The progressive evaporation and condensation processes in a micro heat pipe, with which high heat fluxes at the liquid–vapor interface are associated, render it a device of high thermal conductance. By coupling the phase-change interfacial resistance model with a mathematical model based on first principles for fluid flow and heat transfer, the axial temperature variations of the liquid and vapor phases as well as those of other field variables are characterized and analyzed. The findings provide a well-defined exposition of the validity of uniform-temperature assumption for the liquid and vapor phases in the analysis of micro heat pipes. In conjunction with the acquisition of liquid and vapor temperature profiles, the heat transfer characteristics of the evaporation process can be analyzed. The local evaporative heat transfer coefficient and heat flux are evaluated. The results indicate that both heat transfer coefficient and heat flux are of considerably high values, confirming that the heat transport capability of a micro heat pipe is dominated by the phase-change heat transfer at the liquid–vapor interface.
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November 2012
This article was originally published in
Journal of Heat Transfer
Research-Article
Thermal Analysis of a Water-Filled Micro Heat Pipe With Phase-Change Interfacial Resistance
Yew Mun Hung,
Yew Mun Hung
School of Engineering,
e-mail: hung.yew.mun@monash.edu
Monash University
,46150 Bandar Sunway
, Malaysia
e-mail: hung.yew.mun@monash.edu
Search for other works by this author on:
Kek-Kiong Tio
Kek-Kiong Tio
Faculty of Engineering and Technology
e-mail: kktio@mmu.edu.my
Multimedia University
,75450 Melaka
, Malaysia
e-mail: kktio@mmu.edu.my
Search for other works by this author on:
Yew Mun Hung
School of Engineering,
e-mail: hung.yew.mun@monash.edu
Monash University
,46150 Bandar Sunway
, Malaysia
e-mail: hung.yew.mun@monash.edu
Kek-Kiong Tio
Faculty of Engineering and Technology
e-mail: kktio@mmu.edu.my
Multimedia University
,75450 Melaka
, Malaysia
e-mail: kktio@mmu.edu.my
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received September 1, 2011; final manuscript received May 11, 2012; published online September 26, 2012. Assoc. Editor: Louis C. Chow.
J. Heat Transfer. Nov 2012, 134(11): 112901 (11 pages)
Published Online: September 28, 2012
Article history
Received:
September 1, 2011
Revision Received:
May 11, 2012
Citation
Mun Hung, Y., and Tio, K. (September 28, 2012). "Thermal Analysis of a Water-Filled Micro Heat Pipe With Phase-Change Interfacial Resistance." ASME. J. Heat Transfer. November 2012; 134(11): 112901. https://doi.org/10.1115/1.4006898
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