Measurement of the specific heat capacity of water-based Al2O3 nanofluid

Zhou, Sheng Qi; Ni, Rui

doi:10.1063/1.2890431

Cited by 541 publications

(244 citation statements)

References 42 publications

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“…For the specific heat experiments [20], a differential scanning calorimeter (DSC, Q20, TA, USA) at an accuracy of 1.0% with a mechanical cooling system (RCS40, TA, USA) measured the specific heat of Al 2 O 3 nanoparticle and nanofluid at 20-70 C. The sample was held in an aluminum sample pan (Tzero Pan, No. : T100915) with a lid (Tzero Hermetic Lid, No.…”

Section: Experimental Setup and Designmentioning

confidence: 99%

“…Nanofluid is a solidliquid mixture, and therefore the concepts of mixing theory for ideal gas mixtures, and classical and statistical mechanism are useful to estimate the nanofluid density. The density of nanoparticles is usually greater than that of the bulk liquid; therefore, according to the concepts of mixing theory for ideal gas mixtures [14][15][16][17][18][19][20] and classical and statistical mechanisms [20][21][22][23][24][25][26][27][28][29], adding nanoparticles to the bulk liquid increases the density of the bulk liquid. Similarly, estimating the specific heat of nanofluid often requires the concepts of mixing theory for ideal gas mixtures and classical and statistical mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Estimation and experimental study of the density and specific heat for alumina nanofluid

Teng

Hung

2012

Journal of Experimental Nanoscience

119

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This study analyses the density and specific heat of alumina (Al 2 O 3 )/water nanofluid to determine the feasibility of relative calculations. The Al 2 O 3 /water nanofluid was produced by the directsynthesis method with cationic chitosan dispersant served as the experimental sample, and was dispersed into three concentrations of 0.5, 1.0 and 1.5 wt.%. This experiment measures the density and specific heat of nanofluid with weight fractions and sample temperatures with a liquid density meter and a differential scanning calorimeter (DSC). To assess the availability of these equations, it then compares the experimental data with the calculated results according to the concepts of mixing theory and statistical mechanism. Comparing the calculated results of density and specific heat with the experimental data, the deviation of density fell within the range of À1.50% to 0.06% and 0.25% to 2.53%, whereas the deviation of specific heat fell within the range of À0.07% to 5.88% and À0.35% to 4.94%, respectively. Calculated results of density and specific heat show a trend of greater deviation with an increased concentration of nanofluid. However, two kinds of density and specific heat of the calculated results fall within an acceptable deviation range in this study.

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Section: Experimental Setup and Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation and experimental study of the density and specific heat for alumina nanofluid

Teng

Hung

2012

Journal of Experimental Nanoscience

119

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“…Determination of the effective specific heat of nanofluids is also important for their practical application in thermal system management. Research previously performed was limited to determining the specific heat of couple of nanofluids [9,10] Namburu et al [9] reported specific heat of nanofluids of silicon dioxide (20 nm) in solution of EG and water mixture. They observed a moderate decrease in specific heat of this nanofluid with increasing particle volume fraction.…”

Section: Introductionmentioning

confidence: 99%

“…The volume fraction mixture-based correlation underpredicts the measured results. Recently, Zhou and Ni [10] measured specific heat of Al 2 O 3 (45 nm)/water-based nanofluid by using a differential scanning calorimeter. Their results showed that the specific heat of this nanofluid decreases significantly with particle volume fraction.…”

Section: Introductionmentioning

confidence: 99%

Determination of effective specific heat of nanofluids

Murshed

2011

Journal of Experimental Nanoscience

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The effective specific heat of several types of nanofluids are measured by transient double hot-wire technique. Sample nanofluids are prepared by suspending 1-5 volume percentages of titanium dioxide (TiO 2 ), aluminium oxide (A1 2 O 3 ) and aluminium (Al) nanoparticles in various base fluids, such as deionised water, ethylene glycol and engine oil. The effective specific heats of these nanofluids were found to decrease substantially with increased volume fraction of nanoparticles. Besides particle volume fraction, particle materials and base fluids also have influence on the effective specific heat of nanofluids. Except Al/engine oil-based nanofluid, predictions of the effective specific heat of nanofluids by the volume fraction mixture rule-based model showed reasonably good agreement with the experimental results. Based on the calibration results obtained for the base fluids, the measurement error is estimated to be within 2.77%.

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“…The thermophysical properties of nanofluids (density, heat capacity, thermal conductivity and viscosity are calculated based on the correlations given in these References [33][34][35][36]. …”

Section: Grid Testing and Model Validationmentioning

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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Measurement of the specific heat capacity of water-based Al2O3 nanofluid

Cited by 541 publications

References 42 publications

Estimation and experimental study of the density and specific heat for alumina nanofluid

Estimation and experimental study of the density and specific heat for alumina nanofluid

Determination of effective specific heat of nanofluids

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

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