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Flow distribution characteristics of gravity- and pump-driven CO2 two-phase thermosyphon loops with three evaporators.

Author(s) : TONG Z., WANG P., HAN Z., WANG W.

Type of article: IJR article

Summary

Currently, most two-phase thermosyphon loop (TPTL) systems used in data centers feature a multi-evaporator design. The flow rate of the working fluid through each evaporator is one of the crucial factors affecting the cooling effect of the TPTL. Therefore, this paper conducts a comparative study on the flow distribution patterns of gravity- and pump-driven multi-evaporator TPTLs. The impacts of flow resistance and load distribution on each branch's flow distribution of working fluid are analyzed. It was found that the flow distributions of both gravity- and pump-driven TPTLs were influenced by load distribution. Under non-uniform load conditions, the flow rate tended to skew towards evaporators with higher loads. Additionally, the flow distribution of the gravity-driven TPTL was highly affected by individual branch flow resistance, which was markedly different from the pump-driven TPTL. Under uniform load conditions, the flow rate of the pump-driven TPTL was generally evenly distributed among the evaporators.

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Pages: 76-87

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Details

  • Original title: Flow distribution characteristics of gravity- and pump-driven CO2 two-phase thermosyphon loops with three evaporators.
  • Record ID : 30033822
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 173
  • Publication date: 2025/05
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2025.02.011

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