Open AccessExperimental investigation on nucleate pool boiling heat transfer enhancement for nano-structured copper oxide coated heating surface
Author(s) -
G. N. Patel,
Sameer Sheshrao Gajghate,
Aniruddha Pal,
Upasath,
Swapan Bhaumik,
Sudev Das
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1240/1/012093
Subject(s) - materials science , wetting , nucleate boiling , copper , surface roughness , coating , composite material , critical heat flux , boiling , oxide , surface finish , heat transfer , nucleation , thin film , copper oxide , contact angle , heat transfer coefficient , metallurgy , nanotechnology , chemistry , thermodynamics , physics , organic chemistry
The present paper is based on experimental studies of augmentation of pool boiling heat transfer characteristics of unlike surfaces using water as a working fluid at atmospheric pressure. The test surfaces for the experiments include untreated, treated, copper oxide (CuO) thin film coated copper heating surfaces having coating thickness of 200 nm and 400 nm. The thin film coating is fabricated by sol-gel spin coating technique. The characterization of surfaces is done by considering wettability, surface roughness and topography study by the sessile droplet method, optical surface profile meter and X-ray diffraction [XRD]. The experiment is conducted in a closed boiling chamber and heat flux varied from 526.3 kW/m2 to 2546.689 kW/m 2 . The augmentation of heat transfer coefficients is found more than 40.60% of the higher thickness of copper oxide thin film coated copper heating surfaces. This is happened due to enhanced wettability, roughness and increase in active nucleation site density.