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 x 12 mm 2 and rectangular grooves of dimensions 0.20 mm wide by 0.42 mm deep, exceeded 90 W/cm 2 in the horizontal orientation and 150 W/cm 2 in the vertical orientation. Theoretical prediction of the capillary limitation in the horizontal orientation agreed reasonably well with the experimental data.
[1]
A. Faghri,et al.
Thick-Film Phenomenon in High-Heat-Flux Evaporation From Cylindrical Pores
,
1997
.
[2]
G. Schneider,et al.
Non-dimensional analysis for the heat transport capability of axially grooved heat pipes including liquid/vapor interaction
,
1980
.
[3]
A. Faghri,et al.
Thermal Characteristics of Conventional and Flat Miniature Axially Grooved Heat Pipes
,
1995
.
[4]
Heat Pipes for Cooling High Flux/High Power Semiconductor Chips
,
1993
.
[5]
J. E. Beam,et al.
Air-cooling system for metal oxide semiconductor controlled thyristors employing miniature heat pipes
,
1996
.
[6]
Yiding Cao,et al.
Micro/Miniature Heat Pipes and Operating Limitations
,
1994
.