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Optimization study of a high-proportion of solar tower aided coal-fired power generation system integrated with thermal energy storage

Author

Listed:
  • Yuanhui, Wang
  • Liqiang, Duan
  • Shuaiyu, Ji
  • Jiaping, Guo
  • Hanfei, Zhang
  • Ming, Yang
  • Xingqi, Ding

Abstract

Solar aided coal-fired power generation technologies have proven to be effective in reducing fossil fuel consumption and greenhouse gas emission. In this research, a high-proportion solar tower aided coal-fired power generation system integrated with thermal energy storage system is proposed. According to the constraint conditions, the integration scheme with the highest solar coupling capacity is obtained, and its thermodynamic, economic and environmental performances are researched. The results indicate that the solar coupling capacity that can be accommodated by the 660 MW coal-fired unit after parameter optimization is 339.532 MWth. As the load rate decreases, the power generated from solar and solar to electricity efficiency gradually decreases while the proportion of power from solar increases. The proportion of power from solar reaches a maximum of 24.28 % at 50 % load rate. The effects of different thermal energy storage hours on the levelized cost of electricity are investigated, and the results show that the lowest levelized cost of electricity is only 41.62 $/MWh in the high-level direct normal irradiance area. The new system can reduce about 272,921 tons of CO2 emissions in a year at 100 % load rate. This study contributes to further promoting the development of a high-proportion solar aided coal-fired power generation system and realizing the low-carbon transition of coal-fired power generation industry.

Suggested Citation

  • Yuanhui, Wang & Liqiang, Duan & Shuaiyu, Ji & Jiaping, Guo & Hanfei, Zhang & Ming, Yang & Xingqi, Ding, 2024. "Optimization study of a high-proportion of solar tower aided coal-fired power generation system integrated with thermal energy storage," Energy, Elsevier, vol. 307(C).
    • Handle: RePEc:eee:energy:v:307:y:2024:i:c:s0360544224024988
    DOI: 10.1016/j.energy.2024.132724
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