THERMAL SCIENCE

International Scientific Journal

Muhammad Sajjad

,

Hassan Ali

,

Muhammad Sajid Kamran

THERMAL-HYDRAULIC ANALYSIS OF WATER BASED ZRO2 NANOFLUIDS IN SEGMENTAL BAFFLED SHELL AND TUBE HEAT EXCHANGERS

ABSTRACT
Thermal-hydraulic characteristics of water based ZrO2 nanofluids has been investigated in a segmental baffled shell and tube heat exchanger in turbulent flow regime. The effect of Reynolds number, nanoparticle loading, mass-flow rate, and tube lay-out has been analysed on overall heat transfer coefficient. The effect of Reynolds number on the tube side pressure drop and convective heat coefficient have also been discussed. The effect of shell side mass-flow rate was also investigated on shell side heat transfer coefficient determined using Bell-Delaware method. The nanoparticle volume concentration is taken very low i. e. 0.2%, 0.4%, and 0.8%, respectively. The improvement in both tube side convective heat transfer coefficient and overall heat transfer coefficient has been observed. The maximum improvement in the convective heat transfer coefficient is found to be 14.1% for 0.8% ZrO2 nanofluids. However, the percentage enhancement in tube side pressure drop was higher than the percentage increment in the tube side heat transfer coefficient.
KEYWORDS
nanofluids, heat exchangers, heat transfer coefficient, pressure drop
PAPER SUBMITTED: 2018-06-15
PAPER REVISED: 2018-09-28
PAPER ACCEPTED: 2018-09-29
PUBLISHED ONLINE: 2018-10-06
DOI REFERENCE: https://doi.org/10.2298/TSCI180615291S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2020, VOLUME 24, ISSUE Issue 2, PAGES [1195 - 1205]
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Thermal-hydraulic analysis of water based ZrO2 nanofluids in segmental baffled shell and tube heat exchangers

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence