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An evaluation method of solar contribution in a solar aided power generation (SAPG) system based on exergy analysis

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  • Hou, Hongjuan
  • Xu, Zhang
  • Yang, Yongping

Abstract

Solar aided (coal fired) power generation (SAPG) is the synergy of solar thermal energy and fossil power plant technologies by using solar thermal energy to replace extraction steam to preheat feed water. SAPG combines environmental benefits of the former and large capacity, high efficiency and reliability of the latter. However, there are no appropriate criteria for evaluating the thermal performance of the system now. In this paper, a new evaluation method of SAPG system is proposed based on the exergy analysis and the characteristics of exergy flows crossing the boundary of the system. In the established evaluation method, a new ideal cycle is constructed in the perspective of external heat sources, and the difference of solar proportion among the exergy input, work output and exergy output in the same subsystem is considered. With the evaluation method, the contribution proportion of solar energy in a SAPG system can be determined. To illustrate applications of the new method, a parabolic trough solar field aided 600MW coal-fired power generation system is discussed as a case study.

Suggested Citation

  • Hou, Hongjuan & Xu, Zhang & Yang, Yongping, 2016. "An evaluation method of solar contribution in a solar aided power generation (SAPG) system based on exergy analysis," Applied Energy, Elsevier, vol. 182(C), pages 1-8.
    • Handle: RePEc:eee:appene:v:182:y:2016:i:c:p:1-8
    DOI: 10.1016/j.apenergy.2016.08.109
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    14. He, Wei & Luo, Xing & Evans, David & Busby, Jonathan & Garvey, Seamus & Parkes, Daniel & Wang, Jihong, 2017. "Exergy storage of compressed air in cavern and cavern volume estimation of the large-scale compressed air energy storage system," Applied Energy, Elsevier, vol. 208(C), pages 745-757.
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    17. Wang, Ruilin & Sun, Jie & Hong, Hui & Jin, Hongguang, 2018. "Comprehensive evaluation for different modes of solar-aided coal-fired power generation system under common framework regarding both coal-savability and efficiency-promotability," Energy, Elsevier, vol. 143(C), pages 151-167.
    18. Yu Han & Cheng Xu & Gang Xu & Yuwen Zhang & Yongping Yang, 2017. "An Improved Flexible Solar Thermal Energy Integration Process for Enhancing the Coal-Based Energy Efficiency and NO x Removal Effectiveness in Coal-Fired Power Plants under Different Load Conditions," Energies, MDPI, vol. 10(10), pages 1-18, September.
    19. Zhang, Maolong & Xu, Chao & Du, Xiaoze & Amjad, Muhammad & Wen, Dongsheng, 2017. "Off-design performance of concentrated solar heat and coal double-source boiler power generation with thermocline energy storage," Applied Energy, Elsevier, vol. 189(C), pages 697-710.
    20. Bame, Aaron T. & Furner, Joseph & Hoag, Ian & Mohammadi, Kasra & Powell, Kody & Iverson, Brian D., 2022. "Optimization of solar-coal hybridization for low solar augmentation," Applied Energy, Elsevier, vol. 319(C).
    21. Han, Yu & Sun, Yingying & Wu, Junjie, 2023. "A novel solar-driven waste heat recovery system in solar-fuel hybrid power plants," Energy, Elsevier, vol. 285(C).
    22. Huang, Chang & Hou, Hongjuan & Hu, Eric & Yu, Gang & Peng, Hao & Zhao, Jin & Yang, Yongping, 2019. "Stabilizing operation of a solar aided power generation (SAPG) plant by adjusting the burners’ tilt and attemperation flows in the boiler," Energy, Elsevier, vol. 173(C), pages 1208-1220.
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    24. Wu, Junjie & Han, Yu & Hou, Hongjuan & Sun, Yingying, 2020. "Optimization of solar field layout and flow velocity in a solar-aided power generation system," Energy, Elsevier, vol. 208(C).

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