The natural convection cooling capability in a compact item of electronic equipment was investigated quantitatively by experiment and numerical simulation with a simple channel model. The optimization of the channel sizes, especially the clearance between heated walls, was discussed. The channel model, which consists of a vertical duct of rectangular section, was applied as the experimental model of electronic equipment in this study. The channel model consists of two heated copper walls and two transparent acrylic walls. The clearance between the copper walls of the channel was varied from 5 mm to 15 mm. Temperature measurement on the copper wall surfaces and velocity measurement of natural air flow in the channel by using a particle image velocimetry (PIV) were conducted for a few clearances of the channel. Numerical simulation was also carried out, with a model following the experimental setup, for more detailed discussion of various clearances of the channel. The relationship between the clearance and the temperature rise of the walls or velocity profile was investigated. The correlation between the Rayleigh number and the Nusselt number was obtained from measured temperature. The natural cooling capability and the velocity profiles depend on the clearance between the copper walls. When the wall clearances are more than 15 mm, the cooling is not enhanced. On the other hand, in the case that the clearance becomes less than 7 mm, the cooling capability becomes significantly lower. Consequently, it is clarified that the clearance from 8 mm to 10 mm is the best size for natural cooling from the view point of the space and the capability.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4938-5
PROCEEDINGS PAPER
Optimization of Natural Air Cooling in a Vertical Channel of Electronic Equipment
Yasushi Nishino,
Yasushi Nishino
Toyama Prefectural University, Imizu, Toyama, Japan
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Masaru Ishizuka,
Masaru Ishizuka
Toyama Prefectural University, Imizu, Toyama, Japan
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Tomoyuki Hatakeyama,
Tomoyuki Hatakeyama
Toyama Prefectural University, Imizu, Toyama, Japan
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Shinji Nakagawa
Shinji Nakagawa
Toyama Prefectural University, Imizu, Toyama, Japan
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Yasushi Nishino
Toyama Prefectural University, Imizu, Toyama, Japan
Masaru Ishizuka
Toyama Prefectural University, Imizu, Toyama, Japan
Tomoyuki Hatakeyama
Toyama Prefectural University, Imizu, Toyama, Japan
Shinji Nakagawa
Toyama Prefectural University, Imizu, Toyama, Japan
Paper No:
IHTC14-22786, pp. 547-555; 9 pages
Published Online:
March 1, 2011
Citation
Nishino, Y, Ishizuka, M, Hatakeyama, T, & Nakagawa, S. "Optimization of Natural Air Cooling in a Vertical Channel of Electronic Equipment." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 3. Washington, DC, USA. August 8–13, 2010. pp. 547-555. ASME. https://doi.org/10.1115/IHTC14-22786
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