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Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units

Author

Listed:
  • Haijiao Wei

    (China North Vehicle Research Institute, Beijing 100072, China)

  • Yuanwei Lu

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Faculty of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Yanchun Yang

    (School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China)

  • Yuting Wu

    (Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Faculty of Mechanical and Energy Engineering, Beijing University of Technology, Beijing 100124, China)

  • Kaifeng Zheng

    (China North Vehicle Research Institute, Beijing 100072, China)

  • Liang Li

    (Inner Mongolia Daihai Power Generation Co., Ltd., Liangcheng County, Ulanqab 013750, China)

Abstract

The flexible mode of operation of coal-fired units can accommodate large-scale renewable power integration into the grid, providing more grid capacity. The flexibility transformation of coal-fired units in thermal power plants can be achieved through main steam extraction and reheated steam extraction. A 300 MW subcritical unit, 600 MW subcritical unit and 660 MW ultra-supercritical unit with six flexible operation modes were chosen as the research model to investigate the thermal adaptability for flexible operation. The results show that from the perspective of the source of steam extraction, the main steam extraction scheme is suitable for the flexible adjustment of peak load capacity, and the reheated extraction scheme is suitable for the flexible operation of low load and high thermal efficiency. Moreover, from the perspective of thermal performance adaptability, the 600 MW unit has a wider load regulation capacity than the 300 MW and 660 MW units, and is suitable as the peak shaving unit. This work can provide theoretical guidance for different types of coal-fired units in choosing flexible operation schemes.

Suggested Citation

  • Haijiao Wei & Yuanwei Lu & Yanchun Yang & Yuting Wu & Kaifeng Zheng & Liang Li, 2024. "Research on Thermal Adaptability of Flexible Operation in Different Types of Coal-Fired Power Units," Energies, MDPI, vol. 17(9), pages 1-19, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2185-:d:1387923
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    References listed on IDEAS

    as
    1. Zhao, Yongliang & Wang, Chaoyang & Liu, Ming & Chong, Daotong & Yan, Junjie, 2018. "Improving operational flexibility by regulating extraction steam of high-pressure heaters on a 660 MW supercritical coal-fired power plant: A dynamic simulation," Applied Energy, Elsevier, vol. 212(C), pages 1295-1309.
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    4. Wang, Zeyu & Diao, Yanhua & Zhao, Yaohua & Chen, Chuanqi & Liang, Lin & Wang, Tengyue, 2020. "Thermal performance of integrated collector storage solar air heater with evacuated tube and lap joint-type flat micro-heat pipe arrays," Applied Energy, Elsevier, vol. 261(C).
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