Boiling heat transfer enhancement via compound effect of Electro-Hydro-Dynamic (EHD) and contact angle has been experimentally and analytically investigated. A fluorinated dielectric liquid (Asahi Glass Co. Ltd, AE-3000) was selected as the working fluid. Pool boiling heat transfer in the saturated liquid was measured at atmospheric pressure. In order to change the contact angle between the boiling surface and the dielectric liquid, the different materials Cu, Cr, NiB, Sn, and mixture of 5 and 1.5 micro meter diamond particles were electrically deposited on a boiling surface. The critical heat flux (CHF) for different contact angles showed 20.5 ∼ 26.9 W/cm2 which was −7 ∼ 25 % of that for a non-coated Cu surface (21.5 W/cm2). Upon application of a −5 kV/mm electric field to the micro structured surface (the mixture of 5 and 1.5 micro meter particles), a CHF of 99 W/cm2 at a superheat of 33.5 K was obtained. The previous theoretical equation of pool boiling predicted the CHF with the electric field and without the electrode.
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ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
July 6–9, 2015
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-5687-1
PROCEEDINGS PAPER
Experimental Verification of Analytical Prediction of Pool Boiling CHF Incorporating the Effects of EHD and Contact Angle
Ichiro Kano,
Ichiro Kano
Yamagata University, Yonezawa, Japan
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Takahiro Sato,
Takahiro Sato
Yamagata University, Yonezawa, Japan
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Naoki Okamoto
Naoki Okamoto
Yamagata University, Yonezawa, Japan
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Ichiro Kano
Yamagata University, Yonezawa, Japan
Takahiro Sato
Yamagata University, Yonezawa, Japan
Naoki Okamoto
Yamagata University, Yonezawa, Japan
Paper No:
ICNMM2015-48661, V001T04A031; 7 pages
Published Online:
November 18, 2015
Citation
Kano, I, Sato, T, & Okamoto, N. "Experimental Verification of Analytical Prediction of Pool Boiling CHF Incorporating the Effects of EHD and Contact Angle." Proceedings of the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. San Francisco, California, USA. July 6–9, 2015. V001T04A031. ASME. https://doi.org/10.1115/ICNMM2015-48661
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