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Orientation independent two-phase heat spreaders for space constrained applications |
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| Authors: | S. Murthy Y. Joshi W. Nakayama |
| Affiliation: | a Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA b G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA c ThermTech International, Kanagawa 255-0004, Japan |
| Abstract: | This paper presents a novel orientation independent two-phase heat spreader for constrained space applications.1 The two-phase spreader plate has a central evaporator section with an integrated condenser along the edges. A micro-fabricated three-dimensional enhancement structure is employed to improve the heat transfer performance of the spreader plate. The thermal performance of the system is characterized at different power levels and also for various inclination angles. At the maximum heat flux of 6.3 W/cm2 under natural convection conditions, the junction temperature of the two-phase spreader was found to be 47.6 °C less than the junction temperature predicted for an equivalent solid metal plate subjected to similar boundary conditions. The performance of the spreader plate is found to be orientation independent as long as the enhancement structure in the evaporator remains flooded with the coolant liquid. |
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