An investigation of the effect of nanoparticle composition and dimension on the heat transfer coefficient during flow boiling of aqueous nanofluids in small diameter channels (1.1 mm)

Moreira, Tiago Augusto; Nascimento, Francisco Júlio do; Ribatski, Gherhardt

doi:10.1016/j.expthermflusci.2017.07.020

Cited by 27 publications

(15 citation statements)

References 51 publications

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“…These results are in agreement with Asadzadeh et al [26], where higher concentrations led to an increase in viscosity and nanoparticles deposition, impairing the heat flux. The influence of the deposition was also highlighted by Moreira et al [22] where a decrease in the heat transfer coefficient was verified in some conditions which the nanoparticles deposition was verified.…”

Section: Convective Heat Transfer Coefficientmentioning

confidence: 67%

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Refrigeration capacity of silver nanofluids under electrohydrodynamic effect oriented to heat removal in machining process

Fragelli

Sanchez

Neto

et al. 2018

Experimental Thermal and Fluid Science

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Nanofluids have been the focus of many laboratories and research centres which seek practical applications for them. Considering the challenges in machining process related with the high temperature in the cutting zone and its influence on the tool life, in this study the nanofluids are employed in a system analogous to the an internally cooled toolholder which can eliminate the use of cutting fluids. In this way, the purpose of this work consists in evaluate the influence of addition of silver nanoparticles in different concentrations in a solution of ethylene glycol/DI-water on the heat transfer coefficient. Moreover, inside the system, the nanofluids were subjected to an electric field in the heat transfer region in order to analyse the influence of the electrohydrodynamic effect. The tests showed that the nanoparticles influenced the fluid viscosity increasing its value up to 20.3% in higher concentrations and also influenced the convective heat transfer coefficient (h). Furthermore, it was presented a positive influence of the electric field enhancing the value of the convective heat transfer coefficient (h) up to 11% when the concentration was 0.039 vol%. On the other hand, the nanoparticle deposition on the heated surface resulted in reduction of the heat transfer coefficient.

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Section: Convective Heat Transfer Coefficientmentioning

confidence: 67%

“…In a research which five different nanofluids were used, Moreira et al [22] analyzed the influence of the nanoparticles on the heat transfer coefficient during flow boiling in a small diameter channel. Attention was given to analyze the effect of nanoparticles deposition on the heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 99%

Refrigeration capacity of silver nanofluids under electrohydrodynamic effect oriented to heat removal in machining process

Fragelli

Sanchez

Neto

et al. 2018

Experimental Thermal and Fluid Science

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“…By [44], with permission from Elsevier T in = 62°C, G = 303 kg m -2 s -1 ), q 00 = 102 kW m -2 by [46], with permission from Elsevier nanofluids increased with using a dilute concentration of nanoparticles. Moreira et al [49] conducted an experimental study to evaluate the flow boiling heat transfer coefficient through a small horizontal tube (i.e., an inner diameter equal to 1.1 mm) by using aqueous nanofluids. They tested several types of spherical nanoparticles (i.e., SiO 2 , Al 2 O 3 and Cu) with various sizes to study the influence of their thermal conductivities and size on the heat transfer coefficient.…”

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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“…Recently, studies are mainly focused on two types of heat transfer enhancement technologies in flow boiling heat transfer [3] : passive technologies, e.g. surface roughness [4] , [5] , surface nanostructures [6] , [7] , microchannel structure [8] , [9] , fluid additives (such as nanoparticles [10] , [11] , etc. ); and active technologies, e.g.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of flow boiling heat transfer enhancement under ultrasound fields in a minichannel heat sink

Fan

Luo

et al. 2021

Ultrasonics Sonochemistry

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An investigation of the effect of nanoparticle composition and dimension on the heat transfer coefficient during flow boiling of aqueous nanofluids in small diameter channels (1.1 mm)

Cited by 27 publications

References 51 publications

Refrigeration capacity of silver nanofluids under electrohydrodynamic effect oriented to heat removal in machining process

Refrigeration capacity of silver nanofluids under electrohydrodynamic effect oriented to heat removal in machining process

Experimental studies of flow boiling heat transfer by using nanofluids

Experimental investigation of flow boiling heat transfer enhancement under ultrasound fields in a minichannel heat sink

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