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Numerical Simulation of Flow and Temperature Fields in a Deep Stratified Reservoir Using Water-Separating Curtain

Author

Listed:
  • Lifang Zhang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Jianmin Zhang

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Yong Peng

    (State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China)

  • Jiangyang Pan

    (Power China Zhongnan Engineering Corporation Limited, Changsha 410014, China)

  • Zhongxian Peng

    (Power China Zhongnan Engineering Corporation Limited, Changsha 410014, China)

Abstract

In this work, the flow and temperature fields of a thermally stratified reservoir under different settings of a water-separating curtain are simulated by using the standard k-ε turbulence model. In the simulation, two different equations of state including Boussinesq approximation and the density-temperature function have been used and compared. This study shows that Boussinesq approximation is more time-saving, and the density-temperature function has higher computational accuracy. Thus, the standard k-ε turbulence model with two equations of state is applied to study the effect of adding a water-separating curtain in the stratified reservoir on the Discharged Water Temperature (DWT). It is found that adding the Water-Separating Curtain (WSC) can effectively increase the discharged water temperature. Moreover, the different arrangements of WSC have obvious effects on the discharged water temperature. For example, the increased temperature by adding a WSC with full sealing is 1 °C higher than that by using the WSC with a bottom opening height of 2 m. However, the maximum pressure difference acting on the WSC for the former WSC is 100 Pa higher than that for the latter WSC. In addition, this study shows that the different equations of state have little effect on the simulation results. Considering the calculation efficiency, equations of state using the Boussinesq approximation can be recommended to save the calculation time.

Suggested Citation

  • Lifang Zhang & Jianmin Zhang & Yong Peng & Jiangyang Pan & Zhongxian Peng, 2019. "Numerical Simulation of Flow and Temperature Fields in a Deep Stratified Reservoir Using Water-Separating Curtain," IJERPH, MDPI, vol. 16(24), pages 1-16, December.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:24:p:5143-:d:298598
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    References listed on IDEAS

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    1. Politano, Marcela & Haque, MD.M. & Weber, Larry J., 2008. "A numerical study of the temperature dynamics at McNary Dam," Ecological Modelling, Elsevier, vol. 212(3), pages 408-421.
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    Cited by:

    1. Ji, Qianfeng & Li, Kefeng & Wang, Yuanming & Feng, Jingjie & Li, Ran & Liang, Ruifeng, 2022. "Effect of floating photovoltaic system on water temperature of deep reservoir and assessment of its potential benefits, a case on Xiangjiaba Reservoir with hydropower station," Renewable Energy, Elsevier, vol. 195(C), pages 946-956.
    2. He, Wei & Zhang, Xufan & Zhang, Jian & Xu, Hui & Zhou, Hongxing, 2023. "Regulating outflow temperature for multi-objective operation of cascade reservoirs: A case study," Renewable Energy, Elsevier, vol. 211(C), pages 155-165.

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