Study on Pool Boiling Heat Transfer of Nano-Particle Suspensions on Plate Surface

Shi, Mingheng; Shuai, Mou; Chen, Z. Q.; Li, Qiang; Xuan, Yimin

doi:10.1615/jenhheattransf.v14.i3.40

Cited by 46 publications

(13 citation statements)

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“…The thermal conductivity of Cu nanoparticle (398 W m À1 ÁK À1 ) is four orders of magnitude higher than that of R113 (0.064 W m À1 ÁK À1 ), so the thermal conductivity of Cu-R113 nanofluid is larger than that of pure R113, causing the enhancement of micro-layer evaporation [26], which leads to the enhancement of the nucleate pool boiling heat transfer.…”

Section: Nucleate Pool Boiling Heat Transfer Coefficients Of Cu-r113 mentioning

confidence: 99%

Effect of surfactant additives on nucleate pool boiling heat transfer of refrigerant-based nanofluid

Peng

Ding²,

Hu³

2011

Experimental Thermal and Fluid Science

135

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a b s t r a c tEffect of surfactant additives on nucleate pool boiling heat transfer of refrigerant-based nanofluid was investigated experimentally. Three types of surfactants including Sodium Dodecyl Sulfate (SDS), Cetyltrimethyl Ammonium Bromide (CTAB) and Sorbitan Monooleate (Span-80) were used in the experiments. The refrigerant-based nanofluid was formed from Cu nanoparticles and refrigerant R113. The test surface is horizontal with the average roughness of 1.6 lm. Test conditions include a saturation pressure of 101.3 kPa, heat fluxes from 10 to 80 kW m À2 , surfactant concentrations from 0 to 5000 ppm (parts per million by weight), and nanoparticle concentrations from 0 to 1.0 wt.%. The experimental results indicate that the presence of surfactant enhances the nucleate pool boiling heat transfer of refrigerant-based nanofluid on most conditions, but deteriorates the nucleate pool boiling heat transfer at high surfactant concentrations. The ratio of nucleate pool boiling heat transfer coefficient of refrigerant-based nanofluid with surfactant to that without surfactant (defined as surfactant enhancement ratio, SER) are in the ranges of 1.12-1.67, 0.94-1.39, and 0.85-1.29 for SDS, CTAB and Span-80, respectively, and the values of SER are in the order of SDS > CTAB > Span-80, which is opposite to the order of surfactant density values. The SER increases with the increase of surfactant concentration and then decreases, presenting the maximum values at 2000, 500 and 1000 ppm for SDS, CTAB and Span-80, respectively. At a fixed surfactant concentration, the SER increases with the decrease of nanoparticle concentration. A nucleate pool boiling heat transfer correlation for refrigerant-based nanofluid with surfactant is proposed, and it agrees with 92% of the experimental data within a deviation of ±25%.

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Section: Nucleate Pool Boiling Heat Transfer Coefficients Of Cu-r113 mentioning

confidence: 99%

Effect of surfactant additives on nucleate pool boiling heat transfer of refrigerant-based nanofluid

Peng

Ding²,

Hu³

2011

Experimental Thermal and Fluid Science

135

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“…They concluded that the ratio of the average surface roughness to the average particle size governs whether or not enhancement or deterioration occurs. Shi et al (2007) studied boiling of nanofluids on a horizontal plate using Fe-water and Al 2 O 3 -water suspensions. They observed larger enhancement for the higher conductivity Fe-water solution.…”

Section: Introductionmentioning

confidence: 99%

Nanofluid boiling: The effect of surface wettability

Coursey

Kim

2008

International Journal of Heat and Fluid Flow

235

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“…In fact, recent research [11,12] showed that the liquid surface tension decreased with increasing nanoparticle concentration inside the [11] and Shi et al [12], those concentrations are high enough to reduce the surface tension and hence the adhesion energy. Besides, Wen and Ding [13] did not observe any nanoparticle deposition or any noticeable changes on the test surface.…”

Section: Surface Coating With Nanofluids 239mentioning

confidence: 99%

Surface Coating with Nanofluids: The Effects on Pool Boiling Heat Transfer

Phan

Caney

Marty

et al. 2010

Nanoscale and Microscale Thermophysical Engineering

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International audienceRecent research has confirmed a buildup of a thin layer of nanoparticles on the heated surface during nucleate boiling in nanofluids. Most of these studies report no change of heat transfer and, even worse, the presence of heat transfer deterioration. However, a few others report a heat transfer enhancement. In order to understand these controversial results, experiments were performed to explore the mechanism of surface coating during nucleate boiling in nanofluids. The thickness of the nanoparticle layer was observed to depend on the nanoparticles concentration and the experiment duration. Compared to a clean surface, the wettability of the surfaces with a TiO2 nanoparticle layer has been significantly improved. However, up to 50% of heat transfer coefficient deterioration was observed with TiO2-coated surfaces in water pool boiling. An explanation is proposed that involves the role of adhesion energy on heat transfer

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Study on Pool Boiling Heat Transfer of Nano-Particle Suspensions on Plate Surface

Cited by 46 publications

References 0 publications

Effect of surfactant additives on nucleate pool boiling heat transfer of refrigerant-based nanofluid

Effect of surfactant additives on nucleate pool boiling heat transfer of refrigerant-based nanofluid

Nanofluid boiling: The effect of surface wettability

Surface Coating with Nanofluids: The Effects on Pool Boiling Heat Transfer

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