Thermophysical and rheological properties of hybrid nanofluids: a review on recent studies

Parashar, Naman; Yahya, Syed Mohd

doi:10.1007/s10973-021-10854-8

Cited by 6 publications

(2 citation statements)

References 164 publications

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“…Single nanofluids can also alter their properties by modifying various factors such as nanoparticle size, shape, concentration, temperature, pH, surfactant, and ultrasonic time. However, hybrid nanofluids have more parameters to consider, such as the relative diameter and the mixing ratio of nanoparticles [ 14 , 15 , 16 , 17 ]. According to Singh et al [ 18 ], in Al 2 O 3 nanofluids, the lower the surface potential, the easier it is to cause particle aggregation and precipitation.…”

Section: Introductionmentioning

confidence: 99%

Properties Related to the HLB Value of Hybrid Thermoelectric Nanofluids at Different Temperatures

Wang,

Wang

2024

Polymers

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This article aims to explore the impact of HLB (Hydrophile-Lipophile Balance) values on two key properties, namely the thermoelectric conductivities and the stability of the suspension, of a hybrid nanofluid composed of TiO2 and CuO nanoparticles. The present study employed a two-step synthesis method to prepare the polymeric nanofluid, which meant that the nanoparticles were mixed with the base fluid using an ultrasonic oscillator, which was easier and cheaper than the one-step synthesis method. To ensure that the nanoparticles remain evenly dispersed in the base fluid, two distinct polymer-emulsifier combinations with different HLB values were employed as the dispersing agents. The first pair of polymeric emulsifiers consisted of Span#20 and Tween#20, and the second pair was Span#80 and Tween#80 composed to four HLB values of 12, 13, 14, and 15. The experiment measured the properties of the nanofluid, including the particle size, Zeta potential, and thermoelectric conductivities at different temperatures from 20 °C to 50 °C. The experimental outcomes indicated that an HLB value of 13 was the best for the two sets of polymeric emulsifiers tested. This value corresponded to the most reduced particle size, measured at 170 nm, alongside the most elevated Zeta potential, recorded at −30 mV. Additionally, this HLB value was associated with the peak thermoelectric conductivity, which was 1.46 W/m∙K. This suggests that there may be some variation in the best HLB value depending on the type of polymeric emulsifiers and the temperature of the hybrid nanofluid.

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Section: Introductionmentioning

confidence: 99%

Properties Related to the HLB Value of Hybrid Thermoelectric Nanofluids at Different Temperatures

Wang,

Wang

2024

Polymers

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“…Due to their superior properties, nanomaterials dispersed in colloidal suspensions provide a remarkable improvement in the thermal and optical properties of NFs. Different types of metals, metal-oxides, carbon-based nanotubes (CNT), and two-dimensional (2D) graphene NPs are extensively utilized for NF formulation [ 15 , 16 , 17 ]. Among the wide range of NPs, carbon-based materials exhibit greater effectiveness because of their larger surface area and chemical structure relative to non-carbon-based particles [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Insight into the Investigation of Diamond Nanoparticles Suspended Therminol®55 Nanofluids on Concentrated Photovoltaic/Thermal Solar Collector

et al. 2022

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Nanofluids are identified as advanced working fluids in the solar energy conversion field with superior heat transfer characteristics. This research work introduces carbon-based diamond nanomaterial and Therminol®55 oil-based nanofluids for implementation in a concentrated photovoltaic/thermal (CPV/T) solar collector. This study focuses on the experimental formulation, characterization of properties, and performance evaluation of the nanofluid-based CPV/T system. Thermo-physical (thermal conductivity, viscosity, and rheology), optical (UV-vis and FT-IR), and stability (Zeta potential) properties of the formulated nanofluids are characterized at 0.001–0.1 wt.% concentrations of dispersed particles using experimental assessment. The maximum photo-thermal energy conversion efficiency of the base fluid is improved by 120.80% at 0.1 wt.%. The thermal conductivity of pure oil is increased by adding the nanomaterial. The highest enhancement of 73.39% is observed for the TH-55/DP nanofluid. Furthermore, dynamic viscosity decreased dramatically across the temperature range studied (20–100 °C), and the nanofluid exhibited dominant Newtonian flow behavior, with viscosity remaining nearly constant up to a shear rate of 100 s−1. Numerical simulations of the nanofluid-operated CPV/T collector have disclosed substantial improvements. At a concentrated solar irradiance of 5000 W/m2 and an optimal flow rate of 3 L/min, the highest thermal and electrical energy conversion efficiency enhancements are found to be 11 and 1.8%, respectively.

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An overview of vapor compression refrigeration system performance enhancement mechanism by utilizing nanolubricants

Nugroho

Mamat

Zhang

et al. 2022

J Therm Anal Calorim

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Thermophysical and rheological properties of hybrid nanofluids: a review on recent studies

Cited by 6 publications

References 164 publications

Properties Related to the HLB Value of Hybrid Thermoelectric Nanofluids at Different Temperatures

Properties Related to the HLB Value of Hybrid Thermoelectric Nanofluids at Different Temperatures

Insight into the Investigation of Diamond Nanoparticles Suspended Therminol®55 Nanofluids on Concentrated Photovoltaic/Thermal Solar Collector

An overview of vapor compression refrigeration system performance enhancement mechanism by utilizing nanolubricants

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