Spray cooling heat transfer on microstructured thin film enhanced surfaces

•Spray cooling heat transfer on thin film surfaces.•SiC/CNT/diamond thin film.•Significant cooling performance enhancement can be up to 610W/cm2. Experiments were performed with FC-72 (only for flow characteristics) and DI water to investigate heat transfer characteristics from enhanced surfaces thr...

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Bibliographic Details
Published in:Experimental thermal and fluid science 2015-11, Vol.68, p.123-134
Main Authors: Hsieh, Shou-Shing, Luo, Sueng-Yang, Lee, Ron-Yu, Liu, Hao-Hsiang
Format: Article
Language:English
Subjects:
Cooling
Diamond films
Diamonds
Droplets
Enhanced surfaces
Flow characteristics
Heat transfer
SiC/CNT/diamond thin film
Silicon carbide
Spray cooling
Thin films
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Summary:•Spray cooling heat transfer on thin film surfaces.•SiC/CNT/diamond thin film.•Significant cooling performance enhancement can be up to 610W/cm2. Experiments were performed with FC-72 (only for flow characteristics) and DI water to investigate heat transfer characteristics from enhanced surfaces through spray cooling. Three different enhanced microstructured surfaces of 50μm SiC, 10μm CNT and 50μm diamond thin films were examined. Three full-cone spray nozzles were used with low mass flow rates of 2.92×10−4kg/s to 17.85×10−4kg/s. Three different nozzle-to-surface distances of 20mm, 35mm and 50mm were tested. Both heat transfer data and spray flow characteristics visualization via a high-speed photographic image of droplet evolution impinging the heated surface were presented and discussed. Results indicate that significant cooling performance enhancement can be reached at about 610W/cm2 with a 50μm thin diamond film for the cases under study.
ISSN:0894-1777
1879-2286
DOI:10.1016/j.expthermflusci.2015.04.014