Wide range parametric study for the pool boiling of nano-fluids with a circular plate heater

Jo, Byeongnam; Jeon, Pilsoo; Yoo, Jae‐Hyuck; Kim, H. J.

doi:10.1007/bf03181941

Cited by 31 publications

(9 citation statements)

References 9 publications

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“…Boiling curves shifted towards right for all nanofluids which shows enhancement in CHF. On the other hand, in the case of silver nanofluids, CHF enhanced more in small dispersion of nano i. e. at 0.01 g/l fluids as compared to large dispersion but after these point CHF decreases [65]. Nitric acid introduces the higher electrostatic force in TiO 2water nanofluids.…”

Section: Boiling Of Nanofluid Through Circular Platementioning

confidence: 91%

A comprehensive review on pool boiling heat transfer using nanofluids

Khan

Ali

2019

Therm sci

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Nanofluids are suspensions of nanoparticles with small concentration spread in base fluids such as water, oil and ethylene glycol. Nanofluid boiling is an important research area which provides many chances to explore new frontiers but also poses great challenges. Over the last decade, various studies have been carried out on pool boiling of nanofluids for the enhancement of critical heat flux which is otherwise limited by the use of base fluids. Several efforts have been made in the literature on nanofluid boiling, however, data on the boiling heat transfer coefficient and the critical heat flux have been unpredictable. Current study is a review of the status of research work on effects of nanofluids on heat transfer coefficient and critical heat flux. An emphasis is put in a review form on the recent progresses in nanofluid heat transfer coefficient and critical heat flux of pool boiling. This study also focuses on advancements in nanofluids, their properties and various parameters affecting boiling critical heat flux and heat transfer coefficient. At the end correlations used by different researchers to find out the critical heat flux and heat transfer coefficient are listed.

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Section: Boiling Of Nanofluid Through Circular Platementioning

confidence: 91%

A comprehensive review on pool boiling heat transfer using nanofluids

Khan

Ali

2019

Therm sci

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“…Theoretical studies, as well as the experimental works, suggested several possible mechanisms to understand and to explain the enhanced thermal conductivity of nanofluids [10]. Additionally, research into the effect of nanoparticles on pool boiling characteristics and on the critical heat flux was also actively conducted under various experimental conditions [11][12][13]. While many people focused on the thermal conductivity and the boiling heat transfer of nanofluids, relatively a small number of studies was performed to measure specific heat capacity of the nanofluids.…”

Section: Introductionmentioning

confidence: 98%

Enhanced Specific Heat Capacity of Molten Salt-Based Carbon Nanotubes Nanomaterials

Banerjee

2015

Journal of Heat Transfer

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This study aims to investigate the specific heat capacity of a carbonate salt eutecticbased multiwalled carbon nanomaterial (or high temperature nanofluids). The specific heat capacity of the nanomaterials was measured both in solid and liquid phase using a differential scanning calorimetry (DSC). The effect of the carbon nanotube (CNT) concentrations on the specific heat capacity was examined in this study. The carbonate molten salt eutectic with a high melting point around 490 C, which consists of lithium carbonate of 62% and potassium carbonate of 38% by the molar ratio, was used as a base material. Multiwalled CNTs were dispersed in the carbonate salt eutectic. A surfactant, sodium dodecyl sulfate (SDS) was utilized to obtain homogeneous dispersion of CNT into the eutectic. Four different concentrations (0.1, 0.5, 1, and 5 wt.%) of CNT were employed to explore the specific heat capacity enhancement of the nanomaterials as the concentrations of the nanotubes varies. In result, it was observed that the specific heat capacity was enhanced by doping with the nanotubes in both solid and liquid phase. Additionally, the enhancements in the specific heat capacity were increased with increase of the CNT concentration. In order to check the uniformity of dispersion of the nanotubes in the salt, scanning electron microscopy (SEM) images were obtained for pre-DSC and post-DSC samples. Finally, the specific heat capacity results measured in present study were compared with the theoretical prediction.

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“…In 1995, Choi and Eastman proposed nanofluids as innovative heat-transfer fluids, owing to their enhanced thermal conductivity [2]. In the early 2000s, the dramatic increase of the critical heat flux in pool boiling of nanofluids gave rise to the consideration of nanofluids as an alternative to conventional heat-transfer fluids [3,4]. After those publications, related studies into the thermal property and boiling characteristic have been actively performed under various experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

Kim¹,

Jo²

2018

Applied Sciences

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An anomalous increase of the specific heat was experimentally observed in molten salt nanofluids using a differential scanning calorimeter. Binary carbonate molten salt mixtures were used as a base fluid, and the base salts were doped with graphite nanoparticles. Specific heat measurements of the nanofluids were performed to examine the effects of the composition of two salts consisting of the base fluid. In addition, the effect of the nanoparticle concentration was investigated as the concentration of the graphite nanoparticles was varied from 0.025 to 1.0 wt %. Moreover, the dispersion homogeneity of the nanoparticles was explored by increasing amount of surfactant in the synthesis process of the molten salt nanofluids. The results showed that the specific heat of the nanofluid was enhanced by more than 30% in the liquid phase and by more than 36% in the solid phase at a nanoparticle concentration of 1 wt %. It was also observed that the concentration and the dispersion homogeneity of nanoparticles favorably affected the specific heat enhancement of the molten salt nanofluids. The dispersion status of graphite nanoparticles into the salt mixtures was visualized via scanning electron microscopy. The experimental results were explained according to the nanoparticle-induced compressed liquid layer structure of the molten salts.

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Wide range parametric study for the pool boiling of nano-fluids with a circular plate heater

Cited by 31 publications

References 9 publications

A comprehensive review on pool boiling heat transfer using nanofluids

A comprehensive review on pool boiling heat transfer using nanofluids

Enhanced Specific Heat Capacity of Molten Salt-Based Carbon Nanotubes Nanomaterials

Anomalous Increase in Specific Heat of Binary Molten Salt-Based Graphite Nanofluids for Thermal Energy Storage

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