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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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    6. José M. Cardemil & Allan R. Starke & Adriana Zurita & Carlos Mata‐Torres & Rodrigo Escobar, 2021. "Integration schemes for hybrid and polygeneration concentrated solar power plants," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 10(6), November.
    7. Li, Chao & Yang, Zhiping & Zhai, Rongrong & Yang, Yongping & Patchigolla, Kumar & Oakey, John E., 2018. "Off-design thermodynamic performances of a solar tower aided coal-fired power plant for different solar multiples with thermal energy storage," Energy, Elsevier, vol. 163(C), pages 956-968.
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    14. 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).
    15. Li, Chao & Zhai, Rongrong & Yang, Yongping & Patchigolla, Kumar & Oakey, John E. & Turner, Peter, 2019. "Annual performance analysis and optimization of a solar tower aided coal-fired power plant," Applied Energy, Elsevier, vol. 237(C), pages 440-456.
    16. Yan, Hui & Liu, Ming & Chong, Daotong & Wang, Chaoyang & Yan, Junjie, 2021. "Dynamic performance and control strategy comparison of a solar-aided coal-fired power plant based on energy and exergy analyses," Energy, Elsevier, vol. 236(C).
    17. Wang, Chaoyang & Liu, Ming & Zhao, Yongliang & Qiao, Yongqiang & Yan, Junjie, 2018. "Entropy generation analysis on a heat exchanger with different design and operation factors during transient processes," Energy, Elsevier, vol. 158(C), pages 330-342.
    18. Zhang, Nan & Yu, Gang & Huang, Chang & Duan, Liqiang & Hou, Hongjuan & Hu, Eric & Ding, Zeyu & Wang, Jianhua, 2020. "Full-day dynamic characteristics analysis of a solar aided coal-fired power plant in fuel saving mode," Energy, Elsevier, vol. 208(C).
    19. Ahmadi, Gholamreza & Toghraie, Davood & Akbari, Omid Ali, 2017. "Solar parallel feed water heating repowering of a steam power plant: A case study in Iran," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 474-485.
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    21. 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.
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