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Numerical simulation of wave-number effects on the performance of traveling wave pump-turbine in turbine mode

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  • Bai, Yang
  • Zhu, Qianming
  • Huang, Diangui

Abstract

Pumped storage represents an economically viable, highly efficient, and extensive energy storage solution, receiving substantial research attention worldwide. This study utilized the energy dissipation of fish swimming in the water, and the traveling wave plate was arranged in a vertical rectangular flow channel to obtain energy through reverse thinking. Numerical simulation was employed to investigate the performance characteristics of the traveling wave turbine under varying wave number across high and low water head. The results reveal that the efficiency at low water head starts to increase and then decreases with the increase of wave number. There is an optimal wave number N = 4 to maximize turbine efficiency, and the maximum efficiency under low water head condition is 89.35 %. The efficiency of the high head condition shows a continuous upward trend, with a maximum value of 92.27 % in the range of wave number studied. With the increase of wave number, the instantaneous mass flow coefficient and power coefficient become more stable. The advantage of increasing the wave number is that more traveling wave plates can participate in energy capture, which is conducive to reducing the force required by each traveling wave plate and making the pressure distribution in each working cavity more regular.

Suggested Citation

  • Bai, Yang & Zhu, Qianming & Huang, Diangui, 2024. "Numerical simulation of wave-number effects on the performance of traveling wave pump-turbine in turbine mode," Renewable Energy, Elsevier, vol. 229(C).
    • Handle: RePEc:eee:renene:v:229:y:2024:i:c:s0960148124007559
    DOI: 10.1016/j.renene.2024.120687
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    References listed on IDEAS

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