Experimental investigation of optimum thermal performance and pressure drop of water-based Al2O3, TiO2 and ZnO nanofluids flowing inside a circular microchannel

Topuz, Adnan; Engin, Tahsin; Ozalp, A. Alper; Erdoğan, Beytullah; Mert, Serdar; Yeter, Alper

doi:10.1007/s10973-017-6790-6

Cited by 40 publications

(16 citation statements)

References 22 publications

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“…For a heat pipe heat exchanger and under the constant temperature as wall condition, Topuz et al 93 evaluated experimentally the thermal behavior of water‐based nanofluids (ZnO [18 nm], TiO 2 [10‐25 nm], and Al 2 O 3 [13 nm] nanoparticles at 0.5%, 0.7%, and 1.0% of volume fractions). Compared with DW as the base fluid, the best thermal enhancement of 15.3% was reached by using Al 2 O 3 nanofluid with 1.0% concentration, with no significant pressure penalty.…”

Section: Nanofluid Transport Under Turbulent Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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Recently, many researchers have focused on their studies on the analysis of nanofluid flows due to their participation in the enhancement of heat transfer rates in industrial processes. The ordinary fluids, such as water, mineral oils, and so on, are known for their low thermal conductivity in heat transfer processes. A significant enhancement in the thermal properties of ordinary fluid may be obtained by adding nanoparticles having a diameter of less than 100 nm or suspension of fibers. Better spreading, wetting, dispersion, and stability and with acceptable viscosity are the main advantageous properties of nanofluids on a solid surface. The nanofluids are encountered in various thermal engineering systems such as in heat exchangers, refrigeration, thermal management of fuel cells, cooling of nuclear reactors, microelectromechanical systems, and others. In particular, the thermal conversion is known as a great application of nanotechnology, and many studies have been achieved with such fluids in heat exchangers. Therefore, this paper aims to present a global insight into the different applications of nanofluids in various heat exchangers, that is, heat pipe and plate-fin heat exchangers. All research works have been summarized into three main parts: laminar, transition, and turbulent nanofluid flow regimes.

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Section: Nanofluid Transport Under Turbulent Flow Regimementioning

confidence: 99%

Advances of nanofluids in heat exchangers—A review

Menni

Chamkha

Ameur³

2020

Heat Trans

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“…A probe-type of the ultrasonic homogenizer is used to disperse the nanoparticles in deionized water used as base fluid (Ultrasonic Homogenizer Mark/Model: Optic Ivymen System / CY-500, Power: 500 W, Frequency: 20 kHz, Probe Diameter/Length: Ø5.6/60 mm). All nanofluids are got at three different volumetric concentrations (0.5%, 0.7%, 1.0%) at certain conditions [58,61].…”

Section: Preparation Of Nanofluidsmentioning

confidence: 99%

Determination and measurement of some thermophysical properties of nanofluids and comparison with literature studies

2021

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The thermophysical properties of nanofluids must be determined to evaluate their thermal performances like heat transfer, convection heat transfer coefficient, Nusselt number. The purpose of this study is to obtain the thermophysical properties of nanofluids. Al2O3, TiO2, and ZnO are used as a nanoparticle, while deionized water is used as base fluid. The solutions included nanoparticles in a way to be each with 0.5%, 0.7%, and 1.0% volumetric concentration were prepared. SDS was added to the solutions as a surfactant to prevent instability that occurred due to agglomeration and sedimentation. For thermal conductivity measurement, the device that works by the transient hot-wire method was used between 30-60?C temperatures. Also, for viscosity measurement, the device that works as based on the vibrating plate method was used between 20-50?C temperatures. Density and specific heat values are obtained with the help of the well-known equations while thermal conductivity and viscosity are measured. Thanks to this study, it is emphasized how thermophysical properties of nanofluids change according to temperature and volumetric concentration. Moreover, their curve fitting equations are obtained. All of the thermophysical properties compared with the studies in the literature. It is established that the thermal conductivity of nanofluids is proportional to temperature, and viscosity of it is proportional to volumetric concentrations but inversely with temperature. Finally, the effects of the augmentation in dynamic viscosity on pumping power were considered as well as the increase in thermal conductivity; thus, no abnormal heat transfer enhancement was observed.

