TRANSIENT THERMAL AND HYDRODYNAMIC MODELS OF A FLAT HEAT PIPE FOR THE COOLING OF ELECTRONIC COMPONENTS

2008 ◽  
Author(s):  
R. Sonan ◽  
Julien Pelle ◽  
D. Leger ◽  
M. Fakes
Keyword(s):  
Heat Pipe ◽  
Electronic Components ◽  
Hydrodynamic Models ◽  
Transient Thermal ◽  
Flat Heat Pipe

Transient Thermal and Hydrodynamic Performances of Flat Heat Pipe Subjected to Heating With Multiple Electronic Components

2008 ◽  
Author(s):  
R. Sonan ◽  
S. Harmand ◽  
J. Pelle´ ◽  
D. Leger ◽  
M. Fake`s
Keyword(s):  
Heat Pipe ◽  
Heat Removal ◽  
Copper Plate ◽  
Working Fluid ◽  
Governing Equations ◽  
Electronic Components ◽  
Pressure Distributions ◽  
Change Mechanisms ◽  
Transient Thermal ◽  
Flat Heat Pipe

This work is aimed to simulate the transient performances of a flat heat pipe (FHP) used to cool electronics components in automotive applications. A transient 3D thermal model (T3DTM) of the FHP wall is performed to calculate the heat transfer through the wall of the FHP. This model is coupled with a transient 2D hydrodynamic model (T2DHM) which determines the flows both in wick and vapour core. An energy balance and Clausius-Clapeyron law permit to represent the phase change mechanisms at the liquid-vapour interface. The performed T2DHM model includes the solution of the complete governing equations in both wick and vapor core. The T2DHM is able to predict the velocity and pressure distributions of the FHP working fluid and then the FHP transient response. That analysis helps determine the maximum pore radius of the wick necessary to support the total pressure drop in the FHP. The heat removal capability of the FHP is highlighted through a comparison with a solid copper plate of the overall dimensions as the FHP.

Study on Periodic Thermal-Switching Behavior of Flat Heat Pipe

2015 ◽  
Author(s):  
Shigeki Hirasawa ◽  
Tatsuya Nakamu ◽  
Tsuyoshi Kawanami ◽  
Katsuaki Shirai
Keyword(s):  
Heat Transfer ◽  
Heat Source ◽  
Heat Pipe ◽  
Heat Transfer Performance ◽  
Switching Behavior ◽  
Transfer Performance ◽  
Unsteady Heat Transfer ◽  
Cold Energy ◽  
Thermal Switching ◽  
Flat Heat Pipe

The coupling of the electrocaloric effect in thin films with thermal switches has the potential to be used for efficient refrigeration. We studied the unsteady heat transfer performance and periodic thermal-switching behavior of a flat heat pipe to transfer cold energy from a changing heat source. The condenser of the flat heat pipe was the changing heat source and changed from −20 W to +20 W every 5 s. The temperature of the condenser surface changed in accordance with the heat generation of the heat source. The evaporator was a plate with a mesh wick attached to a water-flow pipe. Cold energy transferred from the condenser surface to the evaporator surface only when the temperature of the condenser surface was lower than that of the evaporator surface. We analyzed the unsteady temperature change and heat transfer performance of the flat heat pipe by numerical simulation. The analytical results showed that it was necessary to have two thermal switches to separate the heat energy and cold energy of the changing heat source. Also, it was important to reduce the thermal resistance and heat capacity of the evaporator surface to improve the unsteady heat transfer performance of the heat pipe. Next, we measured the unsteady heat transfer performance of the flat heat pipe experimentally. The experimental results showed that the thermal-switching behavior was observed when the heat generation of the heat source changed every 5 s.

Thermal Field Analysis of Electric Propulsion Drive Motors with Flat Heat Pipe Cooling

2021 ◽  
Author(s):  
Chaofan Dong ◽  
Xuanyang Hu ◽  
Yuping Qian ◽  
Changjiang Wang ◽  
Weilin Zhuge ◽  
...  
Keyword(s):  
Heat Pipe ◽  
Electric Propulsion ◽  
Thermal Field ◽  
Field Analysis ◽  
Flat Heat Pipe
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