Multi-artery heat-pipe spreader: Lateral liquid supply |
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Authors: | GS Hwang E Fleming B Carne S Sharratt Y Nam P Dussinger YS Ju M Kaviany |
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Affiliation: | 1. Advanced Cooling Technologies, Inc., Lancaster, PA 17601, USA;2. Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA |
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Abstract: | We design and test a low thermal/hydraulic resistance, multi-artery heat-pipe spreader vapor chamber. Liquid (water) is supplied to a highly concentrated heat-source region through a monolayer evaporator wick and a set of lateral converging arteries, fabricated from sintered, spherical copper particles. The monolayer wick allows for a minimum evaporator resistance of 0.055 K/(W/cm2), which is related to a critical transition where the receding meniscus approaches the particle neck. Similar behavior is also observed in a monolayer-wick evaporator, partially submerged in liquid bath. After this minimum, local dryout occurs and increases the resistance. However, a continuous liquid supply through the lateral arteries does not allow for total dryout in the test limit of 580 W/cm2. These thermal/hydraulic behaviors are predicted using the local thermal equilibrium and nonequilibrium models. |
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