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Experimental test, numerical analysis and thermal calculation modeling of hundreds kWth-class supercritical CO2 fossil-fired boiler system

Author

Listed:
  • Zhu, Meng
  • Chen, Lei
  • Zhou, Lingang
  • Jiang, Long
  • Su, Sheng
  • Hu, Song
  • Xu, Kai
  • Wang, Can
  • Li, Aishu
  • Qing, Haoran
  • Zhou, Jing
  • Wang, Yi
  • Li, Hanjian
  • Xiang, Jun

Abstract

Boiler is one of the important parts for supercritical CO2 (S–CO2) power system. Currently, most studies are based on theoretical calculations and lack experimental validation. Besides, low flue gas temperature and high wall temperature significantly enhance convection heat transfer (CHT), resulting in the failure possibility of existing thermal calculation models (neglect CHT). This study aims to construct a thermal calculation model suitable for S–CO2 boiler. Firstly, the hundreds kWth-class S–CO2 diesel/coal-fired boiler system was built, and steady-state experiments were carried out. Secondly, to further evaluate CHT, a numerical model was established, and the reliability of simulation was verified. The results indicate that the proportion of CHT can reach 44.52%. The entrainment effect caused by high-speed jet leads to a negative velocity region near the cooling wall. Furthermore, there are velocity disturbances of non-mainstream direction near the cooling wall. These two lead to great enhancement of CHT. According to the above analysis, a proposed thermal calculation model (DCTCM-1D) considering CHT and wall temperature was constructed. Compared to existing models, DCTCM-1D has the lowest error, with the root mean square error of flue gas temperature, heat load, wall temperature and S–CO2 temperature being 22.54 °C, 0.94 kW/m2, 6.40 °C and 2.29 °C.

Suggested Citation

  • Zhu, Meng & Chen, Lei & Zhou, Lingang & Jiang, Long & Su, Sheng & Hu, Song & Xu, Kai & Wang, Can & Li, Aishu & Qing, Haoran & Zhou, Jing & Wang, Yi & Li, Hanjian & Xiang, Jun, 2023. "Experimental test, numerical analysis and thermal calculation modeling of hundreds kWth-class supercritical CO2 fossil-fired boiler system," Energy, Elsevier, vol. 284(C).
    • Handle: RePEc:eee:energy:v:284:y:2023:i:c:s0360544223019175
    DOI: 10.1016/j.energy.2023.128523
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    References listed on IDEAS

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    1. Zhu, Meng & Zhou, Jing & Chen, Lei & Su, Sheng & Hu, Song & Qing, Haoran & Li, Aishu & Wang, Yi & Zhong, Wenqi & Xiang, Jun, 2022. "Economic analysis and cost modeling of supercritical CO2 coal-fired boiler based on global optimization," Energy, Elsevier, vol. 239(PD).
    2. Liu, Chao & Xu, Jinliang & Li, Mingjia & Wang, Qingyang & Liu, Guanglin, 2022. "The comprehensive solution to decrease cooling wall temperatures of sCO2 boiler for coal fired power plant," Energy, Elsevier, vol. 252(C).
    3. Le Moullec, Yann, 2013. "Conceptual study of a high efficiency coal-fired power plant with CO2 capture using a supercritical CO2 Brayton cycle," Energy, Elsevier, vol. 49(C), pages 32-46.
    4. Zhou, Jing & Zhu, Meng & Su, Sheng & Chen, Lei & Xu, Jun & Hu, Song & Wang, Yi & Jiang, Long & Zhong, Wenqi & Xiang, Jun, 2020. "Numerical analysis and modified thermodynamic calculation methods for the furnace in the 1000 MW supercritical CO2 coal-fired boiler," Energy, Elsevier, vol. 212(C).
    5. Zhou, Jing & Zhu, Meng & Xu, Kai & Su, Sheng & Tang, Yifang & Hu, Song & Wang, Yi & Xu, Jun & He, Limo & Xiang, Jun, 2020. "Key issues and innovative double-tangential circular boiler configurations for the 1000 MW coal-fired supercritical carbon dioxide power plant," Energy, Elsevier, vol. 199(C).
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    Cited by:

    1. Bartosz Ciupek & Andrzej Frąckowiak, 2024. "Review of Thermal Calculation Methods for Boilers—Perspectives on Thermal Optimization for Improving Ecological Parameters," Energies, MDPI, vol. 17(24), pages 1-15, December.
    2. Qinglong Wu & Fan Fang & Jingyu Guan & Lingkun Zhu & Yang Chen & Lei Deng, 2024. "Numerical Simulation and Analysis of Semi-Industrial Retrofit for Tangentially Fired Boilers with Slag-Tap Technology," Energies, MDPI, vol. 17(24), pages 1-19, December.

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