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Research on large-scale renewable energy power consumption by peak shaving system of coal-fired power unit integrated with thermal energy storage
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Haijiao WEI1, 2, Yuanwei LU1, 2, Jinkai LIU1, 2, Yuting WU1, 2
Thermal Power Generation | 2023, 52(2) : 79 - 89
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Thermal Power Generation | 2023, 52(2): 79-89
• Application of thermal energy storage technology •
Research on large-scale renewable energy power consumption by peak shaving system of coal-fired power unit integrated with thermal energy storage
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Haijiao WEI1, 2, Yuanwei LU1, 2, Jinkai LIU1, 2, Yuting WU1, 2
Affiliations
  • 1.Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
  • 2.MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing 100124, China
Published: 2023-02-25 doi: 10.19666/j.rlfd.202210251
Outline
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In order to reduce the phenomenon of "wind and solar energy power abandonment" caused by the mismatch between the on-grid electricity generated by renewable energy power and coal-fired power unit, the coal-fired power unit needs to achieve the deep peak shaving to provide the grid space for renewable energy power with the continuous increase of the installed capacity of renewable energy. At the same time, the coal-fired power unit provides the ability to further consume renewable energy power. The utilization of coupling reheated steam extraction with thermal energy storage and molten salt thermal energy storage heated by renewable energy power in deep peak shaving system of coal- fired power unit is proposed. The research on large-scale renewable energy power consumption by peak shaving system of coal-fired power unit integrated with thermal energy storage is discussed. Moreover, the comprehensive coal consumption for power generation and the CO2 emission is analyzed. The results show that, the power output of the coal-fired unit decreases from 300.03 MW to 210.07 MW when the reheated steam extraction mass flowrate is 270.70 t/h, and the maximum power of renewable energy power consumption by thermal energy storage system is 187.26 MW. When the stored heat is released, the power output of coal-fired unit increases from 300.03 MW to 348.68 MW. When the renewable energy power consumption per unit time is 187.26 MWh, the comprehensive coal consumption for power generation is reduced by 8.49 g/kWh and the CO2 emission is reduced by 28.23 t. This study provides a guiding idea for the absorption of high-proportion renewable energy power.

coal-fired power unit  /  steam extraction  /  thermal energy storage  /  deep peak shaving  /  renewable energy power consumption
Haijiao WEI, Yuanwei LU, Jinkai LIU, Yuting WU. Research on large-scale renewable energy power consumption by peak shaving system of coal-fired power unit integrated with thermal energy storage[J]. Thermal Power Generation, 2023 , 52 (2) : 79 -89 . DOI: 10.19666/j.rlfd.202210251
Funding
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  • National Natural Science Foundation of China(52076006)
Appendix
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Year 2023 volume 52 Issue 2
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51
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Article Info
doi: 10.19666/j.rlfd.202210251
  • Receive Date：2022-10-31
  • Online Date：2026-01-23
  • Published：2023-02-25
Article Data
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History
  • Received：2022-10-31
Funding
National Natural Science Foundation of China(52076006)
Affiliations
    1.Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
    2.MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing 100124, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202210251
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