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Thermal performance analysis of flat heat pipe with graded mini-grooves wick

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  • Xin, Fei
  • Ma, Ting
  • Wang, Qiuwang

Abstract

Thermal management of micro electronic devices is one of the major issues for electronics application. Mini-grooves flat heat pipe is suitable to be used for small space electronics rapid cooling due to its high thermal conductivity, simple structure and good temperature uniformity. In this paper, an axial fluid flow and heat transfer mathematical model of mini-grooves flat heat pipe in steady state is built to study the axial distributions of key parameters such as pressure, velocity and wall temperature. As the wick structure plays an important role in the mini-grooves flat heat pipe heat transfer enhancement, the influence of mini-grooves size and wall with grooves along the axial direction on the heat transfer coefficient of mini-grooves flat heat pipe is studied. It is found that aiming at designing the optimum mini-grooves flat heat pipe, the local wick needs to be close to in saturated state, and the vapor chamber needs to be large. In this way, a novel graded-grooves wick design is put forward for flat heat pipe, which can increase the effective thermal conductivity coefficient by 12.4% with heat transfer rate 5.0 W. And the grooves wick in slope type with simple fabrication accords with practical application.

Suggested Citation

  • Xin, Fei & Ma, Ting & Wang, Qiuwang, 2018. "Thermal performance analysis of flat heat pipe with graded mini-grooves wick," Applied Energy, Elsevier, vol. 228(C), pages 2129-2139.
    • Handle: RePEc:eee:appene:v:228:y:2018:i:c:p:2129-2139
    DOI: 10.1016/j.apenergy.2018.07.053
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    References listed on IDEAS

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    Cited by:

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