Assessment of the thermal performance of a thermosyphon heat pipe using zirconia-acetone nanofluids

Sarafraz, M.M.; Pourmehran, O.; Yang, Bo; Arjomandi, Maziar

doi:10.1016/j.renene.2019.01.035

Cited by 121 publications

(51 citation statements)

References 58 publications

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“…This maximum value of thermal resistance occurs at 15 • because the actual heating area of the thermosyphon's evaporation section of the thermosyphon is the smallest at this angle, and the gravitational component driving the refrigerant reflux is the smallest when the inclination angle is small. This result is in accordance with the results already published in the literature [17,23].…”

Section: Variations In the Total Thermal Resistance And Areal Thermalsupporting

confidence: 94%

Effect of the Inclination Angle on the Steady-State Heat Transfer Performance of a Thermosyphon

Zhang

et al. 2019

Applied Sciences

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A two-phase closed thermosyphon is an efficient heat transfer element. The heat transfer process of this type of thermosyphon includes conduction and convective heat transfer accompanied by phase changes. Variations in the inclination angle of a thermosyphon affect the steady-state heat transfer performance of the device. Therefore, the inclination angle is an important factor affecting the performance of a thermosyphon. In this paper, an equation for the actual heating area variations with respect to the inclination angle is deduced, and a model for the areal thermal resistance of a thermosyphon is proposed by analyzing the main influence mechanisms of the inclination angle on the heat transfer process. The experimental results show that the areal thermal resistance, which accounts for the effect of the actual heating area, does not change with respect to the inclination angle and exhibits a linear relationship with the heat transfer rate. The thermal resistance equation is fit according to the experimental data when the inclination angle of the thermosyphon is vertically oriented (90 • ), and the predicted values of the thermosyphon's thermal resistance are obtained when the thermosyphon is inclined. The deviations between the experimental data and predicted values are less than ±0.05. Therefore, the theoretical equation can accurately predict the thermosyphon's thermal resistance at different inclination angles.

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Section: Variations In the Total Thermal Resistance And Areal Thermalsupporting

confidence: 94%

Effect of the Inclination Angle on the Steady-State Heat Transfer Performance of a Thermosyphon

Zhang

et al. 2019

Applied Sciences

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“…In [35], Sheikholeslami and Bhatti have studied applied electric field on the nanofluid by means of electro-hydrodynamics (EHD) which augment the rate of heat. Similarly, some notable researches have been reported in [36][37][38][39] which involve the application of electroosmosis and different kinds of nanofluid flows.…”

Section: Introductionmentioning

confidence: 99%

Study of Two-Phase Newtonian Nanofluid Flow Hybrid with Hafnium Particles under the Effects of Slip

et al. 2020

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This paper investigates the role of slip in a two-phase flow of Newtonian fluid. The nano-size Hafnium particles are used in the base fluid. The fluid under consideration is studied for two cases namely (i) fluid phase (ii) phase of particles. Both cases are examined for three types of geometries. The governing equations are simplified in nondimensional form for each phase along with boundary conditions. The resulting equations have been analytically solved to get exact solutions for both fluid and particle phases. Different features of significant physical factors are discussed graphically. The flow patterns have been examined through streamlines.

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“…Das [30] investigated, through an imperative mathematical analysis on the convective heat transference narration of nanofluids through an infiltrate-able stretching sheet, the existence of partially slip, thermal buoyancy, and internal heat development/captivation. Sarafraz et al [31] conducted an experimental study to quantify the heat transfer coefficient, thermal resistance and the thermal performance of a thermosyphon heat pipe charged with zirconia-acetone nanofluid. Sohaib et al [32] investigated the multislip impacts of a magneto-hydrodynamic mixed convection unsteady flow of micropolar nanofluid through a stretching sheet on radiation and the heat source.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Variable Viscosity Impact on MHD Flow and Heat Transfer of Nanofluid Using the Cattaneo–Christov Model

2020

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In this mathematical study, magnetohydrodynamic, time-independent nanofluid flow over a stretching sheet by using the Cattaneo-Christov heat flux model is inspected. The impact of the thermal, solutal boundary and gravitational body forces with the effect of double stratification on the mass flow and heat transfer phenomena is also observed. The temperature-dependent viscosity impact on heat transfer through a moving sheet with capricious heat generation in nanofluids have studied, and the viscosity of the fluid is presumed to deviate as the inverse function of temperature. With the appropriate transformations, the system of partial differential equations is transformed into a system of nonlinear ordinary differential equations. By applying the variational finite element method, the transformed system of equations is solved. The properties of the several parameters for buoyancy, velocity, temperature, stratification, and Brownian motion parameters have examined. The enhancement in the concentration and thermal boundary layer thickness of the nanofluid sheet due to the increment in the viscosity parameter, also increased the temperature and concentration of nanoparticles. Moreover, the fluid temperature declined with the increasing values of thermal relaxation parameter. This displays that the Cattaneo-Christov heat flux model provides a better assessment of temperature distribution. Moreover, confirmation of the code and precision of the numerical method has inveterate with the valuation of the presented results with previous studies.

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Assessment of the thermal performance of a thermosyphon heat pipe using zirconia-acetone nanofluids

Cited by 121 publications

References 58 publications

Effect of the Inclination Angle on the Steady-State Heat Transfer Performance of a Thermosyphon

Effect of the Inclination Angle on the Steady-State Heat Transfer Performance of a Thermosyphon

Study of Two-Phase Newtonian Nanofluid Flow Hybrid with Hafnium Particles under the Effects of Slip

Finite Element Analysis of Variable Viscosity Impact on MHD Flow and Heat Transfer of Nanofluid Using the Cattaneo–Christov Model

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