Thermal conductivity, viscosity and rheology of a suspension based on Al 2 O 3 nanoparticles and mixture of 90% ethylene glycol and 10% water

Serebryakova, M.A.; Dimov, S. V.; Бардаханов, С. П.; Новопашин, С. А.

doi:10.1016/j.ijheatmasstransfer.2014.12.002

Cited by 40 publications

(11 citation statements)

References 32 publications

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“…The densities we measured in experiments are in good agreement with the results predicted by Eq. (14). And they are decrease with increasing temperature as expected.…”

Section: Thermal Physical Propertiessupporting

confidence: 75%

“…In their work, viscosity enhancement was in the range of 18.1%-300% for mass concentration and temperature were in the range of 3%-50% and 293-313K, respectively. Serebryakova et al [14] experimental studied thermal conductivity and viscosity of nanofluids, based on nanoparticles were planned to see if the same behavior was observed. As a result, this paper aims at studying the heat transfer of ZnO/EG-W nanofluids flow through the inner tube, which is heated by circulating heating water through the annulus section.…”

Section: Introductionmentioning

confidence: 90%

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Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition flow

Fernández-Seara

et al. 2016

Applied Thermal Engineering

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“…The densities we measured in experiments are in good agreement with the results predicted by Eq. (14). And they are decrease with increasing temperature as expected.…”

Section: Thermal Physical Propertiessupporting

confidence: 75%

Section: Introductionmentioning

confidence: 90%

Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition flow

Fernández-Seara

et al. 2016

Applied Thermal Engineering

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“…Comparing Figure S1, Supporting Information, and Figure 2a, we can see that ethylene glycol resulted in a much smaller bismuth nitrate particle size (≈80 nm) and a better uniformity than acetone did, which might be ascribed to the surfactant effect of ethylene glycol that prevented the aggregation of bismuth nitrate particles. [ 41,42 ] In addition, bismuth nitrate particles almost fully covered carbon fiber surfaces so that high‐density nano‐sized bismuth oxides (≈35 nm) can be formed on carbon fiber surfaces after decompositions of bismuth nitrate particles, as shown in Figure 2b. With the nano‐sized bismuth oxides that distributed uniformly on carbon fiber surfaces, the bismuth nanosphere semi‐embedded carbon felt with the elaborate nanoparticle spatial arrangement can be fabricated by the carbothermic reaction.…”

Section: Resultsmentioning

confidence: 99%

Densely Populated Bismuth Nanosphere Semi‐Embedded Carbon Felt for Ultrahigh‐Rate and Stable Vanadium Redox Flow Batteries

Zhou

Zhang

et al. 2020

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The elaborate spatial arrangement and immobilization of highly active electrocatalysts inside porous substrates are crucial for vanadium redox flow batteries capable of high‐rate charging/discharging and stable operation. Herein, a type of bismuth nanosphere/carbon felt is devised and fabricated via the carbothermic reduction of nanostructured bismuth oxides. The bismuth nanospheres with sizes of ≈25 nm are distributed on carbon fiber surfaces in a highly dispersed manner and its density reaches up to ≈500 pcs µm−2, providing abundant active sites. Besides, a unique bismuth nanosphere semi‐embedded carbon fiber structure with strong interfacial BiC chemical bonding is spontaneously formed during carbothermic reactions, offering an excellent mechanical stability under flowing electrolytes. It shows that the bismuth nanosphere semi‐embedded carbon felt can effectively promote V(II)/V(III) redox reactions with appreciable catalytic activity. The battery with the present electrode sustains an energy efficiency of 77.1 ± 0.2% and an electrolyte utilization of 57.2 ± 0.2% even when a current density up to 480 mA cm−2 is applied, which are remarkably higher than those of batteries with the bismuth nanoparticle/carbon felt synthesized by the electrodeposition method (62.6 ± 0.1%, 23.6 ± 0.2%). Further, the battery with the present electrode demonstrates a stable energy efficiency retention of 98.2% after 1000 cycles.

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“…They indicated that overall heat transfer coefficient improved between 4.6-10% by using Al2O3/water nanofluid. In another study, Serebryakova et al (2015) tested a hybrid base fluid (ethylene glycol and water) and alumina nanoparticles at the rate of 1.5% to constitute a new nanofluid. They investigated the increment in thermal conductivity of this nanofluid, when it is used as working fluid in heat transfer applications.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement

Sözen

Khanları

Çiftçi

2019

Int. J. Renew. Energy Dev.

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Plate heat exchangers, a compact-type heat exchanger, are commonly used heat transfer devices because of their superior characteristics. Their thermal performances are strongly dependent to working fluid circulating inside the system. The influences of nanofluid utilization as the working fluid in a plate heat exchanger was experimentally and numerically analysed in this study. In order to show off the improvement rate in heat transfer, the experiments were performed by using deionized water and TiO2-deionized water nanofluid. The nanofluid was prepared at the rate of 1.5 % as weighted. A surface-active agent, Triton X-100, was also doped into the mixture at the rate of 0.2% of a final concentration to prevent the sedimentation and flocculation of the nanoparticles inside the solution. The experiments were performed in different temperatures as 40°C, 45°C, 50°C and varying cold fluid mass flow rates as 3,4, 5, 6 and 7 lpm. In addition, using the experimental data, a numerical simulation was realized by ANSYS Fluent software. The both results indicate that heat transfer rate in plate heat exchanger can be improved using nanofluid as the working fluid in place of deionized water. The maximum improvement rate in heat transfer was obtained as 11 % in experimental study. It is also seen that experimental and numerical results are in good agreement.©2019. CBIORE-IJRED. All rights reservedArticle History: Received May 18th 2018; Received in revised form October 17th 2018; Accepted January 8th 2019; Available onlineHow to Cite This Article: Sözen, A., Khanlari, A., and Çiftçi, E. (2019) Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement. Int. Journal of Renewable Energy Development, 8(1), 27-32.https://doi.org/10.14710/ijred.8.1.27-32

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Thermal conductivity, viscosity and rheology of a suspension based on Al 2 O 3 nanoparticles and mixture of 90% ethylene glycol and 10% water

Cited by 40 publications

References 32 publications

Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition flow

Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition flow

Densely Populated Bismuth Nanosphere Semi‐Embedded Carbon Felt for Ultrahigh‐Rate and Stable Vanadium Redox Flow Batteries

Experimental and Numerical Investigation of Nanofluid Usage in a Plate Heat Exchanger for Performance Improvement

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