Abstract
Silver nanoparticles were deposited on copper substrate by boiling a new industrial nanofluid (DZ nanocoolant) in two different concentrations to investigate the saturated pool boiling enhancement of distilled water under atmosphere pressure. Microstructure, surface topography, and contact angle of the surfaces were examined. The optimum concentration with hydrophobic characteristics was deposited on the re-entrant inclined minichannel. Effects of reentrancy and hydrophobicity on bubble dynamics were observed and pool boiling curves were compared. As the nanoparticle concentration increased, the cluster deposition and hydrophobicity increased, however the deposition stability was decreased. The experimental results indicated that by increasing the nanofluid concentration to reach nanocoated polished surface, the critical heat flux (CHF) and heat transfer coefficient (HTC) of pool boiling increased. Nano-fins are introduced as a new concept for heat transfer enhancement. It was observed that inclination and reentrancy enhanced pool boiling performance in comparison with polished copper. Finally, as expected, the combined modification including coating the surface with deposited silver nanoparticles in internal side of re-entrant inclined minichannel possesses the highest CHF and HTC of 196W/cm2 and 10W/cm2K, respectively which are 120% and 100% higher than those of the plain surface.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
