Measurements were conducted over a temperature range of 315-363 K, which is the normal range of operation of . Effect of Al2O3 nanoparticle dispersion on the specific heat capacity of a eutectic binary nitrate salt for solar power applications Yanwei Hu, Yurong He, +1 author D. Wen Published 15 June 2017 Materials Science, Engineering Energy Conversion and Management View via Publisher eprints.whiterose.ac.uk Save to Library Create Alert 88 Citations They concluded that the working fluid was alumina/water (Al 2 O 3 Due to mixing of lower heat capacity particles the . This paper presents new findings on the thermal conductivity, viscosity, density, and specific heatof Al2O3 nanoparticles dispersed intowater and ethylene glycol based coolant used in car radiator. The specific heat capacity measurements were performed using a differential scanning calorimeter (DSC). The optical absorbance test confirms the stability of nanofluids. The effect of nanoparticle concentrations (0.01 wt.%, 0.1 wt.%, and 1 wt.%) on the nanofluid dispersion, stability, and thermal absorption characteristics was investigated . The stability of Al2O3 nanoparticles in the oil is investigated experimentally. We just not only provide the high quality to our customers, but more even important is our best service and the competitive price. The experiments were conducted over temperature range from 35 to 105 C with nanoparticle . Formula: Al 2 O 3. Abstract and Figures In this letter, we have presented an experimental investigation of the specific heat cp of water-based Al2O3 nanofluid with a differential scanning calorimeter. The nanofluids were prepared by the two-step method by using an ultrasonic homogenizer with no surfactants. Other data available: THz IR spectrum. In this paper, the specic heat capacity and viscosity properties of water-based nanouids containing alumina nanoparticles of 47 nm average particle diameter at low concentrations are studied. Ferrari C, Salvetti G, Tombari E and Johari G P 1996 Specific heat relaxation . For specific heat you cannot use define_property but you must use define_specific_heat; however, I think it is not possibile to define specific heat in terms of pressure. Vajjha and Das [22] determined the specif-ic heat of the fluid by dispersing Al2O3, ZnO nanoparticles in propylene glycol-water (volume Information on this page: Solid Phase Heat Capacity (Shomate Equation) References. CAS Registry Number: 1344-28-1. The nanofluid is prepared by mixing Al 2 O 3 nanoparticles into DI-water, and different nanofluids are prepared with nanoparticles mass fractions of 0.1 wt.%, 0.5 wt.%, 1.0 wt.%, 1.5 wt.%, and 2.0 wt.%, respectively. Experiments conducted by Murshed et al. Specific heat also increased with increase in temperatures (Vajjha and Das, 2009). Daha fazla gster Daha az gster Under controlled temperature and humidity conditions . Alumina | Al2O3 | CID 14769 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards . Experimental measurements were carried out at differenttemperatures. The particle mass concentration should not exceed 1 wt.%, however. 8, which illustrates that. Nanofluids are suspension of nanoparticles (less than 100 nm) in the conventional base fluids. . In this work, Al2O3 nanoparticles with various contents (0, 0.5, 1.0, 1.5 wt%) were incorporated into Sn58Bi solder alloy. Abstract In this paper, specific heat measurements are performed for two water-based nanofluids, water-Al2O3-10 nm and water-CuO-29nm, and an Ethylene Glycol-Al2O3-10 nm nanofluid, with different concentrations: 0,24%, 1,03% and 4,05% for water-CuO nanofluid; 2% and 5% for water-Al2O3 nanofluid, and 1%, 2,5% and 5% for EG-Al2O3 nanofluid. In order to measure the thermal conductivity, diameter and viscosity of the obtained nano-fluids, hot wire method (KD2-Pro device), dynamic light . The specific heat capacities of nanoparticles correspond to the bulk, 50 nm and 25 nm CuO, respectively . It turns out experimentally that the specific heat capacity of the analyzed nanoporous Al2O3 is much larger than that of the bulk, which can be interpreted as due to the fact that the surface. Additionally, under the aforementioned thermal equilibrium conditions, the specific heat of nanofluid is given by (17) C n f = (1 ) C b f + C p. (17) Also, the the dynamic viscosity n f is obtained by means of the least squares curve fitting correlation on experimental data given by Wang and Xu ( 1999 ): (18) n f = b f ( 123 . Formula: Al 2 O 3. 