Estimation of thermal conductivity of ethylene glycol-based nanofluid with hybrid suspensions of SWCNT–Al2O3 nanoparticles by correlation and ANN methods using experimental data

Esfe, Mohammad Hemmat; Rejvani, Mousa; Karimpour, Rostam; Arani, Ali Akbar Abbasian

doi:10.1007/s10973-016-6002-9

Cited by 129 publications

(16 citation statements)

References 69 publications

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“…It was suggested that the increase with temperature was a result of increased Brownian motion, while the increase with concentration was a result of the greater area for heat transfer and possible clustering of the nanoparticles. In the same way, Esfe et al [60] measured the thermal conductivity of SWCNT-Al 2 O 3 -water nanofluid. A non-linear increase with both temperature and concentration was observed, with a stronger dependence on temperature shown at higher nanoparticle concentrations.…”

Section: Effects Of Hybrid Nanoparticles On Nanofluid Thermal Conductmentioning

confidence: 92%

“…Experimental data has shown that similarly to nanofluids containing one type of nanoparticle, the thermal conductivity of hybrid nanofluids generally increases with temperature and nanoparticle volume concentration [59][60][61][62][63][64]. In many cases, researchers combined metal or metal-oxide nanoparticles with various types of carbon nanotubes [55,[59][60][61][62]65]. For example, using a KD2 Pro Thermal Properties Analyzer, Zadkhast et al [65] tested the thermal conductivity of CuO-MWCNT-water nanofluid.…”

Section: Effects Of Hybrid Nanoparticles On Nanofluid Thermal Conductmentioning

confidence: 99%

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Nanofluid Thermal Conductivity and Effective Parameters

et al. 2018

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Due to the more powerful and miniaturized nature of modern devices, conventional heat-transfer working fluids are not capable of meeting the cooling needs of these systems. Therefore, it is necessary to improve the heat-transfer abilities of commonly used cooling fluids. Recently, nanoparticles with different characteristics have been introduced to base liquids to enhance the overall thermal conductivity. This paper studies the influence of various parameters, including base liquid, temperature, nanoparticle concentration, nanoparticle size, nanoparticle shape, nanoparticle material, and the addition of surfactant, on nanofluid thermal conductivity. The mechanisms of thermal conductivity enhancement by different parameters are discussed. The impact of nanoparticles on the enhanced thermal conductivity of nanofluids is clearly shown through plotting the thermal conductivities of nanofluids as a function of temperature and/or nanoparticle concentration on the same graphs as their respective base liquids. Additionally, the thermal conductivity of hybrid nanofluids, and the effects of the addition of carbon nanotubes on nanofluid thermal conductivity, are studied. Finally, modeling of nanofluid thermal conductivity is briefly reviewed.

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Section: Effects Of Hybrid Nanoparticles On Nanofluid Thermal Conductmentioning

confidence: 92%

Section: Effects Of Hybrid Nanoparticles On Nanofluid Thermal Conductmentioning

confidence: 99%

Nanofluid Thermal Conductivity and Effective Parameters

et al. 2018

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“…Using a particular best combination of the nanoparticles, one can increase the k and others can reduce the viscosity compared to the nanofluids containing single nanoparticle. Some such hybrid nanofluids are found in the literature although there is still concern about the stability and enhancement in the P Pump of the hybrid nanofluids. The prime motive should be to find the cost‐to‐benefit feasible nanofluids based PV modules in different operating conditions to commercialize the cooling method in the SE industry.…”

Section: Discussionmentioning

confidence: 99%

Performance enhancement of photovoltaic modules by nanofluid cooling: A comprehensive review

2020

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Summary Only 15‐20% of solar radiation incident on the photovoltaic (PV) cells is utilized which further reduces due to the rise in the temperature of the PV module and it also degrades the lifespan of the PV module. Therefore, numerous attempts were made to reduce this rising temperature of the PV module and different cooling techniques were employed. Nanofluid cooling is one of the potential cooling techniques for lowering the temperature of the PV module and augmenting the heat transfer by increasing the thermal conductivity of the nanofluid relative to the base fluid (BF). The experimental and numerical studies related to the cooling of PV cells with nanofluids have been reviewed. It was found that the heat transfer from the back of the PV module is enhanced with the augmentation in the concentration of nanoparticle in BF; however, some studies also demonstrate that the enhancement in the heat transfer also depends upon other factors such as the geometry at the rear of the PV module, nanoparticle material, nanoparticle size, BF, ambient conditions, etc. This review article also demonstrates the various issues with nanofluids such as instability, technological difficulties, high system costs, and the impossibility of finding a viable operational design which creates a barrier in the commercialization of the nanofluid cooling technique for PV modules.

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“…It can be explained by a lack of reliable experimental data used to train, test, and validate ANNs. For ethylene-glycol-based nanofluids, one can cite only the works of Esfe et al on the thermal conductivity of suspensions with SWCNT-Al 2 O 3 nanoparticles [83] and on the thermal conductivity and dynamic viscosity of suspensions with Al 2 O 3 nanoparticles [84]. Similar studies must be generalized to other types of nanofluids to predict their thermal properties, as well as their performances in real applications.…”

Section: Research Perspectivesmentioning

confidence: 99%

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

Sekrani

Poncet

2018

Applied Sciences

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Nanofluids are considered a promising way to improve the heat transfer capability of base fluids. Water is the most commonly-used heat transfer fluid. However, in refrigeration systems, it may be necessary to mix water with either ethylene- or propylene-glycol to lower its freezing point and prevent from ice formation. In the same way, for car radiators or industrial heat exchangers, the boiling point of water can be pushed up by mixing it with glycol-based fluids. The increasing awareness of energy saving and industrial energy efficiency improvement results in the growing interest in ethylene- or propylene-glycol-based nanofluids for applications in various thermal systems. The present paper proposes an extensive review of the most recent and relevant experimental and numerical works on the thermophysical properties and performances of ethylene- or propylene-glycol-based nanofluids. Research perspectives are also provided with the long-term objective that these nanofluids be more widely considered in real industrial applications.

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Estimation of thermal conductivity of ethylene glycol-based nanofluid with hybrid suspensions of SWCNT–Al2O3 nanoparticles by correlation and ANN methods using experimental data

Cited by 129 publications

References 69 publications

Nanofluid Thermal Conductivity and Effective Parameters

Nanofluid Thermal Conductivity and Effective Parameters

Performance enhancement of photovoltaic modules by nanofluid cooling: A comprehensive review

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

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