Abstract
Miniature heat pipes are considered to be an innovative solution able to dissipate high heat with low working fluid fill charge, provide automatic temperature control, and operate with minimum energy consumption and low noise levels. A theoretical analysis on heat pipe thermal performance using Deionized water or n-pentane as the working fluid has been carried out. Analysis on the maximum heat and capillary limitation is conducted for three microgroove cross sections: rectangular, triangular, and trapezoidal. The effect of microgroove height and width, effective length, trapezoidal microgroove inclination angle, and microgroove shape on heat pipe performance is analysed. Theoretical and experimental investigations of the heat pipes’ heat transport limitations and thermal resistances are conducted.
Highlights
Using micro-heat pipes in electronic cooling offers appreciable advantages, such as a high heat transfer coefficient, low working fluid quantities, and high compactness [1]
Analysis is focused on the determination of the geometrical parameters and their effect on the maximum heat flux, used as the first index of the thermal performance of the heat pipe
Respecting working heat pipe capillary shows the maximum heatfrom flux for different value of the maximum heat flux iscondition, obtainedFigure for a 7groove depth ranging to 900groove μm and groove sizes. from
Summary
Using micro-heat pipes in electronic cooling offers appreciable advantages, such as a high heat transfer coefficient, low working fluid quantities, and high compactness [1]. Developed a mathematical model to predict the contact angle effect, thin film microgrooves They found that, heat transfer trough the thin film region profile, and heat flux distribution in et heat with trapezoidal microgrooves. Suh [13] analyzed liquid and mathematical model for heat transfer during liquid evaporation in a porous structure at high heat vapor flows in trapezoidal and sinusoidal microgrooves taking into account the shear stress effect flux. Analytical model for the heat pipe with various friction is proposed trapezoidal and sinusoidal microgroove and shapes developed predict the maximum flux, pressure losses, Based on thesizes previous works,isthe presenttostudy is focused on theheat prediction of heat pipe and thermal capillary radius. Various microgroove shapes and working fluids are tested in order microgroove sizes and shapes is developed to predict the maximum heat flux, pressure to losses, highlight their effects on heat pipe efficiency. A number of factors influencing heat transfer in the heat pipes are studied, compared, Various microgroove shapes and working fluids are tested in order to
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