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Manufacture of a biporous nickel wick and its effect on LHP heat transfer performance enhancement

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Abstract

This work describes a mixed powder sintering method that uses polymer as sacrificial substance to manufacture wicks for LHPs to improve the heat transfer performance of a conventional monoporous wick during high heat flux in LHP. The proposed porous manufacturing method is simple, efficient, structurally sound, and easily managed. Compared to findings in literatures for LHPs with monoporous wicks, the heat transfer performance of the proposed method is enhanced by nearly 80 %.

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Abbreviations

A h :

Heat exchange area (mm2)

D o :

Porous material outside diameter (mm)

D i :

Porous material inside diameter (mm)

h e :

Evaporation heat transfer coefficient (kW/m2 °C)

K w :

Permeability of porous structure (m2)

L w :

Wick length (mm)

Mw :

Density of the test liquid (kg/m3)

ṁ :

Fluid mass flow rate (kg/s)

∆P:

Pressure drop (N/m2)

Q :

Input wattage (W)

R total :

LHP total thermal resistance (°C/W)

T e :

Evaporator surface temperature (°C)

T c :

Condenser temperature (°C)

T v :

Vapor temperature (°C)

W t :

Weight of wick infused with test fluid (kg)

W w :

Wick net weight (kg)

σ:

Fluid surface tension coefficient (kg/m s)

ρ l :

Fluid density (density of test fluid) (kg/m3)

μ l :

Fluid viscosity coefficient (kg/m s)

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Acknowledgments

The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No. NSC:101-2221-E-157-003.

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Authors and Affiliations

  1. Department of Aviation Mechanical Engineering, China University of Science and Technology, Taipei City, Taiwan, ROC

    S. C. Wu

  2. Department of Mechatronic, Energy and Aerospace Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan County, Taiwan, ROC

    B. H. Hsieh

  3. Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, USA

    D. Wang

  4. Department of Mechanical Engineering, National Taiwan University, Taipei City, Taiwan, ROC

    Y. M. Chen

Authors
  1. S. C. Wu
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  2. B. H. Hsieh
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  3. D. Wang
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  4. Y. M. Chen
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Corresponding author

Correspondence to S. C. Wu.

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Wu, S.C., Hsieh, B.H., Wang, D. et al. Manufacture of a biporous nickel wick and its effect on LHP heat transfer performance enhancement. Heat Mass Transfer 51, 1549–1558 (2015). https://doi.org/10.1007/s00231-015-1503-9

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