Boiling heat transfer experiments were preformed for narrow-horizontal-channels at 0.1 MPa. Test fluid was ethanol. The height and the width of the test channels were in a range of 1.0 mm ∼ 4.0 mm and 1.0 mm ∼ 3.0 mm, respectively. The channel length was 30 mm and 60 mm. The boiling surface was at the center of the bottom wall of the flow channel. Both ends of the channel were opened to wide space filled with liquid. Pool boiling experiments for the small heat transfer surfaces of the diameter of 1.0 mm ∼ 20.0 mm were also performed. Following conclusions were obtained. As the diameter of the boiling surface became small in pool boiling, boiling heat transfer was enhanced and the critical heat flux increased. The relation between the boiling heat flux and the wall superheat in the narrow rectangular channel was the same as that of the pool boiling for the same heat transfer surface size. As the channel height became narrow, the critical heat flux became low. In the case of the narrow-rectangular channel, large-coalescent bubbles occupied the top part of the flow channel. When the large bubble reached one outlet of the channel, almost all coalescent bubbles in the channel left from the outlet. After the selective departure of bubble from a specific outlet had established, the small reverse-inclination of the flow channel had no effect to alter the bubble departure outlet. It was suggested that the considerable steady-circulation flow had established. The CHF condition was not given only by the mass balance that the liquid supply to the channel was equal to the vapor generation rate. It was suggested that other effects such as the circulation flow should be included into the consideration for the CHF condition.
Skip Nav Destination
ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels
June 22–24, 2009
Pohang, South Korea
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-4349-9
PROCEEDINGS PAPER
Study on Boiling Heat Transfer in Narrow Channel and Horizontal-Narrow-Flat Space Available to Purchase
Yasuo Koizumi,
Yasuo Koizumi
Shinshu University, Tokyo, Japan
Search for other works by this author on:
Hiroyasu Ohtake,
Hiroyasu Ohtake
Kogakuin University, Tokyo, Japan
Search for other works by this author on:
Takaaki Oshikawa
Takaaki Oshikawa
Kogakuin University, Tokyo, Japan
Search for other works by this author on:
Yasuo Koizumi
Shinshu University, Tokyo, Japan
Hiroyasu Ohtake
Kogakuin University, Tokyo, Japan
Takaaki Oshikawa
Kogakuin University, Tokyo, Japan
Paper No:
ICNMM2009-82113, pp. 53-57; 5 pages
Published Online:
September 21, 2010
Citation
Koizumi, Y, Ohtake, H, & Oshikawa, T. "Study on Boiling Heat Transfer in Narrow Channel and Horizontal-Narrow-Flat Space." Proceedings of the ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels. Pohang, South Korea. June 22–24, 2009. pp. 53-57. ASME. https://doi.org/10.1115/ICNMM2009-82113
Download citation file:
5
Views
Related Proceedings Papers
Related Articles
Insights Into Pool Boiling Heat Transfer on Minichannel Surfaces Through Point and Field Measurements
J. Heat Mass Transfer (February,2025)
Numerical Investigations on Enhancement of Pool Boiling Heat Transfer on a Mixed Wettability Surface Employing Lattice Boltzmann Method
J. Heat Mass Transfer (January,2024)
Effect of Electric Field Distribution Generated in a Microspace on Pool Boiling Heat Transfer
J. Heat Transfer (October,2014)
Related Chapters
Post-CHF Heat Transfer in Flow Boiling
Two-Phase Heat Transfer
Pool Boiling
Thermal Management of Microelectronic Equipment, Second Edition
Critical Heat Flux in Flow Boiling
Two-Phase Heat Transfer