Influence of nanoparticles size, per cent mass ratio, and temperature on the thermal properties of water-based MgO–ZnO nanofluid: an experimental approach

Giwa, Solomon O.; Momin, Marzia; Nwaokocha, Collins N.; Sharifpur, Mohsen; Meyer, Josua P.

doi:10.1007/s10973-020-09870-x

Cited by 30 publications

(14 citation statements)

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“…The impact of nanoparticle size (MgO—20 and 100 nm), temperature, and mixing ratio on the TC of DIW-based MgO and MgO–ZnO nanofluids (at 0.1 vol%) was conducted [ 43 ]. A decrease in the nanoparticle size of MgO was observed to intensity TC of MgO and MgO–ZnO nanofluids.…”

Section: Tc Enhancement Contributing Factorsmentioning

confidence: 99%

“…The influence of varying mixing ratio (20:80–80:20) and temperature (30–80 °C) on the TC of 1 vol% TiO 2 –SiO 2 /water–EG (60:40) nanofluid was found to improve this thermal property by 16% (peak) using mixing ratio of 20:80 at 80 °C [ 113 ]. The TC of 0.1 vol% MgO–ZnO/DIW nanofluids under the effect of changing mixing ratio and temperature was observed to be augmented by 15–22% using a mixing ratio of 40:60 (MgO–ZnO) at 50 °C [ 43 ]. The effect of the mixing ratio on the TC was observed to be higher than the temperature.…”

Section: Tc Enhancement Contributing Factorsmentioning

confidence: 99%

“…For the hybrid nanofluids, studies reported higher TC compared to those of mono-particle nanofluids [ 21 , 42 , 43 , 44 ]. Classical studies showed TC enhancement of 50–150% for the suspension of Al 2 Cu and Ag 2 Al in EG and water with concentrations of 0.2–1.5 vol% [ 21 ], while 27.8% improvement was recorded for 0.05 wt% MWCNT + 0.02 wt% Fe 2 O 3 /water nanofluid [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

et al. 2023

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Advancements in technology related to energy systems, such as heat exchangers, electronics, and batteries, are associated with the generation of high heat fluxes which requires appropriate thermal management. Presently, conventional thermal fluids have found limited application owing to low thermal conductivity (TC). The need for more efficient fluids has become apparent leading to the development of nanofluids as advanced thermal fluids. Nanofluid synthesis by suspending nano-size materials into conventional thermal fluids to improve thermal properties has been extensively studied. TC is a pivotal property to the utilization of nanofluids in various applications as it is strongly related to improved efficiency and thermal performance. Numerous studies have been conducted on the TC of nanofluids using diverse nanoparticles and base fluids. Different values of TC enhancement have been recorded which depend on various factors, such as nanoparticles size, shape and type, base fluid and surfactant type, temperature, etc. This paper attempts to conduct a state-of-the-art review of the TC enhancement of metal oxide nanofluids owing to the wide attention, chemical stability, low density, and oxidation resistance associated with this type of nanofluid. TC and TC enhancements of metal oxide nanofluids are presented and discussed herein. The influence of several parameters (temperature, volume/weight concentration, nano-size, sonication, shape, surfactants, base fluids, alignment, TC measurement techniques, and mixing ratio (for hybrid nanofluid)) on the TC of metal oil nanofluids have been reviewed. This paper serves as a frontier in the review of the effect of alignment, electric field, and green nanofluid on TC. In addition, the mechanisms/physics behind TC enhancement and techniques for TC measurement have been discussed. Results show that the TC enhancement of metal oxide nanofluids is affected by the aforementioned parameters with temperature and nanoparticle concentration contributing the most. TC of these nanofluids is observed to be actively enhanced using electric and magnetic fields with the former requiring more intense studies. The formulation of green nanofluids and base fluids as sustainable and future thermal fluids is recommended.

