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Dynamically Coupled Operation of Two-Tank Indirect TES and Steam Generation System

Author

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  • Xiaolei Li

    (Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Beijing 100190, China
    Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Beijing Engineering Research Center of Solar Thermal Power, Beijing 100190, China)

  • Zhifeng Wang

    (Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Beijing 100190, China
    Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Beijing Engineering Research Center of Solar Thermal Power, Beijing 100190, China)

  • Ershu Xu

    (School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China)

  • Linrui Ma

    (Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Beijing 100190, China
    Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Beijing Engineering Research Center of Solar Thermal Power, Beijing 100190, China)

  • Li Xu

    (Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Beijing 100190, China
    Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China
    Beijing Engineering Research Center of Solar Thermal Power, Beijing 100190, China)

  • Dongming Zhao

    (China Huaneng Group Co., Ltd., Beijing 100032, China)

Abstract

A thermal energy storage system is a critical component in concentrating solar power plants (CSPP), owing to which concentrating solar power (CSP) has superiorities over photovoltaic and wind power. Currently, the sole thermal energy storage (TES) system which is commercially applied to parabolic trough solar power (PTSP) plants worldwide is the two-tank indirect TES. In this study, the dynamic models of a solar field (SF), a two-tank indirect TES system, and a steam generation system (SGS) in a PTSP plant were developed and validated. Control and operation strategies on a clear day and a cloudy day were provided, and the dynamic simulations of the coupled operation using actual meteorological data were conducted. The influence of the two-tank indirect TES system on the dynamic characteristics of SGS on a system level was analyzed. Other key parameter variations were also presented. The results show that during the transition from the charge to the discharge process, the steam parameters slowly decrease. The variation of the molten salt height is further affected by the molten salt mass flow rate at the inlet and outlet of the molten salt tank. We adopted the PI control to adjust the thermal oil mass flow rate, thermal oil temperature, and water height. The developed dynamic models are useful in guiding system operation and control.

Suggested Citation

  • Xiaolei Li & Zhifeng Wang & Ershu Xu & Linrui Ma & Li Xu & Dongming Zhao, 2019. "Dynamically Coupled Operation of Two-Tank Indirect TES and Steam Generation System," Energies, MDPI, vol. 12(9), pages 1-42, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1720-:d:228874
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    References listed on IDEAS

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    Cited by:

    1. Yu, Qiang & Li, Xiaolei & Wang, Zhifeng & Zhang, Qiangqiang, 2020. "Modeling and dynamic simulation of thermal energy storage system for concentrating solar power plant," Energy, Elsevier, vol. 198(C).

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