Improvement of heat transfer characteristics of cylindrical heat pipe by using SiC nanofluids

Ghanbarpour, Morteza; Nikkam, Nader; Khodabandeh, Rahmatollah; Toprak, Muhammet S.

doi:10.1016/j.applthermaleng.2015.07.004

Cited by 72 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Buongiorno model 13 implies that the Brownian diffusion and thermophoresis are the most prominent parameters the characteristise nanofluid flows. Recently, work on convective boundary layer flow in nanofluids include Ghanbarpour et al, 23 Li et al, 24 Vanaki et al, 25 Zhao et al, 26 Serna,27 Mohyud-Din 28 and others. Ferdows et al 29 investigated radiative magnetohydrodynamic nano-polymer stretching flows.…”

Section: Introductionmentioning

confidence: 99%

Nanofluid slip flow over a stretching cylinder with Schmidt and Péclet number effects

et al. 2016

View full text Add to dashboard Cite

A mathematical model is presented for three-dimensional unsteady boundary layer slip flow of Newtonian nanofluids containing gyrotactic microorganisms over a stretching cylinder. Both hydrodynamic and thermal slips are included. By applying suitable similarity transformations, the governing equations are transformed into a set of nonlinear ordinary differential equations with appropriate boundary conditions. The transformed nonlinear ordinary differential boundary value problem is then solved using the Runge-Kutta-Fehlberg fourth-fifth order numerical method in Maple 18 symbolic software. The effects of the controlling parameters on the dimensionless velocity, temperature, nanoparticle volume fractions and microorganism motile density functions have been illustrated graphically. Comparisons of the present paper with the existing published results indicate good agreement and supports the validity and the accuracy of our numerical computations. Increasing bioconvection Schmidt number is observed to depress motile micro-organism density function. Increasing thermal slip parameter leads to a decrease in temperature. Thermal slip also exerts a strong influence on nano-particle concentration. The flow is accelerated with positive unsteadiness parameter (accelerating cylinder) and temperature and micro-organism density function are also increased. However nano-particle concentration is reduced with positive unsteadiness parameter. Increasing hydrodynamic slip is observed to boost temperatures and micro-organism density whereas it decelerates the flow and reduces nano-particle concentrations. The study is relevant to nano-biopolymer manufacturing processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Nanofluid slip flow over a stretching cylinder with Schmidt and Péclet number effects

et al. 2016

View full text Add to dashboard Cite

show abstract

“…To enhance the precision of the experimental results, the system errors were analyzed and measurement uncertainty evaluated (Ghanbarpour et al, 2015). The uncertainty of the system mainly comes from the uncertainty of machining error, heat flux and thermal resistance.…”

Section: Experiments Methodsmentioning

confidence: 99%

“…Most traditional heat pipes are tube types that rely on the capillary structure of the wick to transport heat against gravity, thereby creating a driving force. The heat is transferred through phase transformation, movement of working medium, and evaporation from the adiabatic section to the condenser (Ghanbarpour et al, 2015). The shape of the flat heat pipe (FPHP) makes it difficult for the FPHP to be in full contact with the heating element because the contact thermal resistance is larger and because the heat pipe bending shape has a significant effect on heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Wick and the Working Medium on the Thermal Resistance of FPHP

et al. 2018

View full text Add to dashboard Cite

This paper introduces a novel micro-deep, triangle-grooved wick, and compares the performance of the flat plate heat pipe (FPHP) with various types of wicks, including foam metal copper wick, sintered copper powder wick, copper mesh wick, micro-deep rectangle-grooved wick, and micro-deep triangle-grooved wick. Test results verified the feasibility of the nanofluids applied to FPHP. Tested working fluids included deionized water, Cu-water nanofluids, carbon-coated copper nanofluids and multi-walled carbon nanotube (MWCNT) nanofluids. These nanofluids were applied on foam metal FPHP and the results were compared. The results indicated that the metal foam wick is better than the other heat pipe wicks, in the contrast experiment, when the heating power is 100 w, the thermal resistance is 0.1238 • C/K. The thermal resistance of micro-deep triangle-grooved wick FPHP is 15% lower than the micro-deep rectangle-grooved wick FPHP; The optimal filled ratio of 40% can make flat heat pipe have good performance; With the increase of mass fraction of nanofluid, the thermal resistance decreased first and then increased, the best mass fraction is 0.5%, the thermal conductivity of carbon-coated copper nanofluids FPHP is optimal, the average thermal resistance is 0.1369 • C/K, and is 17 and 9% lower than the multi-walled carbon nanofluids and copper FPHP, and is 46% lower than the deionized water FPHP; The gravitational stability of the heat pipe is verified by the experiments.

show abstract

“…), a base fluid in which nanoparticles are doped and a surface-active agent (surfactant) to prevent agglomeration of nanoparticles. It was observed in latest studies that nanofluids have been successfully employed as working fluid in various systems (Chen et al 2013, Ghanbarpour et al 2015, Kim and Bang 2015, Sözen et al 2016, Khanlari et al 2019, Baïri and Laraqi 2019, Ozdemir and Ergun 2019, Dagdevir et al 2019, Sözen et al 2019a, Sözen et al 2019b) more in particular in heat pipes (Huminic and Huminic 2013, Venkatachalapathy et al 2015, Tharayil et al 2015, Sözen et al 2018, Gürü et al 2019. To illustrate; Hassan et al (2015) analysed influence of accumulation on the heat pipe wick porosity following the alumina (Al2O3) nano fluid usage as the working medium.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Improvement of the Heat Pipe by Employing Dolomite/Ethylene Glycol Nanofluid

Aydın

Gürü

Sözen

et al. 2020

Int. J. Renew. Energy Dev.

View full text Add to dashboard Cite

In heat transfer applications, heat pipes are widely- preferred because of some characteristics such as low cost, being able to be produced in any size and low maintenance cost make them superior. Moreover, the working fluid to be employed substantially affects the heat transfer characteristics of a heat pipe. In this paper, effects of nanoparticle addition into the ethylene glycol on heat pipe’s thermal performance were analysed experimentally. Every test was done using two variant working fluids, ethylene glycol and dolomite nanoparticles-doped ethylene glycol, respectively. Dolomite nanoparticles (2% by weight) and Sodium Dodecyl Benzene Sulfonate (0.5% by weight) were doped into the ethylene glycol while preparing the dolomite/ethylene glycol nanofluid. After filling in the heat pipe, experiments were realized under changing working conditions. Using experimental data, efficiency and thermal resistance of the heat pipe were examined. Viscosity of the each working fluid was determined. The contact angle –wettability measurements were also performed to specify the effects of surface active agent addition. The obtained findings revealed that nanoparticle inclusion inside the base fluid, i.e. ethylene glycol, improved the thermal performance (efficiency) and decreased the heat pipe’s thermal resistance substantially. ©2020. CBIORE-IJRED. All rights reserved

show abstract

Improvement of heat transfer characteristics of cylindrical heat pipe by using SiC nanofluids

Cited by 72 publications

References 29 publications

Nanofluid slip flow over a stretching cylinder with Schmidt and Péclet number effects

Nanofluid slip flow over a stretching cylinder with Schmidt and Péclet number effects

Effect of the Wick and the Working Medium on the Thermal Resistance of FPHP

Thermal Performance Improvement of the Heat Pipe by Employing Dolomite/Ethylene Glycol Nanofluid

Contact Info

Product

Resources

About