An experimental study on heat transfer performance and pressure drop of nanofluids using graphene and multi-walled carbon nanotubes based on diesel oil

Naddaf, Atiyeh; Heris, Saeed Zeinali; Pouladi, Babak

doi:10.1016/j.powtec.2019.04.078

Cited by 71 publications

(14 citation statements)

References 39 publications

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“…Based on the acquired outcomes, the pressure drops in the tube increased with the rising in the Reynolds number or inlet velocity. Recently, researchers have stated the identical trend for other nanofluids[31,92]. The friction factor was raised in all contents of ZnO and MoS 2 NPs with the highest increment of 8.2 % and 8.3% for ZnO and MoS 2 nanofluids happening at 0.7 wt.% with the lowest inlet velocity.…”

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confidence: 67%

Viscosity, tribological and physicochemical features of ZnO and MoS2 diesel oil-based nanofluids: An experimental study

Mousavi

Heris

Estellé

2021

Fuel

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117

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In this research, two different diesel oil-based nanofluids were prepared and the influence of temperature and nanoparticle content were examined on viscosity, tribological, and physicochemical features of diesel oil. The kinematic viscosity of samples was experimentally evaluated based on standard ASTM D445. The greatest viscosity increment was diagnosed at 0.7 wt.% and 100°C for both of the prepared nanofluids. The anti-friction behavior of the nanofluids was studied utilizing a pin-on-disc tribometer. The acquired outcomes revealed that ZnO and MoS 2 nanoparticles (NPs) could promote the tribological characteristics of pure diesel oil. By analyzing the friction coefficient values and line roughness of the wear surface (Ra), an optimal concentration of ZnO and MoS 2 nanoparticles (NPs) were found to be around 0.4 wt.% and 0.7 wt.%, respectively. The friction factor and pumping power were also measured at diverse content of nanoparticles and flow rates showing that the pumping power was enhanced by the incorporation of nanoparticles.

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confidence: 67%

Viscosity, tribological and physicochemical features of ZnO and MoS2 diesel oil-based nanofluids: An experimental study

Mousavi

Heris

Estellé

2021

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117

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“…In this point of view, many research studies have been carried out to find a way to enhance the performance and convective heat transfer coefficient using different nanoparticles with water and ethylene glycol as base fluids at varying concentration and particle size. [27][28][29][30][31][32][33] Naddaf et al 34 synthesized and investigated the density and viscosity of multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) with surfactant oleic acid (OA) and covalent with hexylamine (HA)-based diesel oil. Naddaf and Heris 35 noted that the viscosity of OA-MWCNT/DO is 2.1% higher than that of OA-GNP/DO while the density of OA-GNP/DO is 0.34% higher than that of OA-MWCNT/ DO.…”

Section: Introductionmentioning

confidence: 99%

A study on utilization of ground source energy for space heating using a nanofluid as a heat carrier

Tarodiya

Verma

Thangavel³

2021

Heat Trans

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Ground source heat pump (GSHP) systems are well established as an energy‐efficient space conditioning device. However, for better utilization of the ground source, improvement in GSHP performance is desirable, which limits the small temperature difference between the ground and the circulating fluid. In this study, efforts have been made to investigate the performance of a ground heat exchanger (GHX) with a nanofluid as a heat carrier. Mathematical modeling is performed for the closed‐loop vertical U‐tube GHX with six different (Al2O3, CuO, graphite, multiwalled carbon nanotube, graphene, and Cu) water‐based nanofluids. The effect of different operating parameters on GHX length, fluid temperature, and pressure drop with nanofluids is determined. On the basis of the analytical results, it is found that the graphite particle‐based nanofluid plays a prominent role to enhance the performance of the GHX as compared with other nanoparticles. The maximum enhancement in the increase in outlet fluid temperature and reduction in pipe length with graphite particle‐based nanofluid are 68.3% and 63.3%, respectively, for an increase in temperature difference from 7°C to 15°C between the atmosphere and the ground. Also, with the graphite particle‐based nanofluid and the increase in pipe diameter from 20 to 50 mm, the fluid outlet temperature increases up to 11.2%, and the requirement in GHX length reduces up to 55%.

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“…While the negative effect of CNT on the friction coefficient, an increase from 0.21 to 0.32 was observed. Naddaf et al 39 studied the tribological performance of diesel oil containing graphene and MWCNT as lubricating additives. Their results indicated that the heat transfer properties of nanofluids improved compared to the base oil.…”

Section: Introductionmentioning

confidence: 99%

Comparison between multi-walled carbon nanotubes and titanium dioxide nanoparticles as additives on performance of turbine meter oil nano lubricant

Pourpasha

Heris

Mohammadfam

2021

Sci Rep

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This research aims of compare the impact of the mass fraction of multi-walled carbon nanotubes (MWCNTs) and titanium dioxide (TiO2) nano additive on the tribological and thermophysical attributes of turbine meter oil. These attributes include the average friction coefficient, pressure drop, wear, flash point, pour point, relative viscosity, kinematics viscosity, and viscosity index. The pressure drops and the average friction coefficient inside the copper tube were simulated and compared with experimental results. In this study, for the synthesis of nano lubricants from turbine meter oil as a pure fluid and from MWCNTs and TiO2 as nano additives in the mass fraction of 0.05, 0.1, 0.2, 0.3, and 0.4 wt.% and from oleic acid and Triton x100 as surfactants were utilized. The results illustrated that the wear depth of copper pins in the presence of nano lubricant with 0.4 wt.% of MWCNTs and 0.1 wt.% TiO2 was improved by 88.26% and 71.43%, respectively. Increasing 0.3 wt.% of TiO2 and MWCNTs into the oil caused to improvement in viscosity index. The simulation data and experimental data for the pressure drop were closer together and indicated a minor error that the maximum error is less than 10%.

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An experimental study on heat transfer performance and pressure drop of nanofluids using graphene and multi-walled carbon nanotubes based on diesel oil

Cited by 71 publications

References 39 publications

Viscosity, tribological and physicochemical features of ZnO and MoS2 diesel oil-based nanofluids: An experimental study

Viscosity, tribological and physicochemical features of ZnO and MoS2 diesel oil-based nanofluids: An experimental study

A study on utilization of ground source energy for space heating using a nanofluid as a heat carrier

Comparison between multi-walled carbon nanotubes and titanium dioxide nanoparticles as additives on performance of turbine meter oil nano lubricant

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