW steam turbine," Energy, Elsevier, vol. 125(C), pages 345-355.
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    Cited by:

    1. 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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