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An Analysis of a Reheater Failure and a Proposal to Upgrade the Device Design

Author

Listed:
  • Piotr Duda

    (Institute of Thermal and Process Engineering, Cracow University of Technology, Al. Jana Pawła II 37, 31-864 Kraków, Poland)

  • Łukasz Felkowski

    (Institute of Thermal and Process Engineering, Cracow University of Technology, Al. Jana Pawła II 37, 31-864 Kraków, Poland)

  • Adam Zieliński

    (Institute for Ferrous Metallurgy, ul. K. Miarki 12-14, 44-100 Gliwice, Poland)

  • Andrzej Duda

    (Institute of Thermal and Process Engineering, Cracow University of Technology, Al. Jana Pawła II 37, 31-864 Kraków, Poland)

Abstract

The aim of this paper is to present an example of damage to the reheater tubes and conduct the material and numerical analyses to establish the cause of the device failure. Cracks were observed on the first, second, and third tube row. Close to the damaged area, a ferritic structure could be observed with highly degraded bainite areas, characterized by coagulation and coalescence of precipitates. The cause of the damage was analysed using the finite element method (FEM). The big yield of the tube cross-section confirmed that the tube may get damaged during subsequent cycles of the boiler operation, which was also proved by the microstructure testing results. For the reheater under analysis, the tubes have to be lengthened to achieve a reduction in stresses, arising due to thermal loads to values lower than allowable stresses according to Standard EN 13480-3. The modelling results confirmed the correct operation for the upgraded system.

Suggested Citation

  • Piotr Duda & Łukasz Felkowski & Adam Zieliński & Andrzej Duda, 2019. "An Analysis of a Reheater Failure and a Proposal to Upgrade the Device Design," Energies, MDPI, vol. 12(12), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:12:p:2255-:d:239353
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    References listed on IDEAS

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    1. Abdelghani MATINE & Monssef DRISSI-HABTI, 2019. "On-Coupling Mechanical, Electrical and Thermal Behavior of Submarine Power Phases," Energies, MDPI, vol. 12(6), pages 1-11, March.
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    3. Xinying Xu & Qi Chen & Mifeng Ren & Lan Cheng & Jun Xie, 2019. "Combustion Optimization for Coal Fired Power Plant Boilers Based on Improved Distributed ELM and Distributed PSO," Energies, MDPI, vol. 12(6), pages 1-24, March.
    4. Daqing Zhou & Huixiang Chen & Jie Zhang & Shengwen Jiang & Jia Gui & Chunxia Yang & An Yu, 2019. "Numerical Study on Flow Characteristics in a Francis Turbine during Load Rejection," Energies, MDPI, vol. 12(4), pages 1-15, February.
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