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Optimization of solar field layout and flow velocity in a solar-aided power generation system

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  • Wu, Junjie
  • Han, Yu
  • Hou, Hongjuan
  • Sun, Yingying

Abstract

The solar-aided power generation (SAPG) system is an efficient way to integrate solar thermal energy into the normal coal-fired power plant. This work constructed a hydraulic model of a parabolic trough solar field and updated its thermodynamic evaluation algorithm. Moreover, this work aimed to optimize the solar field layout and flow velocity of heat transfer fluid (HTF) in view of net solar-to-electricity efficiency, which deducted pump power consumption from the solar-generated electricity. Furthermore, the non-uniformity of the outlet HTF temperature in each loop was found on the basis of the proposed model. This non-uniformity threatened the safety of the solar field. The number of loops should be reduced, and the flow velocity of HTF should increase to alleviate such non-uniformity. The case study based on a typical 330 MW SAPG system indicated that the optimal solar field layout consisted of 24 loops with eight solar collector assemblies in each loop. The optimal average flow velocity of HTF was 2.33 m/s. The corresponding net solar-to-electricity efficiency was 22.83%, and the net solar-generated electricity was 8.4984 MW.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:208:y:2020:i:c:s0360544220314511
    DOI: 10.1016/j.energy.2020.118344
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    1. 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.
    2. Wu, Junjie & Hou, Hongjuan & Yang, Yongping & Hu, Eric, 2015. "Annual performance of a solar aided coal-fired power generation system (SACPG) with various solar field areas and thermal energy storage capacity," Applied Energy, Elsevier, vol. 157(C), pages 123-133.
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    Cited by:

    1. Han, Yu & Sun, Yingying & Wu, Junjie, 2021. "A low-cost and efficient solar/coal hybrid power generation mode: Integration of non-concentrating solar energy and air preheating process," Energy, Elsevier, vol. 235(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. Ding, Zeyu & Hou, Hongjuan & Duan, Liqiang & Huang, Chang & Hu, Eric & Yu, Gang & Zhang, Yumeng & Zhang, Nan, 2021. "Simulation study on a novel solar aided combined heat and power system for heat-power decoupling," Energy, Elsevier, vol. 220(C).
    4. Wu, Junjie & Han, Yu, 2023. "Integration strategy optimization of solar-aided combined heat and power (CHP) system," Energy, Elsevier, vol. 263(PC).
    5. Li, Chao & Sun, Yang & Bi, Tianjiao & Zhai, Rongrong, 2023. "Performance enhancement of a solar-assisted pulverized coal power system by integrating a supercritical CO2 cycle," Renewable Energy, Elsevier, vol. 219(P1).
    6. Qin, Jiyun & Zhang, Qinglei & Hu, Eric & Duan, Jianguo & Zhou, Ying & Zhang, Hongsheng, 2022. "Optimisation of Solar Aided Power Generation plant with storage system adopting two non-displaced extraction steam operation strategies," Energy, Elsevier, vol. 239(PA).
    7. 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).
    8. Wu, Junjie & Li, Yun & Han, Yu, 2024. "A novel solar-aided lignite-fired power generation system with calcium looping CO2 capture, lignite pre-drying and feedwater preheating," Energy, Elsevier, vol. 296(C).

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