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Test and Modeling of the Hydraulic Performance of High-Efficiency Cooling Configurations for Gyrotron Resonance Cavities

Author

Listed:
  • Andrea Allio

    (Department of Energy “Galileo Ferraris” (DENERG), Politecnico di Torino, 10129 Turin, Italy)

  • Rosa Difonzo

    (Department of Energy “Galileo Ferraris” (DENERG), Politecnico di Torino, 10129 Turin, Italy)

  • Alberto Leggieri

    (THALES Microwave and Imaging Subsystems, 78140 Velizy-Villacoublay, France)

  • François Legrand

    (THALES Microwave and Imaging Subsystems, 78140 Velizy-Villacoublay, France)

  • Rodolphe Marchesin

    (THALES Microwave and Imaging Subsystems, 78140 Velizy-Villacoublay, France)

  • Laura Savoldi

    (Department of Energy “Galileo Ferraris” (DENERG), Politecnico di Torino, 10129 Turin, Italy)

Abstract

The design and manufacturing of different full-size mock-ups of the resonance cavity of gyrotrons, relevant for fusion applications, were performed according to two different cooling strategies. The first one relies on mini-channels, which are very promising in the direction of increasing the heat transfer in the heavily loaded cavity, but which could face an excessively large pressure drop, while the second one adopts the solution of Raschig rings, already successfully used in European operating gyrotrons. The mock-ups, manufactured with conventional techniques, were hydraulically characterized at the Thales premises, using water at room temperature. The measured pressure drop data were used to validate the corresponding numerical computational fluid dynamics (CFD) models, developed with the commercial software STAR-CCM+ (Siemens PLM Software, Plano TX, U.S.A.) and resulting in excellent agreement with the test results. When the validated models were used to compare the two optimized cooling configurations, it resulted that, for the same water flow, the mini-channel strategy gave a pressure drop was two-fold greater than that of the Raschig rings strategy, allowing a maximum flow rate of 1 × 10 −3 m 3 /s to meet a maximum allowable pressure drop of 0.5 MPa.

Suggested Citation

  • Andrea Allio & Rosa Difonzo & Alberto Leggieri & François Legrand & Rodolphe Marchesin & Laura Savoldi, 2020. "Test and Modeling of the Hydraulic Performance of High-Efficiency Cooling Configurations for Gyrotron Resonance Cavities," Energies, MDPI, vol. 13(5), pages 1-18, March.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:5:p:1163-:d:328227
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    Citations

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    Cited by:

    1. Peng Sun & Yiping Lu & Jianfei Tong & Youlian Lu & Tianjiao Liang & Lingbo Zhu, 2021. "Study on the Convective Heat Transfer and Fluid Flow of Mini-Channel with High Aspect Ratio of Neutron Production Target," Energies, MDPI, vol. 14(13), pages 1-15, July.
    2. Ebadi, Hossein & Cammi, Antonio & Difonzo, Rosa & Rodríguez, José & Savoldi, Laura, 2023. "Experimental investigation on an air tubular absorber enhanced with Raschig Rings porous medium in a solar furnace," Applied Energy, Elsevier, vol. 342(C).
    3. Laura Savoldi & Konstantinos A. Avramidis & Ferran Albajar & Stefano Alberti & Alberto Leggieri & Francisco Sanchez, 2021. "A Validation Roadmap of Multi-Physics Simulators of the Resonator of MW-Class CW Gyrotrons for Fusion Applications," Energies, MDPI, vol. 14(23), pages 1-15, December.

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