期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 54, 期 11-12, 页码 2334-2340出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2011.02.029
关键词
Multi-artery; Evaporator; Heat pipe; Heat spreader; Meniscus recess; Capillary; Wick; Vapor chamber; Converging wick
资金
- Defense Advanced Research Project Agency (DARPA)
- Space and Naval Warfare Systems Center (SPAWARS-YSCEN), San Diego, CA [N66001-08-C-2007]
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/cm(2)), 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/cm(2). These thermal/hydraulic behaviors are predicted using the local thermal equilibrium and nonequilibrium models. (C) 2011 Elsevier Ltd. All rights reserved.
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