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“…There are numerous research articles available in the literature 13–52 attributed to fluid flow and heat transfer characteristics of nanofluid in microchannels as well as MCHS. Vafaei and Wen 13,14 experimentally measured the effect of nanoparticle concentration (1-7vol.%) and volume flow rate (8-20ml/min) on fluid flow and heat transfer characteristics of Al2O3/water nanofluid in a circular microchannel (Di=510μm,t=160…”

Section: Introductionmentioning

confidence: 99%

“…Topuz et al. 41 experimentally measured the effect of nanoparticle concentration (0.5-1.0vol.%) and volume flow rate (20-50ml/min) on fluid flow and heat transfer characteristics of Al2O3/water, TiO 2 /water and ZnO /water nanofluids in a circular microchannel (Di=400,750 1000μm and L=200mm) under constant surface temperature condition. The results indicated that the maximum enhancement in HTC was obtained up to 21.7% for Al2O3/water nanofluid with nanoparticle concentration of 1.0vol.% as compared to DW.…”

Section: Introductionmentioning

confidence: 99%

“…Based upon the aforementioned research articles available in the literature, it was noticed that most of the research articles 13–52 performed parametric study on fluid flow and heat transfer characteristics of nanofluid in a microchannel as well as MCHS. However, correlations of friction factor and average Nusselt number of nanofluid were proposed in a few research articles 17,25,26,47,52 under specified fluid flow and heat transfer conditions.…”

Section: Introductionmentioning

confidence: 99%

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Single-phase fluid flow and heat transfer characteristics of nanofluid in a circular microchannel: Development of flow and heat transfer correlations

Lodhi

Sheorey

Dutta

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The convective heat transfer in microchannels with the use of nanofluids has proved to be a potential candidate for cooling of micro-electromechanical system devices. The current research article presents the experimental study on fluid flow and heat transfer characteristics of [Formula: see text]/water nanofluid in a microchannel under thermally developing laminar flow at Reynolds number ranging from 300 to 1000. The experimental set-up of a circular microchannel test section with an inner diameter of [Formula: see text] and length of [Formula: see text] is fabricated to conduct the experimental study. The effect of nanoparticle concentration ([Formula: see text]), Reynolds number ([Formula: see text]) on fluid flow and heat transfer characteristics of [Formula: see text]/water nanofluid have been measured and compared with that of distilled water (DW). The results indicate that the maximum enhancement in local heat transfer coefficient is achieved up to [Formula: see text], while friction factor is achieved up to [Formula: see text] for [Formula: see text]/water nanofluid with nanoparticle concentration of [Formula: see text] as compared to DW. The results showed that the performance evaluation criterion of [Formula: see text]/water nanofluid is greater than unity ([Formula: see text]), implying the benefits of nanofluids as compared to DW. Moreover, the predicted data obtained by the present proposed correlations for friction factor and local Nusselt number using [Formula: see text]/water nanofluid show reasonably good agreement with the deviations of [Formula: see text] and [Formula: see text], respectively, with the numerical data as compared to the predicted data obtained by the existing correlations available in the literature.

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Experimental investigation of optimum thermal performance and pressure drop of water-based Al2O3, TiO2 and ZnO nanofluids flowing inside a circular microchannel

Cited by 40 publications

References 22 publications

Advances of nanofluids in heat exchangers—A review

Advances of nanofluids in heat exchangers—A review

Determination and measurement of some thermophysical properties of nanofluids and comparison with literature studies

Single-phase fluid flow and heat transfer characteristics of nanofluid in a circular microchannel: Development of flow and heat transfer correlations

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