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Performance maximization of a solar aided power generation (SAPG) plant with a direct air-cooled condenser in power-boosting mode

Author

Listed:
  • Huang, Chang
  • Hou, Hongjuan
  • Hu, Eric
  • Yu, Gang
  • Peng, Hao
  • Yang, Yongping
  • Wang, Lu
  • Zhao, Jin

Abstract

Solar aided (coal-fired) power generation (SAPG) technology has been approved to be an efficient way to use solar energy for power generation. However, most solar-rich areas are often short of cooling water supply, especially in China. The air-cooled condenser could alleviate this issue effectively for power plants in these areas. In this paper, a solar aided power generation with direct air-cool condenser (SAPG + ACC) plant is studied and optimized to maximize its performance. Due to the addition of solar heat in an SAPG plant, the exhaust steam flow rate leaving the turbine changes, especially in power-boost mode, which affects the turbine exit pressure and deviates the condenser from its designed operating condition. To achieve maximum net power output, the correlation among the optimum (turbine) exit pressure (OEP), the solar heat input and the ambient temperature, is obtained in this study. The annual plant's performances with four proposed operating strategies of the air-cooled condenser are compared and analyzed. The results show that for an SAPG + ACC plant, the operating Strategy.3, i.e. operated with the hourly OEP is the optimal one, resulting the plant has annual solar-to-electricity efficiency (SEE) of 17.82% and its levelized cost of electricity (LCOE) is of 0.09 $/kWh.

Suggested Citation

  • Huang, Chang & Hou, Hongjuan & Hu, Eric & Yu, Gang & Peng, Hao & Yang, Yongping & Wang, Lu & Zhao, Jin, 2019. "Performance maximization of a solar aided power generation (SAPG) plant with a direct air-cooled condenser in power-boosting mode," Energy, Elsevier, vol. 175(C), pages 891-899.
    • Handle: RePEc:eee:energy:v:175:y:2019:i:c:p:891-899
    DOI: 10.1016/j.energy.2019.03.133
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    1. Huang, Chang & Madonski, Rafal & Zhang, Qi & Yan, Yixian & Zhang, Nan & Yang, Yongping, 2022. "On the use of thermal energy storage in solar-aided power generation systems," Applied Energy, Elsevier, vol. 310(C).
    2. Shagdar, Enkhbayar & Shuai, Yong & Lougou, Bachirou Guene & Mustafa, Azeem & Choidorj, Dashpuntsag & Tan, Heping, 2022. "New integration mechanism of solar energy into 300 MW coal-fired power plant: Performance and techno-economic analysis," Energy, Elsevier, vol. 238(PC).
    3. Zhiling Luo & Qi Yao, 2022. "Multi-Model-Based Predictive Control for Divisional Regulation in the Direct Air-Cooling Condenser," Energies, MDPI, vol. 15(13), pages 1-18, June.
    4. Heng Zhang & Na Wang & Kai Liang & Yang Liu & Haiping Chen, 2021. "Research on the Performance of Solar Aided Power Generation System Based on Annular Fresnel Solar Concentrator," Energies, MDPI, vol. 14(6), pages 1-23, March.
    5. Huang, Chang & Hou, Hongjuan & Hu, Eric & Yu, Gang & Chen, Si & Yang, Yongping, 2020. "Measures to reduce solar energy dumped in a solar aided power generation plant," Applied Energy, Elsevier, vol. 258(C).
    6. Liu, Hongtao & Zhai, Rongrong & Patchigolla, Kumar & Turner, Peter & Yang, Yongping, 2020. "Performance analysis of a novel combined solar trough and tower aided coal-fired power generation system," Energy, Elsevier, vol. 201(C).

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