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Experimental Investigation of Spray Cooling on Nano- and Hybrid-Structured Surfaces

[+] Author Affiliations
Zhen Zhang, Pei-Xue Jiang, Xiao-Long Ouyang, Jian-Nan Chen, David M. Christopher, Kai-Li Jiang

Tsinghua University, Beijing, China

Paper No. MNHMT2013-22173, pp. V001T01A003; 7 pages
doi:10.1115/MNHMT2013-22173
From:
  • ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
  • ASME 2013 4th International Conference on Micro/Nanoscale Heat and Mass Transfer
  • Hong Kong, China, December 11–14, 2013
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-3615-4
  • Copyright © 2013 by ASME

abstract

The heat transfer during spray cooling was studied experimentally using deionized water to investigate the spray characteristics and the differences between spray cooling on a smooth silicon surface and nano- and hybrid micro/nano-structured surfaces. The spray cooling experiments show that the heat transfer rates were best for the nano-structured surface, followed by the smooth surface coated with the SiO2 film and the pure silicon surface since the contact angle was smallest on the nano-structured surface and increased on the other two surfaces. The Critical Heat Flux (CHF) was largest for the 25G×25S surface coated with four Carbon Nano Tube (CNT) films with a 75.3% increase over the smooth surface.

Copyright © 2013 by ASME
Topics: Cooling , Sprays

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