Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 14, 2019
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.