Enhancement of nanofluid stability and critical heat flux in pool boiling with nanocellulose

Hwang, Won-Ki; Choy, Seunghwan; Song, Sub Lee; Lee, Jae-Young; Hwang, Dong Soo; Lee, Kwon-Yeong

doi:10.1016/j.carbpol.2019.03.023

Cited by 31 publications

(7 citation statements)

References 62 publications

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“…A vessel with a size of 275 × 200 × 135 mm was filled with DI water and CNF solutions with concentrations of 0.01%, 0.1% and 0.5%. These discretized domains are obtained from the previous researches where significant differences during heat transfer were found due to the different weight percentage of the CNF solution [ 10 , 11 , 12 ]. The pool temperature was maintained by two hot plates below the vessel and monitored using a K-type thermocouple (TC2).…”

Section: Experimental Approachmentioning

confidence: 99%

“…The van der Waals forces and surface charges in water accelerate the aggregation and creation of clusters [ 9 ]. Moreover, it has been reported that the low dispersion stability of inorganic nanoparticles in solution reduces the thermal conductivity of the nanofluids and hence mitigates the boiling performance of the solution [ 10 ]. However, it is difficult to overcome the challenges of inorganic nanoparticles arising from their complex preparation and dispersibility in water.…”

Section: Introductionmentioning

confidence: 99%

“…However, it is difficult to overcome the challenges of inorganic nanoparticles arising from their complex preparation and dispersibility in water. Hwang et al [ 10 ] used cellulose nanofiber (CNF) as a solute to prepare nanofluids and studied the heat transfer characteristics of the solutions. The CNFs were dissolved with high stability, unlike other inorganic nanoparticles, owing to their high zeta potential.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

2022

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This study investigates the quenching behavior and heat transfer characteristics of a copper cube immersed in cellulose nanofiber (CNF) solutions. The heat transfer performance of CNF solutions during boiling has been examined in several studies, but the quenching behavior of CNF solutions, which is an important heat transfer method, has not been evaluated. In this study, four copper cubes with the same dimensions and four different quenchants (deionized water and 0.01%, 0.1% and 0.5% CNF solutions) were prepared. A copper cube heated to greater than 600 °C was submerged three times in the quenchant. This was repeated with different copper cubes in each of the quenchants. The time at which the heated copper cube convectively transferred heat to the surroundings was recorded. The cooling time was shortest when the cube was immersed in a 0.5% CNF solution for the first time. The average cooling time for quenching in the 0.5% CNF solution was 30.3% shorter than that in DI water. In this study, film boiling during quenching was thoroughly observed and analyzed to explain the cause of enhancement in heat transfer efficiency.

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Section: Experimental Approachmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

2022

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“…22 As the viscosity of oil-based nanofluids could be crucial for stability and scattering of the nanofluid, so oil-based nanofluids gave better enhancement in the transport of energy. 23,24 Enhancement of thermal conductivity is achieved through nanoparticles when that base fluid is used whose thermal conductivity is low, this fact is revealed out by Hwang et al 25 Turgut et al 26 checked thermal conductivity of nanoparticles of water-based TiO 2 nanofluids while Mintsa et al 27 presented his study of new temperature-dependent thermal conductivity water-based nanofluids. Furthermore, several scholars [28][29][30][31][32][33] depicted thermal conductivity with nanofluid, the dependence of the thermal conductivity of nanoparticle-fluid mixture, enhancement of thermal conductivity with CNTs, the thermal conductivity of alumina nanofluids, and thermal conductivity of Fe nanofluids depending on the cluster size of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale energy transport of inclined magnetized 3D hybrid nanofluid with Lobatto IIIA scheme

et al. 2021

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Key developments in the field of nanotechnology have drawn the attention of many scholars toward the interaction of nanoparticles due to their capturing applications in solar energy systems and thermal engineering. Larger consumption of energy posed a challenge for thermal science, so thermal engineering is trying to solve this issue by increasing the thermal conductivity of the fluid. The thermal conductivity of conventional fluid is increased by incorporating the nanoparticles in the base fluid. Keeping this in mind, the present research project addresses the utilization of nanoparticles in a steady three-dimensional rotating flow of magnetohydrodynamic water-based hybrid fluid over an extending sheet. Nanoparticles of aluminum oxide (Al 2 O 3 ) and silver (Ag) are being used with water (H 2 O) as base fluid. The velocity of nanoparticles is being captured under the influence of an inclined magnetic field and the transport of heat is scrutinized through thermal radiation. The physical model generates partial differential equations and then transported into an equivalent set of a nonlinear ordinary differential equations. The purpose of numerical computation is made by the Lobatto IIIA method, which is

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“…With the increase of the nanofluid concentration and nanoparticle size, they observed that the surface wettability parameter increased. Hwang et al (2019) prepared an aqueous nanofluid using oxidized cellulose nanofibers and investigated the enhancement rates in CHF and stability of nanofluids, experimentally. For nanoparticle characterization, they measured zeta potential and degree of substitution and observed the nanosized cellulose nanofibers by electron microscopy.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement in pool boiling and condensation using h-BN/DCM and SiO₂/DCM nanofluids: experimental and numerical comparison

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2020

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Purpose The purpose of this study is to experimentally and numerically scrutinize the heat transfer enhancement in pool boiling and condensation by changing the hydrophilicity or hydrophobicity properties of the working fluid, i.e. by use of nanofluid solution. Design/methodology/approach For specifying the effects of nanoparticle concentration on heat transfer properties, two different nanofluid solutions (h-BN/DCM and SiO2/DCM) at three different volumetric concentrations were prepared and tested under different heat flux conditions. Boiling curves, alterations in pressure with heat flux and heat transfer coefficients for both boiling and condensation processes were obtained and viscosity measurements were performed for dichloromethane (DCM) and each working fluid was prepared. In addition, a series of numerical simulations, via computational fluid dynamics approach, was performed for specifying the evaporation–condensation phenomena and temperature and velocity distributions. Findings Nanoparticle addition inside the base fluid increased the thermal characteristics of the base fluid significantly. For the experimental results of h-BN/DCM nanofluid, the increment rate in heat transfer coefficient for saturation boiling, after-saturation boiling and condensation processes was found as 27.59%, 14.44% and 15%, respectively. Originality/value The novelty of this comparison study is that there is no such experimental and numerical comparison study in literature for DCM fluid, which concentrates on thermal performance enhancement and compares the effect of different kinds of nanoparticles on heat transfer characteristics for boiling–condensation processes.

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Enhancement of nanofluid stability and critical heat flux in pool boiling with nanocellulose

Cited by 31 publications

References 62 publications

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

Nanoscale energy transport of inclined magnetized 3D hybrid nanofluid with Lobatto IIIA scheme

Heat transfer enhancement in pool boiling and condensation using h-BN/DCM and SiO₂/DCM nanofluids: experimental and numerical comparison

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Enhancement of nanofluid stability and critical heat flux in pool boiling with nanocellulose

Cited by 31 publications

References 62 publications

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

Experimental Study on the Quenching Behavior of a Copper Cube in the Cellulose Nanofiber Solution

Nanoscale energy transport of inclined magnetized 3D hybrid nanofluid with Lobatto IIIA scheme

Heat transfer enhancement in pool boiling and condensation using h-BN/DCM and SiO2/DCM nanofluids: experimental and numerical comparison

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Heat transfer enhancement in pool boiling and condensation using h-BN/DCM and SiO₂/DCM nanofluids: experimental and numerical comparison