Nanofluids: Key parameters to enhance thermal conductivity and its applications

Younes, Hammad; Mao, Mingyang; Murshed, S. M. Sohel; Lou, Ding; Hong, Haiping; Peterson, G. P.

doi:10.1016/j.applthermaleng.2022.118202

Cited by 111 publications

(39 citation statements)

References 344 publications

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“…Various measurement techniques are available to determine the effective thermal conductivity of nanofluids, such as the temperature oscillation technique, parallel steady‐state technique, thermal constants analyzer (TCA) technique, 3ω method, and the transient hot wire (THW) technique 9.…”

Section: Methodsmentioning

confidence: 99%

Experimental and Theoretical Investigations of the Thermal Conductivity of Erbium Oxide/Ethylene Glycol Nanofluids for Thermal Energy Applications

et al. 2022

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The thermal conductivity of Er2O3/ethylene glycol (EG) nanofluids was investigated at different concentrations of Er2O3 nanoparticles in the temperature range of 20–50 °C. The findings showed that the volume fraction of Er2O3 nanoparticles and temperature affect the thermal conductivity. The thermal conductivity increases with increasing Er2O3 concentration and temperature, and the Er2O3/EG nanofluid showed higher thermal conductivity than the base fluid. Precise correlations are proposed to forecast the thermal conductivity of the Er2O3/EG nanofluid relative to the base fluid. These results are promising for using Er2O3/EG nanofluid in solar thermal applications.

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Section: Methodsmentioning

confidence: 99%

Experimental and Theoretical Investigations of the Thermal Conductivity of Erbium Oxide/Ethylene Glycol Nanofluids for Thermal Energy Applications

et al. 2022

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“…Under turbulent flow conditions, this criterion considers four characteristics of nanofluids: thermal conductivity, specific heat capacity, density, and dynamic viscosity. The Mouromtseff criteria is depicted in Equation (7). The Mouromtseff criteria shows that the efficiency of CF-GNPs in different mass percentages is higher than 1.…”

Section: Data Reduction and Uncertaintiesmentioning

confidence: 99%

“…As a result, researchers seek an alternate mechanism to replace these traditional fluids to improve thermal transfer efficiency. "Nanofluids" are solid nanoparticles (NPs) suspended in base fluids in a long-stable and homogeneous approach [6][7][8]. Nanofluids have previously been shown to improve heat transfer efficiency in a variety of engineering applications [9], including heat exchangers [10], heating/cooling systems [11], and solar panel appliances [6].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis of Graphene-Based Nanofluids for Energy System and Economic Feasibility

Mohammad

Aldlemy

Ahmed

et al. 2022

Journal of Nanomaterials

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Graphene has piqued the interest of many researchers due to its superior mechanical, thermal, and physiochemical properties. Graphene nanoplatelets with covalently functionalized surfaces (CF-GNPs) were employed in turbulent-heated pipes to undertake thermal and economic studies. CF-GNPs and distilled water were used to make the current nanofluids at various mass percentages, such as 0.025, 0.05, 0.075%, and 0.1 wt.%. In the range of 6,401 Re 11,907, the thermal system was heated up to 11,205 W/m2 under fully developed turbulent flow conditions. Field emission scanning electron microscopy (FE-SEM), zeta potential, nanoparticle sizer, and field emission transmission electron microscopy (FE-TEM) were used to examine the morphological features and characterise the particles. In addition, the current thermal system’s economic performance was assessed to estimate its price-to-operate ratio. There was a 16.10% reduction in heat exchanger size for 0.025 weight percent, 0.05 weight percent, 0.075 weight percent, and 0.1 weight percent. In addition, the power needed for the base fluid was 422 W, which was then lowered to 354 W, 326 W, 315 W, and 298 W for 0.025 wt.%, 0.05 wt.%, 0.075 wt.%, and 0.1 wt.%, respectively.

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“…As was stated earlier, the dispersion of particles with high thermal conductivity can elevate the low thermal conductivity of PCMs. While the addition of milli- or micrometer-sized particles can lead to sedimentation of the particles, due to their relatively small surface area and large size, smaller-sized nanomaterials (NMs) additives have properly settled this issue [ 25 ]. Even though nanomaterials have widespread application and many advantages in the industry [ 26 , 27 ], some research studies have discussed alarming health problems that might be caused by some of these NMs.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Carbon-Based Nanomaterials and Plate-Fin Networks in a Cold PCM Container with Application in Air Conditioning of Buildings

et al. 2022

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Cold energy storage devices are widely used for coping with the mismatch between thermal energy production and demand. These devices can store cold thermal energy and return it when required. Besides the countless advantages of these devices, their freezing rate is sluggish, therefore researchers are continuously searching for techniques to improve their operating speed. This paper tries to address this problem by simultaneously combining a network of plate fins and various types of carbon-based nanomaterials (NMs) in a series of complex computational fluid dynamics (CFD) simulations that are validated by published experimental results. Horizontal, vertical, and the combination of these two plate-fin arrangements are tested and compared to the base model. Subsequently, several carbon-based NMs, including SWCNT, MWCNT, and graphene-oxide NMs are utilized to further improve the process. The influence of these fin networks, nanoparticle types, and their volume- and mass-based concentrations within the PCM container are studied and discussed. According to the results, carbon-based NMs exhibit superior performance compared to metal-oxide NMs, so that at identical NM volume and mass fractions, MWCNT particles present a 2.77% and 17.72% faster freezing rate than the CuO particles. The combination of plate-fin network and MWCNT particles is a promising technique that can expedite the ice formation rate by up to 70.14%.

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Nanofluids: Key parameters to enhance thermal conductivity and its applications

Cited by 111 publications

References 344 publications

Experimental and Theoretical Investigations of the Thermal Conductivity of Erbium Oxide/Ethylene Glycol Nanofluids for Thermal Energy Applications

Experimental and Theoretical Investigations of the Thermal Conductivity of Erbium Oxide/Ethylene Glycol Nanofluids for Thermal Energy Applications

Thermal Analysis of Graphene-Based Nanofluids for Energy System and Economic Feasibility

Utilization of Carbon-Based Nanomaterials and Plate-Fin Networks in a Cold PCM Container with Application in Air Conditioning of Buildings

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