Review on aqueous graphene nanoplatelet Nanofluids: Preparation, Stability, thermophysical Properties, and applications in heat exchangers and solar thermal collectors

Huq, Tahsinul; Ong, Hwai Chyuan; Chew, Bee Teng; Leong, Kin Yuen; Newaz, Kazi Salim

doi:10.1016/j.applthermaleng.2022.118342

Cited by 41 publications

(13 citation statements)

References 103 publications

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“…Over the years, the stability of nanoparticles has posed a significant challenge to scientists, which has been improved in several ways, most notably the use of surfactants, chemical modification, pH adjustment and ultrahigh sonication [6]. Many other factors have also attracted researchers' attention, such as studying the effect of nanoparticle mass loading, temperature, and sonication time on the amount of increase in viscosity and the k enhancement [7,8]. In the last decade, research in this field have intensified to study the effect of two types of additives on physical and thermal characteristics of the base fluids (i.e., hybrid nanofluids) [9].…”

Section: Introductionmentioning

confidence: 99%

XPS and material properties of raw and oxidized carbide-derived carbon and their application in antifreeze thermal fluids/nanofluids

Almanassra

Zakaria

Кочкодан

et al. 2022

J Therm Anal Calorim

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In this study, the stability, thermal conductivity and viscosity of carbide-derived carbon antifreeze thermal fluids were explored. The study also compares the results between antifreeze suspensions prepared using oxidized CDC and emulsified CDC using gum arabic. At first, the raw CDC was oxidized with oxygen by acid treatment and the Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results revealed an increase in the oxygen content and oxygen functional groups in oxidized CDC. The two-step method was utilized for CDC thermal fluids preparation. Sedimentation visualization and zeta potential testing were employed to investigate stability of nanofluids with time. The stability results revealed that the oxidized CDC has better stability and higher zeta potential values than the emulsified CDCs; however, both mixtures demonstrated stable suspensions for three months. Viscosity measurements showed that the gum arabic CDC suspensions have a higher viscosity than the oxidized CDC; the viscosity was growing with CDC and gum arabic loadings and decreased with temperature. The thermal conductivity analysis was carried out using a lambda analyzer in a temperature range of 288–338 K with a CDC mass loading range of 0.05–0.3 mass%. The experimental outcomes demonstrated that oxidized CDC suspension has better thermal conductivity than gum arabic emulsified CDC. The highest improvement in thermal conductivity was 25.6% using 0.3 mass% of oxidized CDC at 338 K. Moreover, raising the gum arabic mass loading was found to reduce the thermal conductivity enhancement. Therefore, according to the results, the oxidized CDC antifreeze suspensions can perform better than the emulsified CDC. Graphical abstract

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Section: Introductionmentioning

confidence: 99%

XPS and material properties of raw and oxidized carbide-derived carbon and their application in antifreeze thermal fluids/nanofluids

Almanassra

Zakaria

Кочкодан

et al. 2022

J Therm Anal Calorim

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“…Nowadays, in several scientific fields, nanoparticles with nanosized particles smaller than 100 nm have been extensively examined [6]. Also, metal nanoparticles such as Ag [7], Cu [8], and Al [9], metal oxide such as Fe 3 O 4 [10,11], Al 2 O 3 [12], and TiO 2 [13], carbon-based nanoparticles such as graphene [14], and multiwalled carbon nanotubes (MWCNTs) [15] are among the most common nanoparticles. For enhancing heat transfer, graphene and carbon nanotubes have greater thermophysical characteristics than other nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Effect of Graphene/Water Nanofluid on the Heat Transfer of a Shell-and-Tube Heat Exchanger

Zolfalizadeh

Heris

Pourpasha

et al. 2023

International Journal of Energy Research

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The most common type of heat exchanger used in a variety of industrial applications is the shell-and-tube heat exchanger (STHE). In this work, the impact of graphene nanoplate (GNP)/water nanofluids at 0.01 wt.%, 0.03 wt.%, and 0.06 wt.% on the thermal efficiency, thermal performance factor, pressure drop, overall heat transfer, convective heat transfer coefficient (CVHTC), and heat transfer characteristics of a shell-and-tube heat exchanger was examined. For these experiments, a new STHE was designed and built. The novelty of this study is the use of GNPs/water nanofluids in this new STHE for the first time and the fully experimental investigation of the attributes of nanofluids. GNP properties were analysed and confirmed using analyses including XRD and TEM. Zeta potential, DLS, and camera images were used to examine the stability of nanofluids at various periods. The zeta potential of the nanofluids was lower than -27.8 mV, confirming the good stability of GNP/water nanofluids. The results illustrated that the experimental data for distilled water had a reasonably good agreement with Sieder-Tate correlation. The maximum enhancement in the CVHTC of nanofluid with 0.06 wt.% of GNP, was equal to 910 (W/m2K), an increase of 22.47%. Also, the efficiency of the heat exchanger for nanofluid at 0.06 wt.% improved by 8.88% compared with that of the base fluid. The heat transfer rate of the nanofluid at maximum concentration and volume flow rate was 3915 (J/kg.K), an improvement of 15.65% over the base fluid. The pressure drops increased as the flow rate and concentration of the nanofluid increased. Although increasing the pressure drop in tubes would increase the CVHTC, it would also increase the power consumption of the pump. In conclusion, nanofluid at 0.06 wt.% had good performance.

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“…They found that the novel cooling working liquids prepared by adding nanoparticles to base fluids can enhance convective heat transfer. In the following three decades, achievements of nanofluid research show that compared with traditional cooling working liquids, nanofluids have promising applications in fields such as electronic devices, high-voltage transmission, thermonuclear power generation, and the thermotube and aerospace industry [2][3][4][5]. Existing research indicates that nanofluids with high concentrations can fully play the effect of enhanced heat transfer [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The effect of the degree of sulphenylation on the stability of reduced graphene oxide nanofluids

Wang

2023

J. Phys.: Conf. Ser.

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Dispersion stability of nanoparticles in nanofluids is a prerequisite for allowing the nanofluids to act as convection heat transfer working fluids. This research prepared multiple types of sulfophenylated graphene (PSG) nanoparticles. Two samples subjected to different degrees of sulfophenylation were chosen to formulate different nanofluids with varying sulfophenylated particle concentrations. The nanofluids’ measured Zeta potential, electric conductivity, and thermal conductivity coefficients were used to investigate the stability. The research indicates the increase in the degree of sulfophenylation can improve the stability of nanofluids while exerting little influence on thermal conductivity; on the premise of ensuring stability, the number of nanoparticles added in base fluids can increase thermal conductivity. After that, high-sulfophenylated particle concentration nanofluids (2 mg/mL) were formulated using sulfonated-reduced graphene oxide (s-rGO) nanoparticles prepared to demonstrate excellent stability, and their thermal conductivity reached 0.773 W/m. K (55 °C).

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Review on aqueous graphene nanoplatelet Nanofluids: Preparation, Stability, thermophysical Properties, and applications in heat exchangers and solar thermal collectors

Cited by 41 publications

References 103 publications

XPS and material properties of raw and oxidized carbide-derived carbon and their application in antifreeze thermal fluids/nanofluids

XPS and material properties of raw and oxidized carbide-derived carbon and their application in antifreeze thermal fluids/nanofluids

Experimental Investigation of the Effect of Graphene/Water Nanofluid on the Heat Transfer of a Shell-and-Tube Heat Exchanger

The effect of the degree of sulphenylation on the stability of reduced graphene oxide nanofluids

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