Combined effect of physical properties and convective heat transfer coefficient of nanofluids on their cooling efficiency

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Combined effect of physical properties and convective heat transfer coefficient of nanofluids on their cooling efficiency. / Haghighi, Ehsan B.; Utomo, Adi T.; Ghanbarpour, Morteza; Zavareh, Ashkan I T; Nowak, Emilia; Khodabandeh, Rahmatollah; Pacek, Andrzej W.; Palm, Björn.

In: International Communications in Heat and Mass Transfer, Vol. 68, 3245, 01.11.2015, p. 32-42.

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Haghighi, Ehsan B. ; Utomo, Adi T. ; Ghanbarpour, Morteza ; Zavareh, Ashkan I T ; Nowak, Emilia ; Khodabandeh, Rahmatollah ; Pacek, Andrzej W. ; Palm, Björn. / Combined effect of physical properties and convective heat transfer coefficient of nanofluids on their cooling efficiency. In: International Communications in Heat and Mass Transfer. 2015 ; Vol. 68. pp. 32-42.

Bibtex

@article{c2ac7576e5ea4ad3b6e9a7172a991ec0,
title = "Combined effect of physical properties and convective heat transfer coefficient of nanofluids on their cooling efficiency",
abstract = "The advantages of using Al2O3, TiO2, SiO2 and CeO2 nanofluids as coolants have been investigated by analysing the combined effect of nanoparticles on thermophysical properties and heat transfer coefficient. The thermal conductivity and viscosity of these nanofluids were measured at two leading European universities to ensure the accuracy of the results. The relative thermal conductivity of nanofluids agreed with the prediction of the Maxwell model within +/-10% even at elevated temperature of 50°C indicating that the Brownian motion of nanoparticles does not affect thermal conductivity of nanofluids. The viscosity of nanofluids is well correlated by the modified Krieger-Dougherty model providing that the effect of nanoparticle aggregation is taken into account. It was found that at the same Reynolds number the advantage of using a nanofluid increases with increasing nanofluid viscosity which is counterintuitive. At the same pumping power nanofluids do not offer any advantage in terms of cooling efficiency over base fluids since the increase in viscosity outweighs the enhancement of thermal conductivity.",
keywords = "Cooling efficiency, Heat transfer coefficient, Nanofluid, Thermal conductivity, Viscosity",
author = "Haghighi, {Ehsan B.} and Utomo, {Adi T.} and Morteza Ghanbarpour and Zavareh, {Ashkan I T} and Emilia Nowak and Rahmatollah Khodabandeh and Pacek, {Andrzej W.} and Bj{\"o}rn Palm",
year = "2015",
month = nov,
day = "1",
doi = "10.1016/j.icheatmasstransfer.2015.08.011",
language = "English",
volume = "68",
pages = "32--42",
journal = "International Communications in Heat and Mass Transfer",
issn = "0735-1933",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Combined effect of physical properties and convective heat transfer coefficient of nanofluids on their cooling efficiency

AU - Haghighi, Ehsan B.

AU - Utomo, Adi T.

AU - Ghanbarpour, Morteza

AU - Zavareh, Ashkan I T

AU - Nowak, Emilia

AU - Khodabandeh, Rahmatollah

AU - Pacek, Andrzej W.

AU - Palm, Björn

PY - 2015/11/1

Y1 - 2015/11/1

N2 - The advantages of using Al2O3, TiO2, SiO2 and CeO2 nanofluids as coolants have been investigated by analysing the combined effect of nanoparticles on thermophysical properties and heat transfer coefficient. The thermal conductivity and viscosity of these nanofluids were measured at two leading European universities to ensure the accuracy of the results. The relative thermal conductivity of nanofluids agreed with the prediction of the Maxwell model within +/-10% even at elevated temperature of 50°C indicating that the Brownian motion of nanoparticles does not affect thermal conductivity of nanofluids. The viscosity of nanofluids is well correlated by the modified Krieger-Dougherty model providing that the effect of nanoparticle aggregation is taken into account. It was found that at the same Reynolds number the advantage of using a nanofluid increases with increasing nanofluid viscosity which is counterintuitive. At the same pumping power nanofluids do not offer any advantage in terms of cooling efficiency over base fluids since the increase in viscosity outweighs the enhancement of thermal conductivity.

AB - The advantages of using Al2O3, TiO2, SiO2 and CeO2 nanofluids as coolants have been investigated by analysing the combined effect of nanoparticles on thermophysical properties and heat transfer coefficient. The thermal conductivity and viscosity of these nanofluids were measured at two leading European universities to ensure the accuracy of the results. The relative thermal conductivity of nanofluids agreed with the prediction of the Maxwell model within +/-10% even at elevated temperature of 50°C indicating that the Brownian motion of nanoparticles does not affect thermal conductivity of nanofluids. The viscosity of nanofluids is well correlated by the modified Krieger-Dougherty model providing that the effect of nanoparticle aggregation is taken into account. It was found that at the same Reynolds number the advantage of using a nanofluid increases with increasing nanofluid viscosity which is counterintuitive. At the same pumping power nanofluids do not offer any advantage in terms of cooling efficiency over base fluids since the increase in viscosity outweighs the enhancement of thermal conductivity.

KW - Cooling efficiency

KW - Heat transfer coefficient

KW - Nanofluid

KW - Thermal conductivity

KW - Viscosity

UR - http://www.scopus.com/inward/record.url?scp=84941108099&partnerID=8YFLogxK

U2 - 10.1016/j.icheatmasstransfer.2015.08.011

DO - 10.1016/j.icheatmasstransfer.2015.08.011

M3 - Article

AN - SCOPUS:84941108099

VL - 68

SP - 32

EP - 42

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

SN - 0735-1933

M1 - 3245

ER -