Thermo-physical properties of diamond nanofluids: A review

Mashali, Farzin; Languri, Ethan; Davidson, J.L.; Kerns, D.V.; Johnson, Wayne; Nawaz, Kashif; Cunningham, Glenn

doi:10.1016/j.ijheatmasstransfer.2018.10.033

Cited by 79 publications

(35 citation statements)

References 95 publications

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“…The method used in the preparation of nanofluids is important in the study of the stability and thermophysical behaviour of nanofluids [57]. The preparation steps are also vital in estimating the degree to which the nanofluids are employed in heat transfer systems [58], [59].…”

Section: Preparation Of Nanofluidsmentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

254

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The field of nanofluids has received interesting attention since the concept of dispersing nanoscaled particles into a fluid was first introduced in the later part of the twentieth century. This is evident from the increased number of studies related to nanofluids published annually. The increasing attention on nanofluids is primarily due to their enhanced thermophysical properties and their ability to be incorporated into a wide range of thermal applications ranging from enhancing the effectiveness of heat exchangers used in industries to solar energy harvesting for renewable energy production. Owing to the increasing number of studies relating to nanofluids, there is a need for a holistic review of the progress and steps taken in 2019 concerning their application in heat transfer devices. This review takes a retrospective look at the year 2019 by reviewing the progress made in the area of nanofluids preparation and the applications of nanofluids in various heat transfer devices such as solar collectors, heat exchangers, refrigeration systems, radiators, thermal storage systems and electronic cooling. This review aims to update readers on recent progress while also highlighting the challenges and future of nanofluids as the next-generation heat transfer fluids. Finally, a conclusion on the merits and demerits of nanofluids is presented along with recommendations for future studies that would mobilise the rapid commercialisation of nanofluids.

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Section: Preparation Of Nanofluidsmentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

254

View full text Add to dashboard Cite

show abstract

“…Recently, carbon-based nanoparticles and two-dimensional nanostructures have captivated ample attention due to their comparatively higher thermal conductivity, greater specific surface area, better compatibility with base fluid, better lubricating property, and ample availability when compared with other nanoparticles [ 25 , 26 ]. A broad number of studies were performed with graphite [ 27 ], carbon nanotubes(CNTs) [ 28 , 29 ], graphene [ 30 ], graphene oxide (GO) [ 31 ], nano diamond [ 32 ], and graphite flake [ 33 ] nanoparticles so far. Yu et al [ 34 ] experimentally measured the thermal conductivity of EG based nanofluid with GO nanosheets where thermal conductivity was noticeably higher by 61% compared to pure EG, while the nanosheet concentration was 5 vol %.…”

Section: Introductionmentioning

confidence: 99%

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

et al. 2020

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In recent years, solar energy technologies have developed an emerging edge. The incessant research to develop a power source alternative to fossil fuel because of its scarcity and detrimental effects on the environment is the main driving force. In addition, nanofluids have gained immense interest as superior heat transfer fluid in solar technologies for the last decades. In this research, a binary solution of ionic liquid (IL) + water based ionanofluids is formulated successfully with two dimensional MXene (Ti3C2) nano additives at three distinct concentrations of 0.05, 0.10, and 0.20 wt % and the optimum concentration is used to check the performance of a hybrid solar PV/T system. The layered structure of MXene and high absorbance of prepared nanofluids have been perceived by SEM and UV–vis respectively. Rheometer and DSC are used to assess the viscosity and heat capacity respectively while transient hot wire technique is engaged for thermal conductivity measurement. A maximum improvement of 47% in thermal conductivity is observed for 0.20 wt % loading of MXene. Furthermore, the viscosity is found to rise insignificantly with addition of Ti3C2 by different concentrations. Conversely, viscosity decreases substantially as the temperature increases from 20 °C to 60 °C. However, based on their thermophysical properties, 0.20 wt % is found to be the optimum concentration. A comparative analysis in terms of heat transfer performance with three different nanofluids in PV/T system shows that, IL+ water/MXene ionanofluid exhibits highest thermal, electrical, and overall heat transfer efficiency compared to water/alumina, palm oil/MXene, and water alone. Maximum electrical efficiency and thermal efficiency are recorded as 13.95% and 81.15% respectively using IL + water/MXene, besides that, heat transfer coefficients are also noticed to increase by 12.6% and 2% when compared to water/alumina and palm oil/MXene respectively. In conclusion, it can be demonstrated that MXene dispersed ionanofluid might be great a prospect in the field of heat transfer applications since they can augment the heat transfer rate considerably which improves system efficiency.

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“…Nanodiamonds have a high specific surface area, tunable surface structure, and exceptional optical and mechanical properties. Due to low phonon scattering and sp 3 hybridized carbon with short bond length, diamond has a high thermal conductivity—about 2200 Wm −1 K −1 and as high as 3320 Wm −1 K −1 in isotropically pure monocrystalline synthetic diamond [ 64 , 66 ]. Carbon nanohorns (CNHs) are closed cages of sp 2 -bonded carbon atoms—they have nanocones, their diameter is typically 2–5 nm, and their length is about 40–50 nm.…”

Section: Carbon-based Nanofluids: Preparation and Stabilitymentioning

confidence: 99%

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

et al. 2020

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Recently, many scientists have been making remarkable efforts to enhance the efficiency of direct solar thermal absorption collectors that depends on working fluids. There are a number of heat transfer fluids being investigated and developed. Among these fluids, carbon nanomaterial-based nanofluids have become the candidates with the most potential by the heat absorbing and transfer properties of the carbon nanomaterials. This paper provides an overview of the current achievements in preparing and exploiting carbon nanomaterial-based nanofluids to direct thermal solar absorption. In addition, a brief discussion of challenges and recommendations for future work is presented.

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Thermo-physical properties of diamond nanofluids: A review

Cited by 79 publications

References 95 publications

An updated review of nanofluids in various heat transfer devices

An updated review of nanofluids in various heat transfer devices

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

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