Proceedings of the Institution of Mechanical Engineers - Part C, ( ISI ), Volume (236), No (7), Year (2021-10) , Pages (3831-3846)

Title : ( Characterisation of a plate heat exchanger chevron type with carbon-based nanofluids under pulsed condition )

Authors: AMINA HMOUD DHAEF ALIKHAN , Mohammad Javad Maghrebi ,

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Abstract

In industrial-thermal applications, pulsating flow along with carbon-based nanofluids is a well adopted active method, although not in plate heat exchangers (PHEs). The performance of a PHE with carbon-based nanofluids was experimentally evaluated by superimposing pulsating flow along with steady-state flow. The results demonstrated that the use of GNP-water, hybrid GNP/MWCNT-water, and MWCNT-water nanofluids with volume fractions ranging from 0.01% to 0.1% in a steady-state flow led to improved average heat-transfer rates of 1.34, 1.27, and 1.25, respectively. Furthermore, implementation of pulsating flow enhanced the average heat-transfer rate, in comparison to that of the steady-state flow in the same nanofluids, in the range of 10.9%–28.2%, 9%–25.4%, and 7.1%–14.8%, respectively. Pulsating flow in nanofluids improved heat-transfer rate more than it did in pure water owing to the enhancement of the Brownian motion of the suspended carbon-based nanoparticles. In the considered volume fractions from 0.01% to 0.1%, the pulsating flow condition increased the pressure drop by a factor of 1.48, 1.49, and 1.62 for the MWCNT-water, hybrid GNP/MWCNTwater, and GNP-water nanofluids, respectively, in comparison to pure water. The experimental results indicated that the pulsating flow had a more profound influence on the improvement of heat-transfer rate and pressure drop in the case of GNP-based nanofluid than in the others. This could be attributed to the unique platelet shape of the GNP nanoparticles and consequently the higher Brownian motion. The improvement in the heat-transfer rate, obtained through implementation of the pulsating flow condition, outweighed the cost of increase in pressure drop in all the cases. Among the nanofluids considered, the hybrid GNP/MWCNT-water nanofluid exhibited the best overall performance of 1.2.

Keywords

, Plate heat exchanger, hybrid carbon-based nanofluids, pulsating flow, heat-transfer rate, multi-wall carbon nanotube, graphene nanoparticle
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@article{paperid:1086782,
author = {ALIKHAN, AMINA HMOUD DHAEF and Maghrebi, Mohammad Javad},
title = {Characterisation of a plate heat exchanger chevron type with carbon-based nanofluids under pulsed condition},
journal = {Proceedings of the Institution of Mechanical Engineers - Part C},
year = {2021},
volume = {236},
number = {7},
month = {October},
issn = {0954-4062},
pages = {3831--3846},
numpages = {15},
keywords = {Plate heat exchanger; hybrid carbon-based nanofluids; pulsating flow; heat-transfer rate; multi-wall carbon nanotube; graphene nanoparticle},
}

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%0 Journal Article
%T Characterisation of a plate heat exchanger chevron type with carbon-based nanofluids under pulsed condition
%A ALIKHAN, AMINA HMOUD DHAEF
%A Maghrebi, Mohammad Javad
%J Proceedings of the Institution of Mechanical Engineers - Part C
%@ 0954-4062
%D 2021

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