Experimental investigation on heat transfer performance of TiO 2 nanofluids in water–ethylene glycol mixture

Hamid, Khalid; Azmi, W.H.; Mamat, Rizalman; Sharma, K.V.

doi:10.1016/j.icheatmasstransfer.2016.02.009

Cited by 83 publications

(27 citation statements)

References 32 publications

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“…The base fluid consists of 20% of ethylene glycol and 80% of distilled water. The 20:80 EG/DW base Al 2 O 3 , ZrO 2 and CeO 2 nanofluids were prepared based on the two-step method [13,14]. The two step method technique was conducted as follow.…”

Section: Experimental Part Materials and Preparationmentioning

confidence: 99%

“…Thus, mixing the pure water with the ethylene glycol is always commercially recommended as heat transfer fluid in many systems to have a high ability for cooling or heating. Consequently, it is more reasonable that the mixture of ethylene glycol and pure water as a based fluid to the nanofluids has attracted much attention from scientific workers [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Other studies have focused on the analyses of different properties of nanofluides [21][22][23].…”

mentioning

confidence: 99%

“…Li and Zou [13] showed that the thermal conductivity of SiC at 1% concentration nanofluid increased by 33.8% than base fluid, while the viscosity increase by 22.4% at the same concentration. Hamid et al [14] stated that the thermal conductivity of TiO 2 based EG/W (40:60) increased by 7% when the concentration of the nanoparticles increased from 0.5 to 1.5%. Cabaleiro et al [15] reported that the temperature increases has a high effect on the density and viscosity of the acid-functionalized graphene nanoplatelets, but no enhancement was found for the thermal conductivity.…”

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confidence: 99%

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Experimental Investigation for the Thermo-physical Properties and Stability of CeO2, ZrO2, and Al2O3 Mixed with Ethylene Glycol and Distilled Water

Alfaryjat¹,

Stefanescu²,

Dobrovicescu³

2019

Rev.Chim.

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In this work, the effects of nanoparticles concentration on the density, thermal conductivity, and viscosity of Al2O3, CeO2 and ZrO2 suspended in 20% of ethylene glycol (EG) and 80% of distilled water (DW) is experimentally investigated. By using two step method, the nanofluid samples are provided at different concentrations, including 0.5%, 1% and 2 %. Visual observation of the nanofluid samples showed that CeO2-EG/DW and ZrO2-EG/DW have higher stability for one week more that Al2O3-EG/DW. The results indicate that the density, viscosity and thermal conductivity of the nanofluids increased with increasing the nanoparticles concentration. The highest enhancement of the thermal conductivity was found to be 9.6% for 2% concentration of CeO2-EG/DW at 25�C. Al2O3-EG/DW shows the lowest density and viscosity between all types of the nanofluids.

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Section: Experimental Part Materials and Preparationmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Experimental Investigation for the Thermo-physical Properties and Stability of CeO2, ZrO2, and Al2O3 Mixed with Ethylene Glycol and Distilled Water

Alfaryjat¹,

Stefanescu²,

Dobrovicescu³

2019

Rev.Chim.

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“…Hamid et al [1] experimentally found performance factor η ¼ h nf h bf ¼ h' and friction factor of TiO 2 nanofluids. Reynolds number, temperature, concentration and thermal properties have significant effect on the performance factor.…”

Section: Thermal Performance Enhancement By Using Tio 2 Nanoparticlesmentioning

confidence: 99%

“…We can convert weight concentration to volume concentration by using Eq. (1) Ø ¼ ωρ bf ½ð1 -0:01ωÞρ p þ 0:01ωρ bf (1) where ω is weight concentration, ρ bf is density of base fluid and ρ p is density of nanoparticles.…”

Section: Thermal Performance Enhancement By Using Tio 2 Nanoparticlesmentioning

confidence: 99%

Heat Transfer Applications of TiO2 Nanofluids

Ali¹,

Sajid²,

Arshad³

2017

Application of Titanium Dioxide

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To achieve acme heat transfer is our main disquiet in many heat transfer applications such as radiators, heat sinks and heat exchangers. Due to furtherance in technology, requirement for efficient systems have increased. Usually cooling medium used in these applications is liquid which carries away heat from system. Liquids have poor thermal conductivity as compared to solids. In order to improve the efficiency of system, cooling medium with high thermal conductivity should be used. Quest to improve thermal conductivity leads to usage of different methods, and one of them is addition of nanoparticles to base liquid. Application of nanofluids (a mixture of nanoparticles and base fluid) showed enhancement in heat transfer rate, which is not possible to achieve by using simple liquids. Different researchers used TiO 2 nanoparticles in different heat transfer applications to observe the effects. Addition of titanium oxide nanoparticles into base fluid showed improvement in the thermal conductivity of fluid. This chapter will give an overview of usage of titanium oxide nanoparticles in numerous heat transfer applications.

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Numerical simulation of nanofluids forced convection in a corrugated double‐pipe heat exchanger

Ding

Luo

et al. 2021

Can J Chem Eng

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In this study, the heat transfer and flow characteristics of TiO2‐H2O nanofluids with TiO2 mass fractions of 0.0, 0.1, 0.3, and 0.5 wt.% in corrugated and smooth double‐pipe heat exchangers were compared using numerical simulations. The results demonstrated that TiO2‐H2O nanofluids effectively enhanced the heat transfer compared to deionized water, and that the heat exchange capacity gradually increased with the TiO2 mass fraction. The corrugated pipe heat exchanger disturbed the fluid flow on both the shell side and pipe side, breaking the boundary layer and creating vortices in the corrugated zone. This provided a higher heat transfer capability than the smooth double‐pipe heat exchanger, but also increased the fluid flow resistance in the pipe. In general, the use of nanofluids and corrugated pipes was found to significantly improve the heat transfer efficiency of the double‐pipe heat exchanger.

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Experimental investigation on heat transfer performance of TiO 2 nanofluids in water–ethylene glycol mixture

Cited by 83 publications

References 32 publications

Experimental Investigation for the Thermo-physical Properties and Stability of CeO2, ZrO2, and Al2O3 Mixed with Ethylene Glycol and Distilled Water

Experimental Investigation for the Thermo-physical Properties and Stability of CeO2, ZrO2, and Al2O3 Mixed with Ethylene Glycol and Distilled Water

Heat Transfer Applications of TiO2 Nanofluids

Numerical simulation of nanofluids forced convection in a corrugated double‐pipe heat exchanger

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