Experimental investigation of the thermophysical properties of AL2O3-nanofluid and its effect on a flat plate solar collector

Said, Zafar; Sajid, M.H.; Алим, М. А.; Saidur, R.; Rahim, N.A.

doi:10.1016/j.icheatmasstransfer.2013.09.005

Cited by 179 publications

(50 citation statements)

References 45 publications

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“…According to a review study by Ravisankar and Chand [9] and Azmi et al [3], the study of nanofluid properties is important as they contribute significantly to heat transfer performance. Said et al [10] conducted a study on the thermo-physical properties of Al 2 O 3 in EG/water mixture (by mass) nanofluids. They showed that thermal conductivity linearly increased with concentration of nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature on Heat Transfer Coefficient of Titanium Dioxide in Ethylene Glycol-Based Nanofluid

Hamid¹,

Azmi²,

Mamat³

et al. 2015

J. Mech. Eng. Sci.

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Nanofluid as a coolant has potential for use in the heat transfer field because of its augmentation in thermal properties that offers advantages in heat transfer. Research on various working temperatures is still ongoing in the nanofluid field. This study focused on the effect of temperature on heat transfer behavior using titanium dioxide or TiO 2 nanofluid as the working fluid in forced convection. The heat transfer coefficient was determined for flow in a circular tube under constant heat flux boundary conditions. The experiment was conducted with a Reynolds number less than 25000 with concentrations of TiO 2 nanofluid at 0.5%, 1.0% and 1.5%. At 30 o C, the maximum enhancement of 9.72% for 1.5% volume concentration was observed. Enhancements of 22.75% and 28.92% were found at 50 o C and 70 o C, respectively under similar nanofluid concentrations. The nanofluid performance was significantly influenced by working temperature. The heat transfer enhancement of TiO 2 nanofluid was considerably improved at higher working temperature and high concentration because of the improvement of thermal properties.

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Section: Introductionmentioning

confidence: 99%

Effect of Temperature on Heat Transfer Coefficient of Titanium Dioxide in Ethylene Glycol-Based Nanofluid

Hamid¹,

Azmi²,

Mamat³

et al. 2015

J. Mech. Eng. Sci.

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“…Said et al [22] experimentlly investigated the thermal conductivity, viscosity and pressure drop of water, ethylene glycol (EG) and EG + H2O (60:40)-based Al2O3 (13 nm) nanofluids prepared by using ultrasonic dispersion method in the operating temperature range of 25°C to 80°C at low range concentrations of 0.05% to 0.1% for. They observed that deviation of experimental values from estimated values of thermal conductivity of Al 2 O 3 / water nanofluids is considerably high but the experimental values of Al 2 O 3 /EG nanofluids are nearly similar to those of the model calculation as seen in Figure 13.…”

Section: Role Of Base Fluidmentioning

confidence: 99%

“…They attributed the increase of stored energy to the increase in thermal conductivity of the base fluid due to the nanoparticles addition that leads to uniform Figure 18 Variation of the average temperatures of the PV surface at various flow rates for water and three different concentrations of nanofluid. Said et al [22] Al2O3, water, ethylene glycol Solar collector Their results showed that nanofluids pressure drop at a low concentration flowing in a solar collector is slightly higher than the base fluid.…”

Section: Using Nanofluids In Solar Pondmentioning

confidence: 99%

Performance evaluation of nanofluids in solar energy: a review of the recent literature

Bozorgan

Shafahi

2015

Micro and Nano Syst Lett

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Utilizing nanofluid as an absorber fluid is an effective approach to enhance heat transfer in solar devices. The purpose of this review is to summarize the research done on the nanofluids' applications in solar thermal engineering systems in recent years. This review article provides comprehensive information for the design of a solar thermal system working at the optimum conditions. This paper identifies the opportunities for future research as well.

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“…They pointed out that he efficiency of flat-plate solar collector increased by 28.3% using 0.2 wt% Al2O3 and 15.63% using 0.4 wt% Al2O3 with surfactant compared to water. Experimental analyses on performance of a flat-plate solar collector using different types of nanofluid were carried out by Polvongsri and Kiatsiriroat [22], Said et al [23] and Chaji et al [24]. It was concluded that the effects of nanofluids with low volume fractions were insignificant on the pumping power and pressure drop of a solar collector.…”

Section: Introductionmentioning

confidence: 99%

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

et al. 2017

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Abstract.A numerical investigation is performed using finite volume method to study the laminar heat transfer in a three-dimensional flat-plate solar collector using different nanofluids as working fluids. Three nanofluids with different types of nanoparticles (Ag, MWCNT and Al2O3 dispersed in water) with 1-2 wt% volume fractions are analyzed. A constant heat flux, equivalent to solar radiation absorbed by the collector, is applied at the top surface of the absorber plate. In this study, several parameters including boundary conditions (different volume flow rates, different fluid inlet temperatures and different solar irradiance at Skudai, Malaysia), different types of nanoparticles, and different solar collector tilt angles are investigated to identify their effects on the heat transfer performance of FPSC. The numerical results reveal that the three types of nanofluid enhance the thermal performance of solar collector compared to pure water and FPSC with Ag nanofluid has the best thermal performance enhancement. For all the cases, the collector efficiency increased with the increase of volume flow rate while fluid outlet temperature decreased. It is found that FPSC with tilt angle of 10° and fluid inlet temperature of 301.15 K has the best thermal performance.

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Experimental investigation of the thermophysical properties of AL2O3-nanofluid and its effect on a flat plate solar collector

Cited by 179 publications

References 45 publications

Effect of Temperature on Heat Transfer Coefficient of Titanium Dioxide in Ethylene Glycol-Based Nanofluid

Effect of Temperature on Heat Transfer Coefficient of Titanium Dioxide in Ethylene Glycol-Based Nanofluid

Performance evaluation of nanofluids in solar energy: a review of the recent literature

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

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