Ethylene- and Propylene-Glycol Based Nanofluids: A Litterature Review on Their Thermophysical Properties and Thermal Performances

Sekrani, Ghofrane; Poncet, Sébastien

doi:10.3390/app8112311

Cited by 52 publications

(31 citation statements)

References 80 publications

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“…Or the final formula for calculating the turbulent viscosity of the coolant, taking into account the formula (6), is written in the form 9:…”

Section: Analysis Of the Forces Acting On The Nanoparticle Based On mentioning

confidence: 99%

“…These include ethylene, propylene and di-propylene glycols of various concentrations in water. Also, nanofluids are widely used to increase the efficiency of heat exchange apparatuses as additives to heat carriers [6,7]. Some scientific works are devoted to mating combinations of various methods of enhancing heat transfer in heat exchangers, for example, using nanofluids simultaneously with spiral twists [8,9], using nanopowders with ethylene or propylene glycol additives to water [10].…”

Section: Introductionmentioning

confidence: 99%

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A New Universal Numerical Equation and a New Method for Calculating Heat-Exchange Equipment Using Nanofluids

Bіlonoga¹,

Stybel²,

Maksysko³

et al. 2020

IJHT

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This article analyzes the vast material of works devoted to the use of nanofluids in heat exchange equipment. It is proved that the use of the classical theories and equations for calculating the viscosities and thermal conductivities of nanofluids is not correct, since it does not coincide with the experimental results of most independent authors. A model of the chaotic motion of a nanoparticle is presented taking into account surface tension forces in a liquid coolant. The experimental results of the work of Malaysian and Iran authors on the effect of TiO2 nanoparticles with a concentration of 0.5%; 1.0% and 1.5% in the main liquid solution of ethylene glycol (EG) in water in a volume ratio of 40:60% in terms of heat transfer coefficient are compared with our theoretical studies. The results of the experiments presented in: an increase in heat transfer coefficients by 9.72%, 22.75%, 28.92% for 1.5% volume concentration of TiO2 nanoparticles at a coolant temperature of 30℃, 50℃, 70℃, respectively. Our theoretical result: increase in the obtained heat transfer coefficients by 9.79%, 22.22%, 29.09% according to our formulas (9, 10, 15) for calculating turbulent viscosities and thermal conductivities, which takes into account the effect of surface tension forces on the total flow of nanofluids in the channels of heat exchange equipment. A new method for calculating heat exchange equipment using nanofluids is presented, taking into account the action of surface tension forces, as well as predetermining the calculation of turbulent viscosities and thermal conductivity of nanofluids. A theoretical calculations a plate heat exchangers for a technological task performed by classical and new method is presented. Similar results were obtained, which differ by about 0.5 of a percent. The plate heat exchanger was calculated using a new method using TiO2 nanoparticles in water and in a mixture of EG in water in a ratio of 40:60%, as well as when pumpkin vegetable oil was added to milk with the optimal concentration.

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“…Or the final formula for calculating the turbulent viscosity of the coolant, taking into account the formula (6), is written in the form 9:…”

Section: Analysis Of the Forces Acting On The Nanoparticle Based On mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Universal Numerical Equation and a New Method for Calculating Heat-Exchange Equipment Using Nanofluids

Bіlonoga¹,

Stybel²,

Maksysko³

et al. 2020

IJHT

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show abstract

“…Chiam et al [16] have developed correlations for the thermal conductivity and dynamic viscosity for Al 2 O 3 nanoparticles dispersed in water and EG mixtures with ratio of 40:60, 50:50 and 60:40 (by volume) as a function of nanoparticle concentration, temperature and nanoparticle diameter. Recently, Sekrani and Poncet [17] reviewed studies on the thermophysical properties and performances of EG or propylene-glycol (PG)-based nanofluids.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Empirical Correlations of Viscosity and Thermal Conductivity of Water-Ethylene Glycol-Al2O3 Nanofluids

2020

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Because of their superb thermal conductivity, nanofluids are seen as new generation of cooling mediums in many engineering applications. It is well established that even a small amount of nanoparticles mixed with a base fluid may result in distinct thermal conductivity enhancement. On the other hand, addition of nanoparticles to the base fluid results in its substantial viscosity increase. Therefore, it is very difficult to evaluate the relative importance of viscosity and thermal conductivity of the nanofluid on convective heat transfer performance. In order to estimate such resultant impact properly, it is necessary to develop reliable correlation equations for predictions of these two thermophysical properties of nanofluids. In this paper, the thermal conductivity and dynamic viscosity of five fluids, i.e., pure water, ethylene glycol (EG) and three mixtures of water and EG with volume ratio of 40:60, 50:50 and 60:40 have been experimentally determined. The aforementioned fluids served as base fluids in nanofluids with Al2O3 nanoparticles at the concentration of 0.01%, 0.1% and 1% by weight. A set of 20 correlations for prediction of thermal conductivity and dynamic viscosity of base fluids and corresponding nanofluids has been developed. Moreover, present results have been confronted with literature data and predictions made by use of carefully selected recognized literature correlations.

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“…It was observed that the specific heat of the nanofluid was significantly enhanced by the presence of the graphite nanoparticles. G. Sekrani and S. Poncet [17] reviewed the possible use of ethylene-and propylene-glycol based nanofluids for applications in various thermal systems. These nanofluids can be applied by lowering the freezing point to prevent ice formation, such as in refrigeration systems, or pushing beyond the boiling point, such as in radiators or heat exchangers.…”

Section: Current Advances In the Applications Of Nanofluidsmentioning

confidence: 99%

Special Issue on Nanofluids and Their Applications

Yeoh

Cheung

2019

Applied Sciences

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Ethylene- and Propylene-Glycol Based Nanofluids: A Litterature Review on Their Thermophysical Properties and Thermal Performances

Cited by 52 publications

References 80 publications

A New Universal Numerical Equation and a New Method for Calculating Heat-Exchange Equipment Using Nanofluids

A New Universal Numerical Equation and a New Method for Calculating Heat-Exchange Equipment Using Nanofluids

A Comparison of Empirical Correlations of Viscosity and Thermal Conductivity of Water-Ethylene Glycol-Al2O3 Nanofluids

Special Issue on Nanofluids and Their Applications

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