Boiling Heat Transfer of Alumina Nano-Fluids: Role of Nanoparticle Deposition on the Boiling Heat Transfer Coefficient

Salari, E.; Peyghambarzadeh, Mohsen; Sarafraz, M.M.; Hormozi, Faramarz

doi:10.3311/ppch.9324

Cited by 71 publications

(35 citation statements)

References 25 publications

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“…The appreciable increase in R f is too high which indicates that the conjoint effect of nanoparticles and oil deposition is very effective to increase the fouling rate with time. CuO and aluminum oxide nanoparticles have also been reported by Sarafraz et al and Salari et al to increase the fouling resistance on heat exchanger surface. The authors postulated that the increase of fouling resistance due to the nanoparticles accumulation occurs in three stages.…”

Section: Resultsmentioning

confidence: 78%

“…Second and third stages include an increased accumulation of nanoparticle layers on the initial layer which causes a sharp increase in the fouling resistance. In general, the nanoparticle size and the surface roughness influence the possibility of nanoparticle accumulation on the surface . In addition, the presence of oil deposits on the surface plays an important in increasing the sticking of nanoparticle on the surface.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Majdi

Alabdly

Hasan

et al. 2019

Heat Trans. Asian Res.

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Dispersions of oil in water are encountered in a variety of industrial processes leading to a reduction in the performance of the heat exchangers when thermally treating such two phase fluids. This reduction is mainly due to changes in the thermal and hydrodynamical behavior of the two phase fluid. In the present work, an experimental investigation was performed to study the effects of light oil fouling on the heat transfer coefficient in a double-pipe heat exchanger under turbulent flow conditions. The effects of different operating conditions on the fouling rate were investigated including: hot fluid Reynolds number (the dispersion), cold fluid Reynolds number, and time. The oil fouling rate was analyzed by determining the growth of fouling resistance with time and through pressure drop measurements. The influence of copper oxide (CuO) nanofluid on the fouling rate in the dispersion was also determined. It was found that the presence of dispersed oil causes a reduction in heat transfer coefficient by percentages depending on the Reynolds number of both cold and hot fluids and the concentration of oil. In addition, the time history of fouling resistance exhibited different trends with the flow rates of both fluids and its trend was influenced appreciably by the presence of CuO nanofluid. K E Y W O R D S copper oxide, dispersion, double-pipe heat exchanger, fouling, heat transfer, nanofluid, oil Heat Transfer-Asian Res.

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Majdi

Alabdly

Hasan

et al. 2019

Heat Trans. Asian Res.

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“…Salari et al [37] experimentally studied the thermal performance of alumina-water nanofluids during the flow boiling conditions for both convective and nucleate boiling regions. Their work was focused on the nanoparticles Fig.…”

Section: Effect Of Nanofluids On (Htc) and (Chf)mentioning

confidence: 99%

Experimental studies of flow boiling heat transfer by using nanofluids

Kamel

Lezsovits

Hussein

2019

J Therm Anal Calorim

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Flow boiling heat transfer widely utilized in numerous industrial applications such as boiler tubes, evaporators and cooling of reactors in a nuclear power plant. Nanofluids are a new category of thermal fluids, made by dispersing a nanometer solid particle which is usually less than 100 nm into conventional liquids such as water, oil engine and ethylene glycol with the intent to enhance the thermal properties of the base fluids. This work reviews the recent experimental studies focusing on the flow boiling heat transfer using nanofluids. The latest results associated with this subject are presented and outlined to account the influence of several parameters, which are related to operating conditions and nanoparticles morphology on the heat transfer coefficient and the critical heat flux. Besides, the effects of nanoparticles on other related sub-phenomenon of the flow boiling by using nanofluids were discussed. Moreover, the latest review papers of the related topic were presented and briefly discussed. Finally, suggestions for future research activities related to this field were also concisely listed.

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“…Particulate fouling of CuO‐water nanofluid at isothermal diffusive condition inside the conventional heat exchanger‐experimental and modeling was investigated by Nikkhah et al A new correlation based on the experimental data at isothermal/diffusion flow conditions is introduced, which can predict the fouling resistance of CuO/water nanofluids with absolute average deviation less than 30%. An experimental study on boiling heat transfer coefficient of Alumina nanofluids was investigated by Salari et al Their study demonstrates that the reason for deterioration of heat transfer coefficient is referred to the surface roughness, nanoparticle size, static contact angle, and thermal fouling resistance parameters. Nikkhah et al investigated application of spherical copper oxide water nanofluid as a potential coolant in a boiling annular heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of heat transfer and friction factor in a tube with groove and rib on the wall

et al. 2020

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Heat transfer and friction factor in a tube with turbulator internally grooved and rib are studied using numerical simulation. Two different turbulator geometries, including only groove and both groove and rib, on the tube wall are investigated. The study is developed for different parameters of turbulator including pitch ratio (PR), groove and rib height (DR), and Reynolds number in the range of 10 000 to 38 000. The results revealed that the best Nusselt number is achieved for GR turbulator and for the tube wall with PR = 2 and DR = 1. Furthermore, for a specific turbulator parameter, Nusselt number is improved by 46% compared with the experimental result. The results show that the friction factor decreases by increase of both step and height ratios. For example, based on Reynolds number, 21% to 69% reduction in the friction factor was observed for PR = 7 and DR = 3. In addition, the correlations for Nusselt number and friction factor with acceptable deviation are presented for the studied turbulators.Finally, thermal performance enhancement factor is defined to be a good criterion for selection of the optimum turbulator and their parameters.correlation, friction factor, Nusselt number, thermal performance enhancement factor, turbulator

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Boiling Heat Transfer of Alumina Nano-Fluids: Role of Nanoparticle Deposition on the Boiling Heat Transfer Coefficient

Abstract: This paper focuses on the thermal performance of alumina

Cited by 71 publications

References 25 publications

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Oil fouling in double‐pipe heat exchanger under liquid‐liquid dispersion and the influence of copper oxide nanofluid

Experimental studies of flow boiling heat transfer by using nanofluids

Numerical study of heat transfer and friction factor in a tube with groove and rib on the wall

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