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Frontiers of Optoelectronics

ISSN 2095-2759

ISSN 2095-2767(Online)

CN 10-1029/TN

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Front. Optoelectron.    2016, Vol. 9 Issue (4) : 585-591    https://doi.org/10.1007/s12200-015-0502-2
RESEARCH ARTICLE
Water cooling radiator for solid state power supply in fast-axial-flow CO2 laser
Heng ZHAO,Bo LI,Wenjin WANG,Yi HU,Youqing WANG()
National Engineering Research Center for Laser Processing, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
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Abstract

Two different flow channel configurations on thermal resistances associated with the behavior of cooling of power device were studied in this paper. ANSYS Icepak 14.0 has been adopted as a numerical simulation tool. The simulation results from this study showed that the shapes of channels in cooling radiator play an important role in the thermal management of water cooling radiation system. The optimal channel design could improve the heat-dissipating efficiency by 80% in water cooling radiation system. The result also indicated that the thermal resistance of heat sinks decreased with the volumetric flow rate and the number of cylindrical columns in the flow channel. Experimental results were obtained under certain channel configurations and volume rates. Moreover, the results of numerical simulation can be explained well by the experimental results.
Keywords heat spreader      water cooling      turbulence generator      Icepak software     
Corresponding Author(s): Youqing WANG   
Just Accepted Date: 29 May 2015   Online First Date: 30 June 2015    Issue Date: 29 November 2016
 Cite this article:   
Heng ZHAO,Bo LI,Wenjin WANG, et al. Water cooling radiator for solid state power supply in fast-axial-flow CO2 laser[J]. Front. Optoelectron., 2016, 9(4): 585-591.
 URL:  
https://academic.hep.com.cn/foe/EN/10.1007/s12200-015-0502-2
https://academic.hep.com.cn/foe/EN/Y2016/V9/I4/585
Fig.1  Schematic diagram of water cooling radiation system
Fig.2  Photographs of the heating block
Fig.3  Engineering drawing of heat spreader with S flow channel design, the unit dimension is mm
Fig.4  Engineering drawing of heat spreader with cylindrical columns flow channel design, the unit dimension is mm
Fig.5  Photograph of water-cooling heat spreader with different flow channel designs
parameter description unit
Re Reynolds number of channel −
Rth effective thermal resistance −
E total energy J
u velocity m·s−1
k turbulence kinetic energy m2·s−2
p pressure Pa
h heat transfer coefficient W·m−2·k−1
H channel height m
Q heat transfer capacity W
T temperature K
ρ density Kg·m−3
λ thermal conductivity W·m−1·k−1
μ fluid viscosity Kg·m−1·s−1
ε turbulent energy dissipation rate m2·s−3
α inverse effective Prandtl numbers −
? difference −
Tab.1  Nomenclatures were used in governing equations
Fig.6  Thermal resistances at various flow rates for heat spreader (@300W) with S channel design
Fig.7  Thermal resistances at various flow rates for heat spreader (@300 W) with cylindrical columns design
Fig.8  Thermal resistances at various flow rates for heat spreader (@200 W) with S channel design
Fig.9  Thermal resistances at various flow rates for heat spreader (@200 W) with cylindrical columns design
Fig.10  Pressure drop at various flow rates for heat spreader (@300 W) with S channel design
Fig.11  Pressure drop at various flow rates for heat spreader (@300 W) with cylindrical columns design
Fig.12  Temperatures on the surface of heating block vs. pumping powers
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