Highly subcooled flow boiling at high heat flux in a rectangular minichannel of 2 mm × 2 mm in dimension was experimentally investigated. The channel was heated only from the bottom wall of the channel and it is regarded as a model of cooling components on electric devices in mobile gears. Under the condition of high subcooling and high heat flux in the stagnant pool and conventional scale channel flow, many fine vapor bubbles are emitted from primary vapor bubbles on heated surfaces. This boiling regime is called microbubble emission boiling (MEB). If we realize MEB in a minichannel, high heat flux due to vaporization will be obtained and large pressure loss due to confinement of bubble will be avoided. This paper first reports the results of our early experimental investigations on MEB in a pool boiling system to introduce the appearance of MEB. In flow boiling experiment, we reports heat transfer characteristics and photographic observation.
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ASME 3rd International Conference on Microchannels and Minichannels
June 13–15, 2005
Toronto, Ontario, Canada
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4185-5
PROCEEDINGS PAPER
Microbubble Emission Boiling in a Rectangular Channel Flow
Manabu Tange,
Manabu Tange
University of Tokyo, Tokyo, Japan
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Makoto Watanabe,
Makoto Watanabe
University of Tokyo, Tokyo, Japan
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Fumio Takemura,
Fumio Takemura
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
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Masahiro Shoji
Masahiro Shoji
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
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Manabu Tange
University of Tokyo, Tokyo, Japan
Makoto Watanabe
University of Tokyo, Tokyo, Japan
Shu Takagi
University of Tokyo, Tokyo, Japan
Fumio Takemura
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Masahiro Shoji
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
Paper No:
ICMM2005-75231, pp. 139-143; 5 pages
Published Online:
November 11, 2008
Citation
Tange, M, Watanabe, M, Takagi, S, Takemura, F, & Shoji, M. "Microbubble Emission Boiling in a Rectangular Channel Flow." Proceedings of the ASME 3rd International Conference on Microchannels and Minichannels. ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d. Toronto, Ontario, Canada. June 13–15, 2005. pp. 139-143. ASME. https://doi.org/10.1115/ICMM2005-75231
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