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Section: Tc Enhancement Contributing Factorsmentioning

confidence: 99%

Section: Tc Enhancement Contributing Factorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

et al. 2023

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“…The effect of irradiance time on the PEC efficiency of MWCNT-Fe 3 O 4 NFs is shown in Figure 8 . The addition of different kinds of HNPs at various mixing ratios into diverse base fluids is known to produce different HNFs with varying thermal and optical properties [ 55 , 56 , 57 , 58 ]. This is because the individual base fluid and NPs have different absorption capacities (at different wavelengths) and thermal properties lending to synergetic effects on these properties.…”

Section: Photothermal Performance Of Hybrid Nanofluidsmentioning

confidence: 99%

Experimental Exploration of Hybrid Nanofluids as Energy-Efficient Fluids in Solar and Thermal Energy Storage Applications

et al. 2023

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In response to the issues of environment, climate, and human health coupled with the growing demand for energy due to increasing population and technological advancement, the concept of sustainable and renewable energy is presently receiving unprecedented attention. To achieve these feats, energy savings and efficiency are crucial in terms of the development of energy-efficient devices and thermal fluids. Limitations associated with the use of conventional thermal fluids led to the discovery of energy-efficient fluids called “nanofluids, which are established to be better than conventional thermal fluids. The current research progress on nanofluids has led to the development of the advanced nanofluids coined “hybrid nanofluids” (HNFs) found to possess superior thermal-optical properties than conventional thermal fluids and nanofluids. This paper experimentally explored the published works on the application of HNFs as thermal transport media in solar energy collectors and thermal energy storage. The performance of hybrid nano-coolants and nano-thermal energy storage materials has been critically reviewed based on the stability, types of hybrid nanoparticles (HNPs) and mixing ratios, types of base fluids, nano-size of HNPs, thermal and optical properties, flow, photothermal property, functionalization of HNPs, magnetic field intensity, and orientation, and φ, subject to solar and thermal energy storage applications. Various HNFs engaged in different applications were observed to save energy and increase efficiency. The HNF-based media performed better than the mono nanofluid counterparts with complementary performance when the mixing ratios were optimized. In line with these applications, further experimental studies coupled with the influence of magnetic and electric fields on their performances were research gaps to be filled in the future. Green HNPs and base fluids are future biomaterials for HNF formulation to provide sustainable, low-cost, and efficient thermal transport and energy storage media.

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“…The choice of surfactants depends on the base fluid and NP types engaged in the formulation of NF [ 16 , 31 , 35 , 36 ]. It is worth stressing that the use of surfactants to improve the stability of NF and HNF is achievable at an optimum weight fraction above and below which instability is experienced [ 37 , 38 , 39 ]. The optimal weight fraction equivalent to the critical micelle concentration is very important to NF and HNF stability.…”

Section: Formulation and Stability Of Mono-particle And Hybrid Nanmentioning

confidence: 99%

Experimental Research and Development on the Natural Convection of Suspensions of Nanoparticles—A Comprehensive Review

et al. 2020

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Suspensions of nanoparticles, widely known as nanofluids, are considered as advanced heat transfer media for thermal management and conversion systems. Research on their convective thermal transport is of paramount importance for their applications in such systems such as heat exchangers and solar collectors. This paper presents experimental research on the natural convection heat transfer performances of nanofluids in different geometries from thermal management and conversion perspectives. Experimental results and available experiment-derived correlations for the natural thermal convection of nanofluids are critically analyzed. Other features such as nanofluid preparation, stability evaluation and thermophysical properties of nanofluids that are important for this thermal transfer feature are also briefly reviewed and discussed. Additionally, techniques (active and passive) employed for enhancing the thermo-convection of nanofluids in different geometries are highlighted and discussed. Hybrid nanofluids are featured in this work as the newest class of nanofluids, with particular focuses on the thermophysical properties and natural convection heat transfer performance in enclosures. It is demonstrated that there has been a lack of accurate stability evaluation given the inconsistencies of available results on these properties and features of nanofluids. Although nanofluids exhibit enhanced thermophysical properties such as viscosity and thermal conductivity, convective heat transfer coefficients were observed to deteriorate in some cases when nanofluids were used, especially for nanoparticle concentrations of more than 0.1 vol.%. However, there are inconsistencies in the literature results, and the underlying mechanisms are also not yet well-understood despite their great importance for practical applications.

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Influence of nanoparticles size, per cent mass ratio, and temperature on the thermal properties of water-based MgO–ZnO nanofluid: an experimental approach

Cited by 30 publications

References 73 publications

Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

Thermal Conductivity Enhancement of Metal Oxide Nanofluids: A Critical Review

Experimental Exploration of Hybrid Nanofluids as Energy-Efficient Fluids in Solar and Thermal Energy Storage Applications

Experimental Research and Development on the Natural Convection of Suspensions of Nanoparticles—A Comprehensive Review

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