Thermal management in microelectronic devices involves development of high heat flux removal systems to meet the cooling requirements. Pool boiling addresses these demands by using latent heat transfer. In this study, heat transfer surfaces are fabricated by depositing porous coatings on an open microchannel surface. Screen printing and sintering are identified as techniques to deposit porous coatings and ensure substrate bonding respectively. Firstly, the effect of selective enhancement was studied by depositing porous coatings on (i) fin tops only (sintered-fin-tops), (ii) channels only (sintered-channels), and (iii) completely covering the boiling surface (sintered-throughout). The pool boiling performance with saturated distilled water at atmospheric pressure was obtained and a maximum critical heat flux (CHF) of 313 W/cm2 at a wall superheat of 7.5 °C was reported here for a sintered-throughout surface. Furthermore, the effect of channel width on sintered-throughout surfaces was studied. The results indicated that channel width plays an important in improving the performance. High speed videos are taken to understand the underlying mechanism. Additional nucleation sites and separate liquid-vapor pathways are identified as contributing mechanisms for the enhancement in CHF and heat transfer coefficient (HTC).
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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
Effect of Channel Width on Pool Boiling Enhancement of Open Microchannels With Selective Sintered Porous Coatings Available to Purchase
Arvind Jaikumar,
Arvind Jaikumar
Rochester Institute of Technology, Rochester, NY
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Satish G. Kandlikar
Satish G. Kandlikar
Rochester Institute of Technology, Rochester, NY
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Arvind Jaikumar
Rochester Institute of Technology, Rochester, NY
Satish G. Kandlikar
Rochester Institute of Technology, Rochester, NY
Paper No:
ICNMM2015-48477, V001T04A028; 9 pages
Published Online:
November 18, 2015
Citation
Jaikumar, A, & Kandlikar, SG. "Effect of Channel Width on Pool Boiling Enhancement of Open Microchannels With Selective Sintered Porous Coatings." 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. V001T04A028. ASME. https://doi.org/10.1115/ICNMM2015-48477
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