THERMAL SCIENCE

International Scientific Journal

Jagdeep M. Kshirsagar

,

Ramakant Shrivastava

,

Prakash S. Adwani

CHARICTERIZATION AND INVESTIGATION OF HEAT TRANSFER ENHANCEMENT IN POOL BOILING WITH WATER-ZNO NANOFLUID

ABSTRACT
The main focus of the present work is to characterize the ZnO nanoparticles further to prepare the ZnO nanofluid with base fluid as deionised water and to investigate enhancement in critical heat flux at different weight concentrations of nanofluids. The size of nanoparticles is found to be 55.25 nm. To study critical heat flux enhancement using ZnO nanofluid, different weight concentration of nanofluid are prepared. It is observed that maximum enhancement is 47.16% for 1.5 wt.% of ZnO nanofluid. Surface roughness and scanning electron microscopy of heater surface is carried out for all weight concentrations of nanofluid, which shows increase in Ra value up to some extent then it decreases and porosity on the surface of heater observed in scanning electron microscopy, is the source to enhance critical heat flux.
KEYWORDS
nanoparticles, nanofluid, critical heat flux (CHF), enhancement, Deionised Water (DI)
PAPER SUBMITTED: 2015-05-16
PAPER REVISED: 2015-10-26
PAPER ACCEPTED: 2015-12-08
PUBLISHED ONLINE: 2015-12-19
DOI REFERENCE: https://doi.org/10.2298/TSCI150516200K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 5, PAGES [2039 - 2047]
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Charicterization and investigation of heat transfer enhancement in pool boiling with water-ZnO nanofluid

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