Experimental investigation and comparison of subcooled flow boiling of TiO<sub>2</sub> nanofluid in a vertical and horizontal tube

Abedini, Ehsan; Behzadmehr, A.; Rajabnia, H.; Sarvari, S. M. Hosseini; Mansouri, S. H.

doi:10.1177/0954406212466765

Cited by 30 publications

(7 citation statements)

References 30 publications

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“…Abedini et al [40] experimentally investigated the subcooled flow boiling of TiO 2 -water. Their results showed that the increase of heating surface wettability due to TiO 2 nanoparticles deposition on the surface increased the departure size of bubbles and decreased their frequency.…”

Section: Recent Studies In Other Parameter Effectmentioning

confidence: 99%

Boiling heat transfer of nanofluids: A review of recent studies

Kamel

Lezsovits

2019

Therm sci

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Adding solid particles of nanometer scale to fluids is one of the most important passive methods of enhancing heat transfer performance. However, this gives numerous chances to investigate new frontiers, but also raises remarkable difficulties. Nanofluids act as suspension that can be obtained by dispersing nanometer-sized nanoparticles (1-100nm) in host fluids with the aim of enhancing thermal properties. This paper is a review of recent studies on boiling heat transfer of nanofluids for pool and convective flow boiling of nanofluids. The research results, collected since 2012 to present of the recent survey are reviewed and briefly outlined. An emphasis is put on the enhancement and the deterioration of the boiling heat transfer coefficient and critical heat flux of pool and convective flow boiling of nanofluids. Other important parameters affecting the boiling of nanofluids are identified and discussed in this review. While preparing future studies is greatly encouraged in order make this phenomenon well understood.

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Section: Recent Studies In Other Parameter Effectmentioning

confidence: 99%

Boiling heat transfer of nanofluids: A review of recent studies

Kamel

Lezsovits

2019

Therm sci

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“…In 21% of these investigations increase, decrease, or non-noticeable effects on the HTC were noticed, depending on experimental conditions [176,184,189,193,198,199]. Some authors observed only reductions in the HTC with the addition of nanoparticles, corresponding to 14% of the listed works [178,188,191,194], while others (7%) did not observe significant HTC variations [28,32]. Yang and Liu [180] and Dursma et al [190] recommended 0.003 and 0.05%, respectively, as optimal volumetric concentrations of nanoparticles, to obtain a maximum flow boiling HTC.…”

Section: Flow Boiling Of Nanofluidsmentioning

confidence: 99%

Nanofluids for heat transfer applications: a review

Moreira

Ribatski

2018

J Braz. Soc. Mech. Sci. Eng.

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Since diluted suspensions of nanoparticles were first called nanofluids and presented as viable solutions for heat transfer applications, this subject has received much attention and related investigations have expanded to many paths. In order to comprehend how nanoscale-related effects could influence the macroscopic transport behavior of nanofluids under single or phase-change conditions, researchers have studied, for example, the stability of these solutions, variation of thermal and rheological properties, and the convective heat transfer behavior of a great variety of nanofillers in common fluids, mainly water. The deposition of nanofillers over heated surfaces has also been investigated due to the role of surface nanostructuring in modifying wettability, thermal resistance, and delaying the occurrence of critical heat flux. Despite the considerable number of publications regarding nanofluids, scattered results for transport properties or convective behavior of nanofluids under similar experimental conditions are often found, which hinders their applications due to a lack of comprehension on the mechanisms related to the behavior of these fluids and, consequently, to the difficulty in predicting it. In this context, this work concerns a review about the heat transfer behavior of nanofluids under single-phase flow, pool boiling, and flow boiling conditions. In general, there is a consensus that the heat transfer coefficient of single-phase flow is enhanced by the addition of nanoparticles to base fluids, although overall benefits of their application cannot be assured due to increases in viscosity. In contrast, either increase or decrease in heat transfer coefficient could be observed for pool and flow boiling conditions. Such behavior can be attributed to surface modifications due to interactions between the bare surface texture and the deposited nanoparticles; however, information on the surface texture is commonly missing in most works. Finally, the main mechanisms reported in the literature pointed out as responsible for the heat transfer coefficient behaviors are summarized, where it can be seen that modifications of transport properties and particles movements impact single-phase flow, while phase-change heat transfer is also influenced by variations of surface characteristics.

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“…According to the application and importance of boiling research, many researches have been done on subcooled boiling in channels. 12–18 Nanofluid properties such as heat capacity, thermal conductivity, density, and viscosity are strongly dependent on the nanoparticle type and concentration of nanoparticles in the nanofluid. A lot of laboratory researches has been done to investigate the effective properties of nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of flow boiling of refrigerant-based nanofluids and proposing correlations for heat transfer

Abedini

Karachi

Jahromi

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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The numerical simulation of subcooled flow boiling of R-113 working fluid has been done for two different nanofluids (R-113/Al2O3, R-113/TiO2) under different volume concentrations (0.5%, 1%, and 3%). The numerical results were compared with experimental results obtained by previous researchers, and the comparison shows that the numerical results are in good accordance. Nucleation site density, bubble departure frequency, and bubble departure diameter, which are three key parameters, are investigated in this study. The results express that these three parameters have the highest variation at low Reynolds numbers. The influence of different nanoparticles concentrations on the variation of the heat transfer coefficient is studied. The results indicate there is an insignificant difference between the effect of 1% and 3% concentrations on the heat transfer coefficient that means an increase of nanoparticles more than 1% concentration cannot improve heat transfer. The effect of different non-drag forces such as lubrication force, turbulent dispersion force, and lift force is also studied. Two correlations are proposed for predicting the convective heat transfer coefficient.

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Experimental investigation and comparison of subcooled flow boiling of TiO₂ nanofluid in a vertical and horizontal tube

Cited by 30 publications

References 30 publications

Boiling heat transfer of nanofluids: A review of recent studies

Boiling heat transfer of nanofluids: A review of recent studies

Nanofluids for heat transfer applications: a review

Numerical investigation of flow boiling of refrigerant-based nanofluids and proposing correlations for heat transfer

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Experimental investigation and comparison of subcooled flow boiling of TiO2 nanofluid in a vertical and horizontal tube

Cited by 30 publications

References 30 publications

Boiling heat transfer of nanofluids: A review of recent studies

Boiling heat transfer of nanofluids: A review of recent studies

Nanofluids for heat transfer applications: a review

Numerical investigation of flow boiling of refrigerant-based nanofluids and proposing correlations for heat transfer

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Product

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Experimental investigation and comparison of subcooled flow boiling of TiO₂ nanofluid in a vertical and horizontal tube