Investigation of the effective thermal conductivity of metal-fiber wicks in low-temperature heat pipes

1977 ◽  
Vol 33 (2) ◽  
pp. 911-916 ◽  
Author(s):  
M. G. Semena ◽  
V. K. Zaripov
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Effective Thermal Conductivity ◽  
Heat Pipes ◽  
Metal Fiber ◽  
Temperature Heat

Investigation of the thermophysical characteristics of low-temperature heat pipes with metal fiber wicks

1976 ◽  
Vol 31 (3) ◽  
pp. 1044-1048 ◽  
Author(s):  
M. G. Semena ◽  
A. G. Kostornov ◽  
A. N. Gershuni ◽  
V. K. Zaripov ◽  
A. L. Moroz
Keyword(s):  
Low Temperature ◽  
Heat Pipes ◽  
Metal Fiber ◽  
Thermophysical Characteristics ◽  
Temperature Heat

Steady-State Investigation of Vapor Deposited Micro Heat Pipe Arrays

1995 ◽  
Vol 117 (1) ◽  
pp. 75-81 ◽  
Author(s):  
A. K. Mallik ◽  
G. P. Peterson
Keyword(s):  
Thermal Conductivity ◽  
Steady State ◽  
Surface Temperature ◽  
Heat Pipe ◽  
Effective Thermal Conductivity ◽  
Heat Pipes ◽  
Temperature Gradients ◽  
Bottom Surface ◽  
Micro Heat Pipe ◽  
Micro Heat Pipes

An experimental investigation of vapor deposited micro heat pipe arrays was conducted using arrays of 34 and 66 micro heat pipes occupying 0.75 and 1.45 percent of the cross-sectional area, respectively. The performance of wafers containing the arrays was compared with that of a plain silicon wafer. All of the wafers had 8 × 8 mm thermofoil heaters located on the bottom surface to simulate the active devices in an actual application. The temperature distributions across the wafers were obtained using a Hughes Probeye TVS Infrared Thermal Imaging System and a standard VHS video recorder. For wafers containing arrays of 34 vapor deposited micro heat pipes, the steady-state experimental data indicated a reduction in the maximum surface temperature and temperature gradients of 24.4 and 27.4 percent, respectively, coupled with an improvement in the effective thermal conductivity of 41.7 percent. For wafers containing arrays of 66 vapor deposited micro heat pipes, the corresponding reductions in the surface temperature and temperature gradients were 29.0 and 41.7 percent, respectively, and the effective thermal conductivity increased 47.1 percent, for input heat fluxes of 4.70 W/cm2. The experimental results were compared with the results of a previously developed numerical model, which was shown to predict the temperature distribution with a high degree of accuracy, for wafers both with and without the heat pipe arrays.

Emitting radiator based on low-temperature heat pipes

1995 ◽  
Vol 67 (1-2) ◽  
pp. 764-768
Author(s):  
L. L. Vasil'ev ◽  
L. E. Kanonchik
Keyword(s):  
Low Temperature ◽  
Heat Pipes ◽  
Temperature Heat

Evaporation, Condensation, and Flow in an Idealized Micro Heat Pipe

2002 ◽  
Author(s):  
Jin Zhang ◽  
Harris Wong
Keyword(s):  
Thermal Conductivity ◽  
Heat Pipe ◽  
Effective Thermal Conductivity ◽  
Three Dimensional ◽  
Heat Pipes ◽  
Rigorous Analysis ◽  
Evaporation And Condensation ◽  
Micro Heat Pipe ◽  
Complicated Geometry ◽  
Micro Heat Pipes

Micro heat pipes have been used in cooling micro electronic components. However their effective thermal conductivity is low compared with that of conventional heat pipes. Due to the complexity of the coupled heat and mass transport, and to the complicated three-dimensional bubble geometry inside micro heat pipes, there is a lack of rigorous analysis. As a result, the relatively low effective thermal conductivity remains unexplained. We have conceptualized an idealized micro heat pipe that eliminates the complicated geometry, but retains the essential physics. Given the simplified geometry, many effects can be studied, such as thermocapillary flow, and evaporation and condensation physics. In this talk, we will present the flow field induced by evaporation.

Low-temperature heat pipes

1985 ◽  
Vol 5 (3) ◽  
pp. 203-216 ◽  
Author(s):  
L.L. Vasiliev
Keyword(s):  
Low Temperature ◽  
Heat Pipes ◽  
Temperature Heat
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