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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

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

Jian-nan Chen
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Zhen Zhang
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University

Pei-Xue Jiang
Beijing Key Laboratory for CO2 Utilization and Reduction Technology; Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

DOI: 10.1615/IHTC15.sat.009821
pages 7419-7427


キーワード: Spray and atomization, Heat transfer enhancement, spray cooling, nano structured

要約

Spray cooling heat transfer was studied experimentally using deionized water to investigate spray cooling of a smooth surface and nano- and hybrid micro/nano-structured surfaces. The nano-structures were ZnO nanowires grown on silicon substrates using the wet chemical method while the hybrid micro/nano-structures were obtained by depositing carbon nanotube (CNT) films on micro structured silicon surfaces fabricated through electrochemical deep reactive ion etching (DRIE). The results show that the heat transfer is enhanced on the nanostructured surfaces compared to the smooth surface. Coating CNT films on the micro-structured surfaces to form hybrid structures further improves the spray cooling heat transfer on the micro-structured surfaces.

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