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Dynamic simulation and performance analysis of a parabolic trough concentrated solar power plant using molten salt during the start-up process

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  • Zhang, Shunqi
  • Liu, Ming
  • Zhao, Yongliang
  • Liu, Jiping
  • Yan, Junjie

Abstract

Daily start-up is a typical feature of concentrated solar power plants (CSPs) due to solar energy intermittency. Therefore, appropriate start-up operation strategies are significant for CSPs. A parabolic trough concentrated solar power plant (PTCSP) with molten salt (MS) is a potential technical route. However, little attention has been paid to the dynamic start-up performance of PTCSP using MS. To mend the research gap, the dynamic start-up simulation of PTCSP using MS is conducted. Main contributions of this study are the dynamic start-up simulation of PTCSP using MS and evaluation of two MS anti-freezing solutions. Results indicate that the outlet MS temperature of solar field transiently exceeds nominal values during start-up processes. The inlet feedwater temperature of the preheater is much lower than MS freezing temperature during start-up processes. Therefore, two anti-freezing solutions were used to avoid MS solidification. Compared with utilizing the recirculating pump, utilizing the low-load regenerative heater can enhance anti-freezing performance, which could reduce the maximum control deviation of the preheater inlet feedwater temperature by 2.0 °C and increase the average outlet MS temperature of the preheater by 2.4 °C. This study may provide guidance for the dynamic simulation and operation optimization of CSPs during start-up processes.

Suggested Citation

  • Zhang, Shunqi & Liu, Ming & Zhao, Yongliang & Liu, Jiping & Yan, Junjie, 2021. "Dynamic simulation and performance analysis of a parabolic trough concentrated solar power plant using molten salt during the start-up process," Renewable Energy, Elsevier, vol. 179(C), pages 1458-1471.
    • Handle: RePEc:eee:renene:v:179:y:2021:i:c:p:1458-1471
    DOI: 10.1016/j.renene.2021.07.127
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    References listed on IDEAS

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    1. Zhang, Shunqi & Liu, Ming & Zhao, Yongliang & Zhang, Kezhen & Liu, Jiping & Yan, Junjie, 2022. "Thermodynamic analysis on a novel bypass steam recovery system for parabolic trough concentrated solar power plants during start-up processes," Renewable Energy, Elsevier, vol. 198(C), pages 973-983.
    2. Zhang, Shunqi & Liu, Ming & Zhao, Yongliang & Liu, Jiping & Yan, Junjie, 2022. "Energy and exergy analyses of a parabolic trough concentrated solar power plant using molten salt during the start-up process," Energy, Elsevier, vol. 254(PC).
    3. Zhang, Peiye & Liu, Ming & Zhao, Yongliang & Yan, Junjie, 2023. "Performance analysis on the parabolic trough solar receiver-reactor of methanol decomposition reaction under off-design conditions and during dynamic processes," Renewable Energy, Elsevier, vol. 205(C), pages 583-597.

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