The Proceedings of Conference of Kyushu Branch
Online ISSN : 2424-2780
2019.72
Session ID : B33
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Pool Boiling Critical Heat Flux Enhancement by Liquid/Vapor Flow Separation Three-Dimensional Porous Structure
*Tomotaka UEKIKoji MIYAZAKITomohide YABUKIMassoud KAVIANY
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Abstract

Enahancement of critical heat flux (CHF) is important for cooling electronic devices with a high heat generation rate. In pool boiling, the downward liquid flow to the heating surface is interrupted by the strong upward vapor flow, regarded as hydrodynamic liquid-choking limit, triggers CHF phenomenon. We have been researching a new technique in order to enhance CHF where the paths of the liquid and vapor flows can be separated to overcome the hydrodynamic liquid-choking limit. The three-dimensional porous structure was fabricated by sintering of copper particles. It was confirmed that the generated vapor was successfully vented from the side of the structure as we aimed. The maximum critical heat flux is 2.9 MW/m2 that is 2.4 times larger than the CHF on a copper flat surface.

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© 2019 The Japan Society of Mechanical Engineers
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