Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

2016 ◽  
Vol 107 ◽  
pp. 420-430 ◽  
Author(s):  
Daxiang Deng ◽  
Wei Wan ◽  
Junyuan Feng ◽  
Qingsong Huang ◽  
Yu Qin ◽  
...  
Keyword(s):  
Experimental Study ◽  
Pool Boiling ◽  
Porous Coating

Pool Boiling Heat Transfer with Nanotube Arrays Surface on Titanium

2012 ◽  
Vol 550-553 ◽  
pp. 2913-2916 ◽  
Author(s):  
Jin Liang Tao ◽  
Xin Liang Wang ◽  
Pei Hua Shi ◽  
Xiao Ping Shi
Keyword(s):  
Heat Transfer ◽  
Boiling Heat Transfer ◽  
Heat Transfer Performance ◽  
Pool Boiling ◽  
Nucleate Boiling ◽  
Test Fluid ◽  
Porous Coating ◽  
Pool Boiling Heat Transfer ◽  
Nucleate Boiling Heat Transfer ◽  
Boiling Heat Transfer Coefficient

In this paper, a new porous coating was formed directly on the surface of titanium metal via anodic oxidation. And by the SEM, the morphology of the coating, which is composed of well-ordered perpendicular nanotubes, was characterized. Moreover, taking deionized water as the test fluid, a visualization study of the coating on its pool boiling heat transfer performance was made. The results demonstrated that compared with the smooth surface, the nucleate boiling heat transfer coefficient can increase 3 times while the nucleate boiling super heat was reduced 30%.

Experimental study on bubble departure frequency for pool boiling of water/NaCl solutions

2015 ◽  
Vol 51 (9) ◽  
pp. 1313-1320 ◽  
Author(s):  
Samane Hamzekhani ◽  
Majedeh Maniavi Falahieh ◽  
Mohammad Rasoul Kamalizadeh ◽  
Zahra Nazari
Keyword(s):  
Experimental Study ◽  
Pool Boiling

scholarly journals Determination of Pool Boiling Critical Heat Flux Enhancement in Nanofluids

2007 ◽  
Author(s):  
Bao H. Truong
Keyword(s):  
Heat Flux ◽  
Critical Heat Flux ◽  
Pool Boiling ◽  
Nucleate Boiling ◽  
Porous Coating ◽  
Transfer Coefficients ◽  
Two Phase ◽  
Sem Images ◽  
Heat Transfer Coefficients ◽  
Nucleate Boiling Heat Transfer

Nanofluids are engineered colloids composed of nano-size particles dispersed in common fluids such as water or refrigerants. Using an electrically controlled wire heater, pool boiling Critical Heat Flux (CHF) of Alumina and Silica water-based nanofluids of concentration less than or equal to 0.1 percent by volume were measured. Silica nanofluids showed a CHF enhancement up to 68% and there seems to be a monotonic relationship between the nanoparticle concentration and the magnitude of enhancement. Alumina nanofluids had a CHF enhancement up to 56% but the peak occurred at the intermediate concentration. The boiling curves in nanofluid were found to shift to the left of that of water and correspond to higher nucleate boiling heat transfer coefficients in the two-phase flow regime. Scanning Electron Microscopy (SEM) images show a porous coating layer of nanoparticles on wires subjected to nanofluid CHF tests. These coating layers change the morphology of the heater’s surface, and are responsible for the CHF enhancement. The thickness of the coating was estimated using SEM and was found ranging from 3.0 to 6.0 micrometers for Alumina, and 3.0 to 15.0 micrometers for Silica.

scholarly journals An experimental study of the effect of nanoparticle additives to the refrigerant r141b on the pool boiling process

2018 ◽  
Vol 4 (8 (94)) ◽  
pp. 59-66 ◽  
Author(s):  
Olga Khliyeva ◽  
Tetiana Lukianova ◽  
Yury Semenyuk ◽  
Vitaly Zhelezny ◽  
Artem Nikulin
Keyword(s):  
Experimental Study ◽  
Pool Boiling ◽  
Boiling Process ◽  
Nanoparticle Additives
Sign in / Sign up

Export Citation Format

Share Document