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Thermodynamic performance of a novel dual-channel supercritical carbon dioxide cycle solar hybrid coal-fired power system
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Yanhong HAO1, 2, Zhulin SONG3, Yong ZHANG4, Yongjie TIAN4, Jingli BAI1, 2
Thermal Power Generation | 2025, 54(2) : 21 - 29
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Thermal Power Generation | 2025, 54(2): 21-29
• Integrated technology of source-grid-load-storage •
Thermodynamic performance of a novel dual-channel supercritical carbon dioxide cycle solar hybrid coal-fired power system
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Yanhong HAO1, 2, Zhulin SONG3, Yong ZHANG4, Yongjie TIAN4, Jingli BAI1, 2
Affiliations
  • 1.College of Environment and Resource, Shanxi University, Taiyuan 030006, China
  • 2.Engineering Research Center of CO2 Emission Reduction and Resource Utilization, Ministry of Education, Shanxi University, Taiyuan 030006,China
  • 3.Gemeng Zhangzi Clean Energy Co., Ltd., Changzhi 046600, China
  • 4.Shanxi Jingneng Lülin Power Generation Co., Ltd., Lüliang 033200, China
Published: 2025-02-25 doi: 10.19666/j.rlfd.202406151
Outline
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In reheat and recompression cycle system, the high-pressure carbon dioxide fluid has high temperature at outlet of the high-temperature reheater, resulting in insufficient heat absorption of the working fluid entering the heat source heater. To solve this problem, the model of a supercritical carbon dioxide (S-CO2) cycle photovoltaic coal complementary power generation system is established using Aspen Plus software. On the basis of the reheat-recompression cycle system, a novel dual-channel S-CO2 cycle solar hybrid coal-fired power system is proposed. Moreover, the performance of the above two systems is analyzed and compared by applying the exergy analysis method. The results indicate that, the exergy efficiency of the new system can reach 40.578%, which is 3.494 percentage points higher than that of the reheat-recompression cycle system, and the exergy efficiency of the S-CO2 cycle subsystem increases by 11.853 percentage points. The improvement of the exergy efficiency of the novel system can be attributed to the new path layout, which brings the third stage turbine to do work through full utilization of regenerative heat from the high temperature regenerator and reduces exergy losses from the main compressor and high temperature regenerator. Additionally, the contribution of solar energy in the new system is greater, resulting in an increase in output exergy from 9.846% to 10.059%.

supercritical dioxide cycle  /  solar hybrid coal-fired power generation  /  Aspen Plus simulation  /  exergy analysis  /  exergy efficiency
Yanhong HAO, Zhulin SONG, Yong ZHANG, Yongjie TIAN, Jingli BAI. Thermodynamic performance of a novel dual-channel supercritical carbon dioxide cycle solar hybrid coal-fired power system[J]. Thermal Power Generation, 2025 , 54 (2) : 21 -29 . DOI: 10.19666/j.rlfd.202406151
Funding
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  • General Project of Basic Research Plan in Shanxi Province(202303021221077)
  • Central Guide Local Science and Technology Development Fund Project(YDZX20201400001939)
  • Postgraduate Education Innovation Project of Shanxi Province(2022Y133)
Appendix
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Year 2025 volume 54 Issue 2
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110
48
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Article Info
doi: 10.19666/j.rlfd.202406151
  • Receive Date：2024-06-24
  • Online Date：2026-03-06
  • Published：2025-02-25
Article Data
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History
  • Received：2024-06-24
Funding
General Project of Basic Research Plan in Shanxi Province(202303021221077)
Central Guide Local Science and Technology Development Fund Project(YDZX20201400001939)
Postgraduate Education Innovation Project of Shanxi Province(2022Y133)
Affiliations
    1.College of Environment and Resource, Shanxi University, Taiyuan 030006, China
    2.Engineering Research Center of CO2 Emission Reduction and Resource Utilization, Ministry of Education, Shanxi University, Taiyuan 030006,China
    3.Gemeng Zhangzi Clean Energy Co., Ltd., Changzhi 046600, China
    4.Shanxi Jingneng Lülin Power Generation Co., Ltd., Lüliang 033200, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202406151
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