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Numerical investigation on thermal characteristics and flow distribution of a parallel micro-channel separate heat pipe in data center.

Author(s) : YUE C., ZHANG Q., ZHAI Z., et al.

Type of article: Article, IJR article

Summary

This study focuses on the flow distribution and heat transfer characteristics of the evaporation terminal of a micro-channel separate heat pipe (MCSHP) used in data center. A complete CFD model for the parallel tubes with simplified louvered fins of the evaporator structure was established to consider the thermal enhancement while reduce the computing costs. The CFD model was validated by comparing the cooling capacity and outlet temperature of MSCSHP with experiments. The transformation process from bubble flow to slug flow was visualized using VOF model. The simulations reveal that the maximum cooling capacity of the studied MCSHP system could reach 9610?W when the corresponding optimal refrigerant filling ratio is 65.27%. The generation and motion of vapor bubbles influence the height of liquid pool in the evaporation terminal, thus leaded to the change of effective heat transfer area. Moreover, it is found that configurations of inlet and outlet have great impacts on the distribution of mass flow and heat flux under low filling ratios. While under higher filling ratios, the heat flux distribution is not affected by these factors due to the flat tubes filled with two-phase refrigerant.

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Pages: 150-160

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Details

  • Original title: Numerical investigation on thermal characteristics and flow distribution of a parallel micro-channel separate heat pipe in data center.
  • Record ID : 30025375
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 98
  • Publication date: 2019/02
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.10.025

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