Experimental Investigation on Pool Boiling Heat Transfer Performance Using Tungsten Oxide WO3 Nanomaterial-Based Water Nanofluids

Kamel, Mohammed Saad; Lezsovits, Ferenc

doi:10.3390/ma13081922

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…The curves shifted to the left side of the boiling curve of water due to nanoparticle addition in it. The shifting of curves signifies that nanoparticle addition leads to an increase in heat transfer for identical superheat temperature [ 42 , 43 ]. Therefore, the heater performance increased.…”

Section: Resultsmentioning

confidence: 99%

Pool Boiling Amelioration by Aqueous Dispersion of Silica Nanoparticles

et al. 2021

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Non-metallic oxide nanofluids have recently attracted interest in pool boiling heat transfer (PBHT) studies. Research work on carbon and silica-based nanofluids is now being reported frequently by scholars. The majority of these research studies showed improvement in PBHT performance. The present study reports an investigation on the PBHT characteristics and performance of water-based silica nanofluids in the nucleate boiling region. Sonication-aided stable silica nanofluids with 0.0001, 0.001, 0.01, and 0.1 particle concentrations were prepared. The stability of nanofluids was detected and confirmed via visible light absorbance and zeta potential analyses. The PBHT performance of nanofluids was examined in a customized boiling pool with a flat heating surface. The boiling characteristics, pool boiling heat transfer coefficient (PBHTC), and critical heat flux (CHF) were analyzed. The effects of surface wettability, contact angle, and surface roughness on heat transfer performance were investigated. Bubble diameter and bubble departure frequency were estimated using experimental results. PBHTC and CHF of water have shown an increase due to the nanoparticle inclusion, where they have reached a maximum improvement of ≈1.33 times over that of the base fluid. The surface wettability of nanofluids was also enhanced due to a decrease in boiling surface contact angle from 74.1° to 48.5°. The roughness of the boiling surface was reduced up to 1.5 times compared to the base fluid, which was due to the nanoparticle deposition on the boiling surface. Such deposition reduces the active nucleation sites and increases the thermal resistance between the boiling surface and bulk fluid layer. The presence of the dispersed nanoparticles caused a lower bubble departure frequency by 2.17% and an increase in bubble diameter by 4.48%, which vigorously affects the pool boiling performance.

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Section: Resultsmentioning

confidence: 99%

Pool Boiling Amelioration by Aqueous Dispersion of Silica Nanoparticles

et al. 2021

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“…Kamel et al [15] experimentally investigated the performance of pool boiling heat transfer by using tungsten oxide WO3 nanomaterial-based deionized water nanofluids. They made WO3-based water nanofluids by using twostep process.…”

Section: Nanofluids Enhancement On Boilingmentioning

confidence: 99%

“…Figure9: Different boiling phenomena for WO3-based water nanofluids at different volume fractions[15] …”

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confidence: 99%

Effect of Nanofluids on the Enhancement of Boiling Heat Transfer: A Review

Ali

Abedin

Ali

et al. 2021

IJEMM

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Boiling heat transfer can play a vital role in the two-phase flow applications. The analysis of the boiling hat transfer enhancement is of importance in such applications and the enhancement can be mostly conducted by using various active and passive techniques. One type of passive techniques is the enhancement of heat transfer by nanofluids. This article presents an extensive review on the effect of different nanofluids on the enhancement of heat transfer coefficient (HTC) and critical heat flux (CHF) for both pool as well as flow boiling. Nanoparticles addition to a working fluid is done arbitrarily to improve the thermophysical properties which in turn improves heat transfer rate. Numerous works have been done in the studies on nanofluid boiling. Among various nanoparticles, the most frequently used nanoparticles are Al2O3 and TiO2. In the case of binary nanoparticles, the most commonly used combination is Al2O3 and TiO2. After reviewing the relevant literatures, it is found that for pool boiling, the maximum HTC is increased to 138% for TiO2 nanoparticles and the maximum CHF is increased to 274.2% for MWCNTs. Conversely, in flow boiling the maximum HTC is increased to 126% for ZnO nanoparticles and the maximum CHF increased to as 100% for GO nanoparticles. In addition, when two or more nanoparticles in succession or binary nanofluids are used the CHF in pool boiling increased up to 100% for Al2O3 and TiO2 as well as the CHF in flow boiling increased up to 100% for Al2O3, ZnO, and Diamond. Though the information of the coefficient of heat transfer and the critical heat flux varied for different nanofluids and vary from experiment to experiment for each of the nanofluids. This variation happens because the coefficient of heat transfer and the critical heat flux in boiling is dependent upon several factors.

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“…It was observed that by increasing the volumetric concentration from 0.01% to 0.1%, the nucleate boiling curves shifted towards right due to nanoparticle deposition leading to enhanced capillary action. [14] conducted the pool boiling experiments of tungsten oxide water-based nanofluid with volumetric concentrations of 0.005%, 0.01%, and 0.05% on horizontal copper tube. It was observed that by increasing the applied heat flux, the nucleate boiling heat transfer coefficient increases.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of heat transfer characteristics of nanofluids nucleate and film boiling on horizontal flat plate

2021

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In this paper, the heat transfer characteristics of nanofluids nucleate and film boiling is studied experimentally. For this purpose, Al2O3 and SiO2 deionized water-based nanofluids prepared with three volumetric concentrations of 0.1%, 0.3% and 0.5%. The boiling experiments were conducted on a circular and polished copper surface with a diameter of 25 mm. The results showed that the addition of nanoparticles to the base fluid reduced the heat transfer coefficient of nucleate boiling. The boiling of nanofluids increased the surface wettability and the critical heat flux was significantly higher than that of pure deionized water. The Al2O3 deionized water-based nanofluid with a volumetric concentration of 0.5% had the best performance, with a critical heat flux of 44.56% higher than that of pure deionized water. The presence of nanoparticles in the deionized water-based nanofluid improved the heat transfer coefficient of film boiling. The results showed that the stable film boiling for nanofluids starts at higher wall superheat temperature difference than pure deionized water. Among the investigated concentrations, volumetric concentration of 0.5% had best performance for both nanofluids, so that the minimum heat flux of Al2O3 and SiO2 deionized water-based nanofluids were increased 35.01% and 34.40% compared to pure deionized water, respectively.

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Experimental Investigation on Pool Boiling Heat Transfer Performance Using Tungsten Oxide WO3 Nanomaterial-Based Water Nanofluids

Cited by 15 publications

References 46 publications

Pool Boiling Amelioration by Aqueous Dispersion of Silica Nanoparticles

Pool Boiling Amelioration by Aqueous Dispersion of Silica Nanoparticles

Effect of Nanofluids on the Enhancement of Boiling Heat Transfer: A Review

Experimental study of heat transfer characteristics of nanofluids nucleate and film boiling on horizontal flat plate

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