A comparative heat transfer study between monotype and hybrid nanofluid in a duct with various shapes of ribs

Ekiciler, Recep; Çetinkaya, Muhammet Samet Ali

doi:10.1016/j.tsep.2021.100913

Cited by 33 publications

(3 citation statements)

References 51 publications

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“…Hybrid nanofluid consists of two or more different nanoparticles. In the literature, it has been seen that hybrid nano-fluids are more effective in improving heat transfer than monotype nanofluids [38]. There are several studies about hybrid nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Augmentation of thermohydraulic performance in a dimpled tube using ternary hybrid nanofluid

KEKLİKCİOĞLU

2024

European Mechanical Science

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This computational study explores the thermal and hydraulic efficiency of heat exchanger tube configurations utilizing hybrid nanofluids and circular dimples. Seven distinct configurations incorporating different volumetric concentrations of three nanoparticles (GnP, MWCNT, and Fe3O4) and two circular dimple pitch ratios are examined. The investigation concentrates on crucial parameters, including Nusselt number, friction factor, and thermohydraulic performance. The numerical analysis specifically addresses single-phase flow within the Reynolds number range of 5000-30000, maintaining a constant surface heat flux during simulations. Notably, Nusselt number consistently rises with Reynolds number across all configurations. Friction factor analysis indicates minimal sensitivity to hybrid nanofluid ratios but an increase with circular dimples. Despite the elevated pressure drop, the thermohydraulic coefficient consistently surpasses 1, signifying a net energy gain from enhanced heat transfer. Optimal performance is observed in the S5-P/Dt=1 configuration, exhibiting the highest thermohydraulic coefficient at 1.35, while the P/Dt =2 variation within the same fluid model presents a slightly lower value of 1.32.

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Section: Introductionmentioning

confidence: 99%

Augmentation of thermohydraulic performance in a dimpled tube using ternary hybrid nanofluid

KEKLİKCİOĞLU

2024

European Mechanical Science

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“…It was also noted that an increase in the nanofluid concentration led to a higher Nu, while an increase in the electric voltage led to a higher coefficient of heat transfer. Ekiciler Samet Ali Çetinkaya (2021) studied the effect of different configurations of ribs (triangular, ellipse, and square) in the duct, with different types of nanofluids, on the heat transfer enhancement and fluid flow behavior. The results revealed that the average Nu can be improved by 18.0% using the water–Al 2 O 3 nanofluid with triangular ribs, and by 32.0% using a hybrid nanofluid (Al 2 O 3 /Cu–water).…”

Section: Introductionmentioning

confidence: 99%

Thermal and flow performance analysis of a concentrated linear Fresnel solar collector with transverse ribs

Hasan

Sherza²,

Abed³

et al. 2023

Front. Chem.

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This article deals with the impact of including transverse ribs within the absorber tube of the concentrated linear Fresnel collector (CLFRC) system with a secondary compound parabolic collector (CPC) on thermal and flow performance coefficients. The enhancement rates of heat transfer due to varying governing parameters were compared and analyzed parametrically at Reynolds numbers in the range 5,000–13,000, employing water as the heat transfer fluid. Simulations were performed to solve the governing equations using the finite volume method (FVM) under various boundary conditions. For all Reynolds numbers, the average Nusselt number in the circular tube in the CLFRC system with ribs was found to be larger than that of the plain absorber tube. Also, the inclusion of transverse ribs inside the absorber tube increases the average Nusselt number by approximately 115% at Re = 5,000 and 175% at Re = 13,000. For all Reynolds numbers, the skin friction coefficient of the circular tube with ribs in the CLFRC system is larger than that of the plain absorber tube. The coefficient of surface friction reduces as the Reynolds number increases. The performance assessment criterion was found to vary between 1.8 and 1.9 as the Reynolds number increases.

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“…Raei et al [28] conducted a number of experiments on nanofluids and concluded that the thermal conductivity, as well as the heat transfer coefficient of the base fluid, can be enhanced by using porous metal. Ekiciler and Çetinkaya [29] analyzed the turbulent flow of water-based monotype nanofluid and hybrid nanofluid having a constant 1.0% nanoparticle volume fraction in a duct with rib. Heat transfer, pressure drop, temperature contour, and turbulence intensity were among the parameters studied and evaluated; they discovered that, while the increase in Nusselt number with monotype nanofluid is approximately 18.0%, the increase in Nusselt number with hybrid nanofluid is about 32.0%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dimpled Rib with Arc Pattern on Hydrothermal Characteristics of Al2O3-H2O Nanofluid Flow in a Square Duct

et al. 2022

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The present work is concerned with the experimental analysis of the thermal and hydraulic performance of Al2O3 − H2O nanofluid flow in dimpled rib with arc pattern in a square duct. The Alumina nanofluid consists of nanoparticles having a size of 30 nm. Reynolds number (Renum) studied in the square duct range from 5000 to 26,000. The nanoparticle volume fraction (ϕnp) ranges from 1.5% to 4.5%, the ratio of dimpled-arc-rib-height to print-diameter (HAD/Pd) ranges from 0.533 to 1.133, the ratio of the dimpled-rib-pitch to rib height (PAD/HAD) range from 3.71 to 6.71 and dimpled arc angle (αAD) range from 35° to 65°. The Al2O3 − H2O-based nanofluid flow values of Nusselt number (Nurs) and friction factor (frs) are higher in comparison to pure water. The dimpled ribs in the arc pattern significantly improved the thermal-hydraulic performance of the investigated test section. The nanoparticle concentration of 4.5%, the ratio of dimpled arc rib height to print diameter of 0.933, the relative dimpled arc rib height of 4.64 and the dimpled arc angle of 55° deliver the maximum magnitude of the heat transfer rate. The maximum value of the thermal-hydraulic performance parameters was found to be 1.23 for Al2O3 − H2O-based nanofluid flow in a dimpled rib with arc pattern square duct for the range of parameters investigated. Correlations of Nurs,frs and ηrs have been developed for the selected range of operating and geometric parameters.

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A comparative heat transfer study between monotype and hybrid nanofluid in a duct with various shapes of ribs

Cited by 33 publications

References 51 publications

Augmentation of thermohydraulic performance in a dimpled tube using ternary hybrid nanofluid

Augmentation of thermohydraulic performance in a dimpled tube using ternary hybrid nanofluid

Thermal and flow performance analysis of a concentrated linear Fresnel solar collector with transverse ribs

Effect of Dimpled Rib with Arc Pattern on Hydrothermal Characteristics of Al2O3-H2O Nanofluid Flow in a Square Duct

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