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RESEARCH PAPERS: Heat Pipes

Flat Miniature Heat Pipes With Micro Capillary Grooves

[+] Author and Article Information
R. Hopkins, A. Faghri, D. Khrustalev

Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139

J. Heat Transfer 121(1), 102-109 (Feb 01, 1999) (8 pages) doi:10.1115/1.2825922 History: Received January 23, 1997; Revised August 20, 1998; Online December 05, 2007

Abstract

Flat miniature heat pipes (FMHP’s) are shown to be very promising in the cooling of electronic component systems. This investigation presents a detailed experimental and theoretical analysis on maximum heat transfer capabilities of two copper-water FMHP’s with diagonal trapezoidal micro capillary grooves and one copper-water FMHP with axial rectangular micro capillary grooves. Maximum heat flux on the evaporator wall of the 120-mm long axial grooved heat pipe, with a vapor channel cross-sectional area of approximately 1.5 × 12 mm2 and rectangular grooves of dimensions 0.20 mm wide by 0.42 mm deep, exceeded 90 W/cm2 in the horizontal orientation and 150 W/cm2 in the vertical orientation. Theoretical prediction of the capillary limitation in the horizontal orientation agreed reasonably well with the experimental data.

Copyright © 1999 by The American Society of Mechanical Engineers
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