Thermal performance of a micro heat exchanger (MHE) working with zirconia-based nanofluids for industrial cooling

Nikkhah, Vahid; Nakhjavani, Sh.

doi:10.1007/s40090-019-0183-6

Cited by 21 publications

(10 citation statements)

References 69 publications

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“…Table 2 shows the TC of Silver nano-particle-containing water as a function of nano-particle concentrations ranging from 1 to 8%. Silver nano-fluids' TC rises in a linear relationship with nano-particle concentration [30]. Table 3 shows the TC of water with 1-8 percent copper nanoparticles, as well as the correlation of consequences by hypothetical TC models [31].…”

Section: Table 1 Tc Of Nanofluids (Water + Aluminum)mentioning

confidence: 99%

Geometrical Analysis of the Thermal Conductivity of Nanofluids Using Different Models

Uddin¹,

Karim²,

Naime³

et al. 2021

JAMC

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Nanofluids (NF) have recently emerged as pioneers of standard heat transfer fluid augmentation or potential replacement. The potential for NFs to be employed in a wide range of technical applications, ranging from renewable energy to nanomedicine, have become one of today's most investigated issues. The widespread use of warmth to move liquids in modern applications emphasizes their critical role in the effectiveness of the system. The various methods for determining the thermal conductivity of NFs are explained. Using hypothetical thermal conductivity (TC) models like Hamilton and Crosser, Jeffrey, Maxwell, Davis, and Bruggeman, the heat conductivity of Water, Liquid Sodium, and Ethylene Glycol possessing unique concentrations for Copper, Aluminum and Silver nanoparticles are investigated in this study. As a result, this study provides an overview of the most significant achievements and contentious discoveries in the field of NFs thermal conductivity. The findings reveal that when nanoparticles are fixed, the thermal conductivity of nanofluids increases.

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Section: Table 1 Tc Of Nanofluids (Water + Aluminum)mentioning

confidence: 99%

Geometrical Analysis of the Thermal Conductivity of Nanofluids Using Different Models

Uddin¹,

Karim²,

Naime³

et al. 2021

JAMC

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“…For instance, Sarafraz et al [4] studied the utilization of liquid metal nano-suspension in a rectangular microchannel with the view to develop a new insight for the fabrication of solar thermal receiver working with liquid metals. Also, Nikkhah and Nakhjavani [5] investigated the heat-transfer characteristics of zirconia nanofluid in micro-heat exchangers employed for micro-electronic cooling applications, while Sadeghinezhad et al [6] studied the performance of turbulent heat transfer of graphene nanofluids in horizontal stainless-steel tubes. Additionally, Abdel Hafiz et al [7] investigated the heat-transfer characteristics of graphene nanoplatelets/water nanofluid in a micro-heat exchange.…”

Section: Introductionmentioning

confidence: 99%

Heat‐transfer and hydrodynamic performance investigation of graphene‐titanium dioxide composite nanofluid in micro‐heat exchangers

et al. 2021

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Nanofluids have made a breakthrough contribution toward maximizing the efficiency of heat exchangers. Consequently, graphene nanofluids have attracted significant attention, as they yield the best heat-transfer enhancement among all nanofluids; however, graphene is highly expensive, and further studies on hybrid graphene nanofluids are required to optimize costs. Research has been performed on the performance of pure graphene nanofluids, though little has been conducted on hybrid graphene nanofluids. Therefore, we investigated the hydrodynamic and convective heat-transfer performance of graphene-titanium dioxide composite (GTNC) nanofluid in a micro-heat exchanger, and compared the results with the performance of pure graphene and pure titanium dioxide nanofluids under similar conditions.Herein, we report the synthesis of GTNC using our novel green microsynthesis technique and the preparation of graphene, titanium dioxide, and GTNC nanofluids using a two-step method at three concentrations (0.02$0.08 wt%) using a surfactant. Furthermore, the stability and thermophysical properties of nanofluids were investigated, and nanofluids were studied for their effect on the performance of a counter-current laminar flow micro-heat exchanger at different flow rates (Re = 750-1460). Findings show that thermal conductivity enhancement of GTNC nanofluid and pure graphene nanofluid at the highest mass fraction (0.08%) was 25.8% and 31.6%, respectively, while the maximum enhancement of convective heat-transfer coefficient was 64.6% and 87%, respectively. These results indicate that hybrid GTNC nanofluid showed proximate thermal performance and stability level to graphene nanofluid with 50% less graphene content, which improves the economics of the process.

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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%

“…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. Nikkhah and Nakhjavani 42,43 experimentally measured the effect of nanoparticle concentration (0.1-0.3wt.%) and volume flow rate (1-5l/min) on fluid flow and heat transfer characteristics of ZrO 2 /water nanofluid flowing in a MCHS (200μm×200μm,L=50mm and N = 25) at different heat fluxes ranging from 10kW/m2 to 70kW/m2. The results showed that the maximum enhancements in friction factor and average HTC were achieved up to 13.9% and 17.…”

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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Thermal performance of a micro heat exchanger (MHE) working with zirconia-based nanofluids for industrial cooling

Cited by 21 publications

References 69 publications

Geometrical Analysis of the Thermal Conductivity of Nanofluids Using Different Models

Geometrical Analysis of the Thermal Conductivity of Nanofluids Using Different Models

Heat‐transfer and hydrodynamic performance investigation of graphene‐titanium dioxide composite nanofluid in micro‐heat exchangers

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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