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Research on the starting-up process of a prototype reversible pump turbine with misaligned guide vanes: An energy loss analysis

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  • Jin, Faye
  • Luo, Yongyao
  • Wang, Zhengwei

Abstract

With fossil fuel depletion and rising demand for renewable energy, reversible pump turbines (RPTs) are crucial for balancing energy supply. Understanding the dynamics of RPTs during starting-up is essential for optimal performance and stability in renewable energy systems. The unique “S" curve of RPTs can lead to instability under transient conditions. This study aimed to investigate the impacts of misaligned guide vanes (MGV) devices on prototype RPT stability, pressure pulsation, and performance improvement during the starting-up process. Using CFD simulation, flow characteristics and energy loss during start-up were analyzed and validated against experimental data. The results show that MGV enhances stability but induces significant energy loss. The analysis of entropy production, vorticity transport, and pressure fluctuation revealed high energy loss regions and the evolution of vortices during the starting-up process. This study provides new insights into hydrodynamic challenges and energy loss with MGV in prototype RPT start-up, with implications for optimizing pumped storage hydropower operations. Overall, this study has valuable engineering significance for the development and application of RPT in renewable energy systems.

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  • Jin, Faye & Luo, Yongyao & Wang, Zhengwei, 2024. "Research on the starting-up process of a prototype reversible pump turbine with misaligned guide vanes: An energy loss analysis," Energy, Elsevier, vol. 304(C).
    • Handle: RePEc:eee:energy:v:304:y:2024:i:c:s0360544224019935
    DOI: 10.1016/j.energy.2024.132219
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    References listed on IDEAS

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