An experimental determination of thermal conductivity and viscosity of BioGlycol/water based TiO2 nanofluids

Abdolbaqi, M.Kh.; Sidik, Nor Azwadi Che; Aziz, Arshad; Mamat, Rizalman; Azmi, W.H.; Yazid, Mohammad Noor Afiq Witri Muhammad; Najafi, G.

doi:10.1016/j.icheatmasstransfer.2016.07.007

Cited by 78 publications

(22 citation statements)

References 76 publications

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“…And it has been validated for Al 2 O 3 , CuO, and TiO 2 nanofluids.Azmi et al [78]2012 This model has been validated for water based Al 2 O 3 , ZnO, and TiO 2 nanofluids.Applied range: φ < 4%, 20 nm < d < 150 nm, 293 K < T < 343 K.Reddy and Rao [88]2013 k nf = k f ( a + bφ )Regression constants a and b at various temperatures for water, 40%:60% and 50%:50% EG/W.It is a fitted expression for TiO 2 nanofluids.Applied range: 30 °C < T < 70 °C,0.2% < φ < 1%.Zerradi et al [79]2014 k nf = k s + k b where ψ is a shape factor defined by for cylindrical particles ψ = 2 φ 0.2 for spherical particles α , β , and χ are thermophysic coefficients.This model is based on the Monte Carlo simulation combined with a new Nusselt number correlation. It has been validated for Al 2 O 3 –H 2 O, CuO–H 2 O, TiO 2 –H 2 O, and CNT–H 2 O nanofluids.Abdolbaqi et al [80]2016 It is nonlinear model for BioGlycol/water-based TiO 2 nanofluids based on the aggregation theory using analysis of variance. Applied temperature range: 30 °C < T < 80 °C.Shukla et al [74]2016 where ψ is the sphericity of nanoparticle.This model considers Brownian motion.…”

Section: Application In Enhancing the Thermal Conductivitymentioning

confidence: 99%

Toward TiO2 Nanofluids—Part 2: Applications and Challenges

Yang

2017

Nanoscale Res Lett

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The research about nanofluids has been explosively increasing due to their fascinating properties in heat or mass transportation, fluidity, and dispersion stability for energy system applications (e.g., solar collectors, refrigeration, heat pipes, and energy storage). This second part of the review summarizes recent research on application of TiO2 nanofluids and identifies the challenges and opportunities for the further exploration of TiO2 nanofluids. It is expected that the two exhaustive reviews could be a helpful reference guide for researchers to update the knowledge on research status of TiO2 nanofluids, and the critical comments, challenges, and recommendations could be useful for future study directions.

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Section: Application In Enhancing the Thermal Conductivitymentioning

confidence: 99%

Toward TiO2 Nanofluids—Part 2: Applications and Challenges

Yang

2017

Nanoscale Res Lett

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“…Compared to the pure EG uid, the unchanged viscosity of rGO-EG uid is due to both the low loading of rGO and its homogenous dispersion within EG. As described by eqn (4), the viscosity of the mixture system can be calculated by the classical Einstein theory: 50 h ¼ h 0 (1 + 2.54)…”

Section: Thermophysical Properties Of Rgo-eg Uidsmentioning

confidence: 99%

Ethylene glycol-based solar-thermal fluids dispersed with reduced graphene oxide

Shu

Zhang

et al. 2019

RSC Adv.

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“…The thermal conductivity improvement of 20% for paraffin nanofluids at 0.10 vol % was observed by comparing them to a base fluid at room temperature. The thermophysical behavior of TiO 2 nanoparticles dispersed within various mixtures of bio-glycol and water (20:80% and 30:70% by volume) were studied by Sidik et al [35]. The experiments conducted over temperature ranges from 30 and 80 • C, and at 0.5 and 2.0 vol % were performed.…”

Section: Introductionmentioning

confidence: 99%

Tribological and Thermal Transport Performance of SiO2-Based Natural Lubricants

2019

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Fluids and lubricants are critical for the mechanical manufacturing processing of metals, due to a high amount of friction generated, also reflected as heat, could wear and damage tooling and machine components. The proper application of lubricants increases machinery lifetime, decreases long-term costs, and energy and time consumption due to the maintenance or components exchange/repairs. Besides being non-renewable, mineral oils bring consequences to the environment due to their low biodegradability and could affect the user with respiratory and skin diseases. Recently, due to an increase in environmental awareness, the search of biocompatible and efficient lubricants has become a technology goal. The vegetable oil-based lubricants are slowly emerging as ecofriendly and high-performance alternatives to petroleum-based lubricants. This study evaluates soybean, sunflower, corn and paraffinic oils reinforced with SiO2 nanoparticles. The thermal and tribological evaluations were performed varying the temperature and nanofiller concentrations. The thermal conductivity improvements were observed for all nanolubricants as the temperature and filler fraction increased. The highest thermal conductivities were observed at 323 K with 0.25 wt % SiO2. The soybean and corn oils unveiled a maximum enhancement of ~11%. The tribological evaluations showed that SiO2 addition, even in small concentration, resulted into a significant improvement on a load-carrying capacity. For instance, at 0.25 wt % enhancements of 45% and 60% were observed for soybean and sunflower oils, respectively. The coefficient of friction performance also showed enhancements between 10% and 26%.

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An experimental determination of thermal conductivity and viscosity of BioGlycol/water based TiO2 nanofluids

Cited by 78 publications

References 76 publications

Toward TiO2 Nanofluids—Part 2: Applications and Challenges

Toward TiO2 Nanofluids—Part 2: Applications and Challenges

Ethylene glycol-based solar-thermal fluids dispersed with reduced graphene oxide

Tribological and Thermal Transport Performance of SiO2-Based Natural Lubricants

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