International Scientific Journal
EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX ON SIO2 THIN FILM DEPOSITED COPPER SUBSTRATE IN DI WATER AT ATMOSPHERIC PRESSURE
High heat flux at low excess temperature is the prime factor in pool boiling heat transfer. One of the methods to enhance peak heat flux in nucleate boiling is sur-face modification. The substrate of the copper has been modified by SiO2 thin film coating. The coating was performed on the substrate at three different thicknesses 250 nm, 500 nm, and 750 nm. The thin film coating was done by sputtering technique. The water contact angle was measured for bare and SiO2 thin film coated substrates. The contact angle decreased drastically because of more nucleation sites involved for wetting the substrate. The coating characteristics re-ported that the wettability of the copper substrate plays an important role in the critical heat flux enhancement. The critical heat flux test was carried out for bare copper substrate and SiO2 thin film coated copper substrates. The SiO2 thin film coating exhibited superhydrophillic nature on the substrate because of greater wettability. The superhydrophillic nature of the substrate enhanced the peak heat flux significantly. Also the boiling heat transfer coefficient was improved at high heat flux in nucleate boiling regime.
PAPER SUBMITTED: 2019-04-13
PAPER REVISED: 2019-05-12
PAPER ACCEPTED: 2019-06-03
PUBLISHED ONLINE: 2019-11-17
, VOLUME 24
, ISSUE Issue 1
, PAGES [549 - 556]
- Rinku Kumar Gouda., et. al., Pool boiling heat transfer enhancement with segmented finned microchannels structured surface, International Journal of Heat and Mass Transfer, 127 (2018), Part A, pp. 39-50
- Han Seo., et.al., Effects of hole patterns on surface temperature distributions in pool boiling, International Journal of Heat and Mass Transfer ,120 (2018), 1, pp. 587-596
- Hong Seok Jo., et.al., Supersonically spray-coated copper meshes as textured surfaces for pool boiling, International Journal of Thermal Sciences, 132 (2018), 2, pp. 26-33
- Jin S.Kim., et. al., Effect of surface roughness on pool boiling heat transfer of water on hydrophobic surfaces, International Journal of Heat and Mass Transfer, 118 ( 2018), 1, pp. 802-811
- Pradeep Mohan Kumar.K., et al., Computational Analysis and Optimization of Spiral Plate Heat Exchanger, J. of Applied Fluid Mechanics, Volume 11 (2018), Special Issue, pp.no, 121-128.
- Udaya Kumar Ganesan., et. al., Modified surfaces using seamless graphene/carbon nanotubes based nanostructures for enhancing pool boiling heat transfer, Experimental thermal and fluid science,96 (2018), 2, pp. 493-506
- Jure Voglar., et. al., Boiling performance on surfaces with capillary-length-spaced one- and two-dimensional laser-textured patterns, International Journal of Heat and Mass Transfer , 127 (2018), Part A, pp. 1188-1196
- Avudaiappan.T, et al., Potential Flow Simulation through Lagrangian Interpolation Meshless Method Coding, J. of Applied Fluid Mechanics, 11 (2018), Special Issue, pp. 129 -134.
- Ryan Holguin., et.al., Enhanced boiling heat transfer on binary surfaces, International Journal of Heat and Mass Transfer, 114 (2017), 2, pp. 1105-1113
- Vivekanandan. M et. al, Pressure Vessel Design using PV-ELITE Software with Manual Calculations and Validation by FEM, Journal of Engineering Technology, 8 (2019),1, pp.425-433.
- Saravanan. C., et al., Assessment of Mechanical Properties of Silicon Carbide and Graphene reinforced Aluminium Composite, Materials Today Proceeding doi.org/10.1016/j.matpr.2019.06.751
- Arvind Jaikumar., et. al., Scale effects of graphene and graphene oxide coatings on pool boiling enhancement mechanisms, International Journal of Heat and Mass Transfer, 109 (2017), 1, pp. 357-366