Effect of diameter of metal nanowires on pool boiling heat transfer with FC-72

Kumar, G. Udaya; Suresh, S.; Thansekhar, M.R.; Бабу, П. Динеш

doi:10.1016/j.apsusc.2017.06.135

Cited by 87 publications

(20 citation statements)

References 39 publications

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“…14 studied the saturated pool boiling performance of copper surfaces modified with different treatments, such as emery-polished surface, a finely sandblasted surface, a rough sandblasted surface, an electron beam-enhanced surface, and a sintered surface. Above studies 8–14 clearly indicates that the micro/nanoporous coatings enhance the boiling heat transfer significantly when compared to the ordinary surfaces and the need for improving the surface for heat transfer.…”

Section: Introductionmentioning

confidence: 92%

“…Lee et al 7 reported an increase in heat transfer coefficient in a pool boiling study by creating micropores in aluminium workpiece by the anodizing process. Kumar et al 8 studied the pool boiling heat transfer characteristics of a surface with different diameters of copper nanowires ranging from 35 to 200 nm. Demir et al 9 studied the pool boiling heat transfer of a Si nanostructured surfaces consist of the nanorod.…”

Section: Introductionmentioning

confidence: 99%

“…Kumar et al. 8 studied the pool boiling heat transfer characteristics of a surface with different diameters of copper nanowires ranging from 35 to 200 nm. Demir et al.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer characteristics and flow visualization of anodized flat thermosiphon

Varughese

Raj

Sharifpur

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Use of environmentally safe refrigerants is the need of the hour to minimize the carbon footprints and to reduce the ozone depletion. The application of such environmentally safe refrigerants in the thermosyphon with the micro/nanoporous coating is expected to operate efficiently. In this study, a simple cost-effective anodizing technique to form a uniform thin micro/nanoporous coating at the inner wall of the thermosiphon is undertaken, and the resulting performance enhancement is presented. Also, the effect of fill ratio, heat input and the porous coating on the heat transfer characteristics of flat thermosiphon are studied. The heat transfer coefficient in the evaporator of anodized and nonanodized thermosiphon is enhanced to a maximum of 3587 and 2742 W/m2 K, respectively. The number of pores present in the anodized evaporator surface is estimated as 3.4 × 109. The width (pore size) and depth of pore are measured as 0.25 µm and 16 nm respectively. The porosity of the coating is around 55%, and the contact angle is ≤10°. As a result, the heat transfer coefficient at the evaporator and condenser of anodized thermosyphon is enhanced to a maximum of 24% and 13% respectively, when compared to that of the nonanodized thermosiphon.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Heat transfer characteristics and flow visualization of anodized flat thermosiphon

Varughese

Raj

Sharifpur

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Recently, scientists have found that heat transfer coefficient (HTC) and CHF was not directly enhanced by nanofluids [2][3][4]. They investigated that this improvement is due to changes in the macroscopic surface properties such as roughness and wettability [5][6][7][8][9][10]. In addition, Kim et al [10] showed that the surface parameters (roughness and wettability) promoted film boiling heat transfer and film boiling temperature, but they showed that surfaces coated with diamond nano particles did not significantly change the HTC and CHF.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of the Steel Cylinder Quenching in Water-based Nanofluids

Rahimian

Kazeminejad

Khalafi

et al. 2020

IJE

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In this study, some parameters such as quenching and boiling curves of a stainless steel cylindrical rod 80 mm long and having a diameter of 15 mm were experimentally obtained in saturate pure water and two nanofluids (SiO2 and TiO2) with 0.01 wt%. The cylinder was vertically lowered into the pool of saturated water and its temporal center temperature was measured by a thermocouple. The boiling curves were then obtained by solving a transient one-dimensional inverse heat conduction model and measuring the temperature at the center of the cylinder. The images of the surface morphology and uniformity of the deposited SiO2 and TiO2 nano particles were captured by the scanning electron microscope (SEM). The cooling time during quenching of the cylinder was decreased about 50% by nanoparticles deposition. However, the SiO2 and TiO2 nano particle deposition have similar critical heat flux increment (up to 120%). Film boiling heat transfer rate increased by repetitive quenching in SiO2 nanofluid.

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“…It was found that the monolayer wicks without and with the mushroom post structure provide 20% and 87% CHF enhancements, respectively, compared to the plain surface. In the work of Udaya Kumar et al [2] surfaces were made with an electrodeposition technique. Copper wires with diameters of 35 nm, 70 nm, 130 nm and 200 nm were deposited on copper specimens with a smooth surface.…”

Section: Introductionmentioning

confidence: 99%

Study of pool boiling heat transfer with FC-72 on open microchannel surfaces

et al. 2019

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The paper presents investigations into pool boiling heat transfer for open microchannel surfaces. The experiments were carried out with saturated FC-72 at atmospheric pressure. Parallel microchannels fabricated by machining were about 0.2 to 0.4 mm wide and 0.2 to 0.5 mm deep. Analyzed surfaces with microchannels allowed to obtain heat transfer coefficients within the range of 6.1 – 9.8 kW/m2K, which in relation to the flat surface gives a 3 – 5 - fold increase in HTC. One of the reasons for the increase in the heat transfer coefficient when increasing the heat flux was the growing number of active nucleation sites at the bottom of microchannels and its side surfaces.

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Effect of diameter of metal nanowires on pool boiling heat transfer with FC-72

Cited by 87 publications

References 39 publications

Heat transfer characteristics and flow visualization of anodized flat thermosiphon

Heat transfer characteristics and flow visualization of anodized flat thermosiphon

An Experimental Study of the Steel Cylinder Quenching in Water-based Nanofluids

Study of pool boiling heat transfer with FC-72 on open microchannel surfaces

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