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Influence of the Refrigerant Charge on the Heat Transfer Performance for a Closed-Loop Spray Cooling System

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  • Nianyong Zhou

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Hao Feng

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Yixing Guo

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Wenbo Liu

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Haoping Peng

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Yun Lei

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Song Deng

    (College of Petroleum Engineering and Energy, Changzhou University, Changzhou 213164, China)

  • Yu Wang

    (College of Urban Construction, Nanjing Tech University, Nanjing 210009, China)

Abstract

With the rapid increase of heat flux and demand for miniaturization of electronic equipment, the traditional heat conduction and convective heat transfer methods could not meet the needs. Therefore, the spray cooling experiment was carried out to obtain the basic heat transfer and cooling process. In this experiment, the spray cooling system was set up to investigate the influence of refrigerant charge on heat transfer performance in steady-state, dynamic heating, and dissipating processes. In a steady-state, the heat transfer coefficient increased with the rise of the refrigerant charge. In the dynamic dissipating process, both heat flux and heat transfer coefficient decreased rapidly after the critical heat flux, and the surface temperature drop point of each refrigerant charge was presented. The optimum refrigerant charge was provided considering the cooling parameters and the system operating performance. When the refrigerant operating pressure was 0.5 MPa, the spray cooling process presented with the higher heat flux, heat transfer coefficient, and cooling efficiency in this experiment. Meanwhile, the suitable surface temperature drop point and more gentle heat flux curves in the nucleate boiling region were obtained. The research results will contribute to the spray cooling system design, which should be operated before departure from the nucleate boiling point for avoiding cooling failure.

Suggested Citation

  • Nianyong Zhou & Hao Feng & Yixing Guo & Wenbo Liu & Haoping Peng & Yun Lei & Song Deng & Yu Wang, 2021. "Influence of the Refrigerant Charge on the Heat Transfer Performance for a Closed-Loop Spray Cooling System," Energies, MDPI, vol. 14(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:22:p:7588-:d:678187
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    References listed on IDEAS

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    1. Cheng, Wen-Long & Zhang, Wei-Wei & Chen, Hua & Hu, Lei, 2016. "Spray cooling and flash evaporation cooling: The current development and application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 614-628.
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    Cited by:

    1. Guojun Yu & Huihao Liu & Huijin Xu, 2023. "New Advancements in Heat and Mass Transfer: Fundamentals and Applications," Energies, MDPI, vol. 16(7), pages 1-4, March.
    2. Wang, Shangming & Zhou, Zhifu & Sang, Xuehao & Chen, Bin & Romeos, Alexandros & Giannadakis, Athanasios & Thrassos, Panidis, 2023. "Coupling dynamic thermal analysis and surface modification to enhance heat dissipation of R410A spray cooling for high-power electronics," Energy, Elsevier, vol. 284(C).

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