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

Haijiao Wei, Yuanwei Lu (), Yanchun Yang, Yuting Wu, Kaifeng Zheng and Liang Li
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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

Energies, 2024, vol. 17, issue 9, 1-19

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.

Keywords: coal-fired power unit; main steam extraction; reheated steam extraction; thermal energy storage; flexible operation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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