HYSICAL PROPERTIES CHANGE AND HEAT TRANSFER ENHANCEMENT IN COMPACT-CHAMBER SPRAY COOLING USING HIGH-ALCOHOL SURFACTANT

2018 ◽  
Author(s):  
Li-Jia Jiang ◽  
Wen-Long Cheng ◽  
Hua Chen ◽  
Yu-Hang Peng
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Spray Cooling ◽  
High Alcohol ◽  
Transfer Enhancement

Phenomenon and Mechanism of Spray Cooling on Nanowire Arrayed and Hybrid Micro/Nanostructured Surfaces

2018 ◽  
Vol 140 (11) ◽  
Author(s):  
Jian-nan Chen ◽  
Rui-na Xu ◽  
Zhen Zhang ◽  
Xue Chen ◽  
Xiao-long Ouyang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
High Speed ◽  
Spray Cooling ◽  
High Heat ◽  
High Heat Flux ◽  
Transfer Enhancement ◽  
Nanostructured Surfaces ◽  
New Energy ◽  
Dry Out

Enhancing spray cooling with surface structures is a common, effective approach for high heat flux thermal management to guarantee the reliability of many high-power, high-speed electronics and to improve the efficiency of new energy systems. However, the fundamental heat transfer enhancement mechanisms are not well understood especially for nanostructures. Here, we fabricated six groups of nanowire arrayed surfaces with various structures and sizes that show for the first time how these nanostructures enhance the spray cooling by improving the surface wettability and the liquid transport to quickly rewet the surface and avoid dry out. These insights into the nanostructure spray cooling heat transfer enhancement mechanisms are combined with microstructure heat transfer mechanism in integrated microstructure and nanostructure hybrid surface that further enhances the spray cooling heat transfer.

scholarly journals The Impact of Nanofluids on Droplet/Spray Cooling of a Heated Surface: A Critical Review

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 80
Author(s):  
Yunus Tansu Aksoy ◽  
Yanshen Zhu ◽  
Pinar Eneren ◽  
Erin Koos ◽  
Maria Rosaria Vetrano
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Heated Surface ◽  
Spray Cooling ◽  
Heat Transfer Process ◽  
Transfer Enhancement ◽  
Physical Mechanisms ◽  
The Subject ◽  
The Impact ◽  
Droplet Spray

Cooling by impinging droplets has been the subject of several studies for decades and still is, and, in the last few years, the potential heat transfer enhancement obtained thanks to nanofluids’ use has received increased interest. Indeed, the use of high thermal conductivity fluids, such as nanofluids’, is considered today as a possible way to strongly enhance this heat transfer process. This enhancement is related to several physical mechanisms. It is linked to the nanofluids’ rheology, their degree of stabilization, and how the presence of the nanoparticles impact the droplet/substrate dynamics. Although there are several articles on droplet impact dynamics and nanofluid heat transfer enhancement, there is a lack of review studies that couple these two topics. As such, this review aims to provide an analysis of the available literature dedicated to the dynamics between a single nanofluid droplet and a hot substrate, and the consequent enhancement or reduction of heat transfer. Finally, we also conduct a review of the available publications on nanofluids spray cooling. Although using nanofluids in spray cooling may seem a promising option, the few works present in the literature are not yet conclusive, and the mechanism of enhancement needs to be clarified.

scholarly journals The Active Effect of Electric Field on Heat Transfer Enhancement for Spray Cooling

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Haojie Xu ◽  
Junfeng Wang ◽  
Dongbao Wang ◽  
Wei Zhang ◽  
Jiang Yao
Keyword(s):  
Heat Transfer ◽  
Electric Field ◽  
Heat Transfer Enhancement ◽  
Spray Cooling ◽  
Transfer Enhancement

Heat transfer enhancement of spray cooling with ammonia by microcavity surfaces

2013 ◽  
Vol 50 (1) ◽  
pp. 245-250 ◽  
Author(s):  
B.H. Yang ◽  
H. Wang ◽  
X. Zhu ◽  
Q. Liao ◽  
Y.D. Ding ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Spray Cooling ◽  
Transfer Enhancement
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