微熱管熱傳性能之數值分析

郭伯軒

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微熱管熱傳性能之數值分析

Numerical Analysis of the Heat Transfer Characteristics of Micro Heat Pipes

郭伯軒 , Masters　　Advisor：楊天祥　　

繁體中文

熱傳；微熱管；數值分析； numerical analysis ； heat transfer ； micro heat pipe

Abstract │ Reference (39) │ Times Cited (3) │ Altmetrics

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Micro heat pipes can be used in an electronic chip to render its temperature distribution more uniform.  In this thesis, based on the Young-Laplace equation and conservation laws for mass, momentum, and energy transport, we construct a one-dimensional thermofluid model for analyzing the steady-state flow and heat transfer characteristics of micro heat pipes consisting of V-shaped micro grooves.  The model is then used to calculate the flow and evaporation/condensation of the working fluid in a micro heat pipe, and to calculate the critical heat input beyond which the heat pipe would dry out.  It is found that the critical heat input can be increased by increasing the surface tension coefficient, thermal conductivity and density of the working fluid, but decreased if the viscosity of the working fluid increases.  Moreover, the equivalent thermal conductivity of a micro heat pipe increases with the convection heat transfer coefficients on the liquid-substrate and liquid-vapor interfaces.  We have also found that, for the case studied in this thesis, the critical heat input obtains a maximum when the apex angle of the grooves is around 33 degrees.

Reference ( 39 ) 〈TOP〉

[2] Babin, B. R., Peterson, G. P., Wu. D., 1990. Steady state modeling and testing of a micro heat pipe. J. Heat Transfer 112,595-601.
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Belarus, 295-310.
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[4] Wu, D., Peterson, G.P., 1991. Investigation of the transient
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thermodynamics of micro heat pipe. J. Heat Transfer 112, 595-601.
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[5] Swanson, L. W., Peterson, G. P., 1995. The interfacial thermodynamics of
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Times Cited (3) 〈TOP〉

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