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Numerical Simulation on the Structural Design of a Multi-Pore Water Diffuser during the External Ice Melting Process of an Ice Storage System

Author

Listed:
  • Lei Li

    (State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310000, China)

  • Yude Wu

    (State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310000, China)

  • Yi Lu

    (State Grid Jinhua Power Supply Company, Jinhua 321000, China)

  • Xiao Yang

    (Nari Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, China)

  • Qiyang Wang

    (Nari Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, China)

  • Xiaoai Wang

    (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin 300134, China)

  • Yulin Wang

    (Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin 300134, China)

Abstract

A water diffuser is a critical auxiliary equipment for an ice storage system during the external ice melting process. This paper proposes a linear multi-pore water diffuser for an ice storage system with 500 t of refrigeration capacity to enhance the performance of external ice melting. By establishing a three-dimensional two-phase volume of fluid (VOF) model, different structural designs of water diffusers for the ice storage device are numerically examined regarding the degree of turbulence, flow velocity, and pressure drop. The results show that the optimal water diffuser with five rows of trunk pipe and six perforated pores arranged in per row of branch pipe with a 4 mm diameter of perforated pores exhibiting a relatively lower degree of turbulence with a lower pressure drop compared with the other designs in this study. Meanwhile, the influence of the flow velocity on the ice melting process is also investigated by a numerical model of ice melting. It is found that the fed flow velocity from the main pipe inlet exhibits a great impact on the external ice melting process. Compared with the external ice melting process without the water diffuser, the external ice melting process with optimal water diffuser design under flow velocity of 1.0 m s −1 could shorten the overall ice-melting time by 16 h. Additionally, through adjusting the water flow velocity, different output cooling can be realized to provide a fast response speed to the cooling variations in demand of the terminal users with a reduced cost.

Suggested Citation

  • Lei Li & Yude Wu & Yi Lu & Xiao Yang & Qiyang Wang & Xiaoai Wang & Yulin Wang, 2022. "Numerical Simulation on the Structural Design of a Multi-Pore Water Diffuser during the External Ice Melting Process of an Ice Storage System," Energies, MDPI, vol. 15(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:6:p:2181-:d:772798
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    References listed on IDEAS

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