IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v239y2025ics0960148124021311.html
   My bibliography  Save this article

Control of a pelton turbine with partial jet cutting driven by a cut-in jet deflector

Author

Listed:
  • Khan, Firoz
  • Kumar, Arun
  • Staubli, Thomas
  • Abbas, Ali
  • Devinar, Luciano

Abstract

In hydropower plants with Pelton turbines, the output is normally regulated by controlling the flow rate using a needle valve in the injector. However, movement of the needle is slow; as rule of thumb, the power gradient should be less than 3 % per second to avoid excessive pressure variations in the system. The temporal response of the needle valve is limited in most plants due to water hammer problems. This challenge of fast response can be met by diverting the jet using a jet deflector. Partial cutting of the jet enables fast control of power and the associated positive effect on stabilizing the electrical grid. In the present study, the implementation of the cut-in jet deflector has been analyzed with CFD (Computational Fluid Dynamics), with a particular focus on the effects on the torque of the Pelton runner and the hydraulic efficiency. The flow cut and diverted away from the runner at three angular positions of cut-in jet deflector at 3°, 6°, and 9° are obtained as 1 %, 6 %, and 11 % relative to the full jet flow at the nominal operating condition, the load decreased by 4.1 %, 11.6 %, and 26.1 % respectively for best efficiency point.

Suggested Citation

  • Khan, Firoz & Kumar, Arun & Staubli, Thomas & Abbas, Ali & Devinar, Luciano, 2025. "Control of a pelton turbine with partial jet cutting driven by a cut-in jet deflector," Renewable Energy, Elsevier, vol. 239(C).
    • Handle: RePEc:eee:renene:v:239:y:2025:i:c:s0960148124021311
    DOI: 10.1016/j.renene.2024.122063
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148124021311
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2024.122063?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Jean Decaix & Cécile Münch-Alligné, 2022. "Geometry, Mesh and Numerical Scheme Influencing the Simulation of a Pelton Jet with the OpenFOAM Toolbox," Energies, MDPI, vol. 15(19), pages 1-13, October.
    2. Xiao, Yexiang & Liu, Zishi & Liang, Quanwei & Liu, Jie & Zhang, Jin & Zhu, Yilin & Li, Xuesong & Gu, Chunwei, 2024. "The interaction between bucket number and performance of a Pelton turbine," Energy, Elsevier, vol. 287(C).
    3. Alimirzazadeh, Siamak & Kumashiro, Takashi & Leguizamón, Sebastián & Jahanbakhsh, Ebrahim & Maertens, Audrey & Vessaz, Christian & Tani, Kiyohito & Avellan, François, 2020. "GPU-accelerated numerical analysis of jet interference in a six-jet Pelton turbine using Finite Volume Particle Method," Renewable Energy, Elsevier, vol. 148(C), pages 234-246.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Xiao, Yexiang & Liu, Zishi & Liang, Quanwei & Liu, Jie & Zhang, Jin & Zhu, Yilin & Li, Xuesong & Gu, Chunwei, 2024. "The interaction between bucket number and performance of a Pelton turbine," Energy, Elsevier, vol. 287(C).
    2. Jean Decaix & Cécile Münch-Alligné, 2022. "Geometry, Mesh and Numerical Scheme Influencing the Simulation of a Pelton Jet with the OpenFOAM Toolbox," Energies, MDPI, vol. 15(19), pages 1-13, October.
    3. Bin Huang & Kexin Pu & Peng Wu & Dazhuan Wu & Jianxing Leng, 2020. "Design, Selection and Application of Energy Recovery Device in Seawater Desalination: A Review," Energies, MDPI, vol. 13(16), pages 1-19, August.
    4. Longgang Sun & Wenrui Fan & Hengte Zhou & Zhaoning Wang & Pengcheng Guo, 2024. "Numerical Assessment of the Hydrodynamic Excitation Characteristics of a Pelton Turbine," Sustainability, MDPI, vol. 16(23), pages 1-28, December.
    5. Chitrakar, Sailesh & Solemslie, Bjørn Winther & Neopane, Hari Prasad & Dahlhaug, Ole Gunnar, 2020. "Review on numerical techniques applied in impulse hydro turbines," Renewable Energy, Elsevier, vol. 159(C), pages 843-859.
    6. Guo, Bao & Xiao, Yexiang & Rai, Anant Kumar & Liang, Quanwei & Liu, Jie, 2021. "Analysis of the air-water-sediment flow behavior in Pelton buckets using a Eulerian-Lagrangian approach," Energy, Elsevier, vol. 218(C).
    7. Egusquiza, Mònica & Valero, Carme & Valentín, David & Presas, Alexandre & Egusquiza, Eduard, 2020. "Dynamic response of Pelton runners: Numerical and experimental analysis in prototypes," Renewable Energy, Elsevier, vol. 157(C), pages 116-129.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:239:y:2025:i:c:s0960148124021311. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.