A comprehensive review of last experimental studies on thermal conductivity of nanofluids

Bashirnezhad, Kazem; Rashidi, Majid; Yang, Zhigang; Bazri, Shahab; Yan, Wei‐Mon

doi:10.1007/s10973-015-4820-9

Cited by 95 publications

(35 citation statements)

References 56 publications

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“…While it is clear that an increase in thermal conductivity of a nanofluid will increase heat transfer through the fluid and therefore improves the heat transfer coefficients161718, it is difficult to directly relate an improvement in thermal conductivity of a nanofluid to an increase in specific heat19. An increase in the specific heat of a nanofluid is advantageous in thermal storage and heat transfer applications, because it increases the amount of energy stored or absorbed per unit mass.…”

mentioning

confidence: 99%

Increased Thermal Conductivity in Metal-Organic Heat Carrier Nanofluids

Nandasiri

Liu

McGrail

et al. 2016

Sci Rep

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Metal-organic heat carriers (MOHCs) are recently developed nanofluids containing metal-organic framework (MOF) nanoparticles dispersed in various base fluids including refrigerants (R245Fa) and methanol. Here, we report the synthesis and characterization of MOHCs containing nanoMIL-101(Cr) and graphene oxide (GO) in an effort to improve the thermo-physical properties of various base fluids. MOHC/GO nanocomposites showed enhanced surface area, porosity, and nitrogen adsorption compared with the intrinsic nanoMIL-101(Cr) and the properties depended on the amount of GO added. MIL-101(Cr)/GO in methanol exhibited a significant increase in the thermal conductivity (by approximately 50%) relative to that of the intrinsic nanoMIL-101(Cr) in methanol. The thermal conductivity of the base fluid (methanol) was increased by about 20%. The increase in the thermal conductivity of nanoMIL-101(Cr) MOHCs due to GO functionalization is explained using a classical Maxwell model.

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confidence: 99%

Increased Thermal Conductivity in Metal-Organic Heat Carrier Nanofluids

Nandasiri

Liu

McGrail

et al. 2016

Sci Rep

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“…The volume concentration (ϕ) of nanofluids can be estimated from Eq. (1) [32]. For a known volume concentration, and using the density from Table 1, Eq.…”

Section: Experimental Setup Preparation Of Nanolubricantsmentioning

confidence: 99%

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Haque¹,

Bakar²,

Kadirgama³

et al. 2016

J. Mech, Eng, Sci.

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The performance of a domestic refrigerator with the addition of nanoparticles in the lubricant was experimentally investigated. Different sizes of nanoparticles of Al2O3 and TiO2 were added to the polyolester (POE) oil in two different volume concentrations (0.05 and 0.1 vol.%). Energy consumption tests and freeze capacity tests were then performed on the refrigerator. The investigation results showed that the refrigerator worked normally and safely with the nanolubricants. The results of the experiments indicated that the refrigerator performed better with nanolubricants as compared to pure POE oil. The COP of the systems was increased by 19% and 22% when 0.05% and 0.1% Al2O3 nanoparticles were added to the POE oil respectively. The system with 0.1% volume concentration of Al2O3 and TiO2 nanoparticles added to the POE oil consumed 27.73% and 14.19% less energy as compared to the pure POE oil system. Hence, this study showed that the addition of nanoparticles in the lubricant oil of the refrigerator is practical and it enhanced the performance of the refrigerator

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“…Theoretical investigation on the effects of nanofluids has been systematically reported and well documented, which can be found in the open literature [11][12][13][14][15][16]. In addition, rigorous readers can find a comprehensive review of the last experimental studies on nanofluids in the literature such as [17,18].…”

Section: List Of Symbolsmentioning

confidence: 99%

Different modes of nanoparticle migration at mixed convection of Al2O3–water nanofluid inside a vertical microannulus in the presence of heat generation/absorption

Moshizi

Malvandi

2016

J Therm Anal Calorim

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Intensity and direction of nanoparticle migration are able to tune thermophysical properties of nanofluids to improve the thermal performance of heat exchange equipments. The intensity strongly depends on nanoparticle diameter and cannot be actively controlled while different directions of nanoparticle migration are achieved with asymmetric heating. In the current study, the mixed convective heat transfer of Al 2 O 3 -water nanofluid inside a vertical microannulus is investigated theoretically considering different modes of nanoparticle migration. The model employed for the nanoparticle-fluid mixture is able to fully account for the effects of nanoparticle slip velocity relative to the base fluid originating from the thermophoresis (nanoparticle slip velocity due to temperature gradient) and Brownian motion (nanoparticle slip velocity due to concentration gradient). To consider surface roughness in the microannulus, Navier's wall slip condition is employed at the solid-fluid interface. It is revealed that the asymmetric heating at the walls alters the orientation of nanoparticle migration and deforms the symmetry of the flow field. In addition, despite temperature-dependent buoyancy forces, concentration-dependent buoyancy forces have considerable effects on the flow fields and nanoparticle migration.

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A comprehensive review of last experimental studies on thermal conductivity of nanofluids

Cited by 95 publications

References 56 publications

Increased Thermal Conductivity in Metal-Organic Heat Carrier Nanofluids

Increased Thermal Conductivity in Metal-Organic Heat Carrier Nanofluids

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Different modes of nanoparticle migration at mixed convection of Al2O3–water nanofluid inside a vertical microannulus in the presence of heat generation/absorption

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