15 The effects of the mass fraction of nanoparticles on the cp of the composite nanofluid 16 were analyzed, using both differential scanning calorimetry measurements and 17 molecular dynamics simulations. Moreover, 15 % wt Al2O3 nanoparticles in 0.25PW + 0.75IL gives 21.2 % and 161.16 % higher heat transfer performance in comparison with ionic liquid and pure water respectively at Re = 1900. aluminium oxide. . An almost fully dense nanocrystalline -Al2O3 ceramic with a relative density of 99.5% and an average grain size of 60 nm can be sintered from disperse fine equiaxed -Al2O3 nanoparticles with . MD simulation results show good agreement with experimental data. In the same way, it has been demonstrated that the specific heat capacity. The model also applies well to nanofluids containing mixtures of water and EG, and Al 2 O 3 nanoparticles with different particle size distributions. (2008) used a double hot-wire technique to measure the effective specific heat of different types of nanofluids. all calculations for al2o3 nanoparticles ***** *****/ #include "udf.h" #define FI 0.01 #define RHO_np 3600 #define SI_1 0.9830 #define SI_2 12.959 #define KTC_np 36 # . Nanofluids were prepared with deionised water as base fluid at room temperature by adding nanoparticles at low volume concentration in the range of 0.01%-1% to measure viscosity. CuO nanoparticles prandtl number increased by 124% and at 1% vol. Thermal conductivities and specific heat capacities of nanoparticles of Al2O3 dispersed in water and ethylene glycol as a function of the particle volume fraction and at temperatures between 298 and 338 K were measured. . Notes. The. Several researchers have experimentally attempted to use nanofluids as a working medium in heat pipe using nanoparticles such as silver, CuO, diamond, titanium, nickel oxide as well as gold [1, 2, 5- In this paper, specific heat measurements are performed for two water-based nanofluids, water-Al2O3-10 nm and water-CuO-29nm, and an Ethylene Glycol-A The specific heat capacity of the nanocomposites It has been found that the phonons of certain frequencies are scattered by the boundary of the nanocrystal so that the SHC depends on the size of the nanocrystal [].Nishiguchi and Sakuma [] point out that the phonon dispersion relations, although it is complex to be solved, can be used to predict the SHC of nanoparticles. In summary, it is probably safe to say that the specific heat capacity of salt mixtures is enhanced by every type of nanoparticle used. J Therm Anal Calorim, 147 (2022), pp. The steady-state coaxial cylinders method, using a C80D microcalorimeter (Setaram, France) equipped with special calorimetric vessels, was used for the thermal conductivities . Furthermore, it is also observed that 10 % wt Al2O3 nanoparticles in 0.25PW + 0.75IL shows similar heat transfer performance like ionic liquid at all Re. for shrinking flow with specific mass suction. Details of the methods of preparation may vary (e.g., the temperatures during drying of the samples). Notes. . Download scientific diagram | Variation of electrical conductivity of PEG 400 with Al2O3 nanoparticles mass concentration at 30 C and 40 C from publication: An Experimental Study on Electrical . Inclusion of 6% vol. . The results show the decrease in specific heat of nanofluids with increase in particle volume concentration. Abstract The measurement is based on a differential thermal analysis technique. [Google Scholar] . The microstructure, tensile properties, thermal properties, corrosion resistance, creep behavior and hardness of the synthetic solders were investigated. Al2O3 convective heat transfer coefficient increased by 31.9% [24]. It was found that thermal . Al2O3-ZnO water hybrid nanofluids at 2:1 mixture ratio have a maximum viscosity increase of 96.37% and maximum specific heat decrease of 30.12% at a temperature of 25 C and volume concentration 1.67%. Viscosity increases while specific heat decreases by increasing the volume concentration. Addition of Al2O3 nanoparticle in conventional fluids shows 22.4% increase in thermal conductivity and 13.9% density of the nanofluid at room temperature. Diethylene triamine was used as a hardener. The optimum concentration is found to be 250 ppm, and its specific heat is measured in the temperature range of 27 to 117C and is found to vary from 1.85 to 2.19 J/g C. Low-cost biodiesel enhanced with MWCNT and Al2O3 nanoparticles separately . from 10 C to 50 C). As shown, the specific heat capacity of nanofluid is underestimated using the specific heat capacity of bulk CuO. The present work is an experimental assessment for the isobaric specific heat measurements for the Al2O3 nanoparticle dispersed in a base fluid of different mixture of ethylene glycol and water at 30, 40, 50, and 60 vol% based. University of Alaska Fairbanks Abstract This paper presents measurements of specific heat and density of aluminum oxide (Al2O3) nanoparticles suspended in 60:40 (by mass) ethylene glycol and. The mixture is oscillated for 20 min by using a 450 W ultrasonic oscillation, and then it is heated in a water bath at 40 C. low specific heat of Al2O3 and TiO2 nanoparticles. Go To: Top, Solid Phase Heat Capacity (Shomate Equation), References Data from NIST Standard Reference Database 69: NIST Chemistry WebBook The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. Specific Heat: 451: 955: J/kg.K: 0.34901: 0.739035: BTU/lb.F . This study analyses the density and specific heat of alumina (Al 2O 3)/water nanofluid to determine the feasibility of relative calculations. Combustion, performance and emissions of Acacia concinna biodiesel blends in a diesel engine with variable specific heat ratio. Molecular weight: 101.9613. Download scientific diagram | Properties of Al 2 O 3 nanoparticles. For solar thermal harvesting, an experimental study was performed on the thermal absorption performance of water-based carbon nanotubes (CNTs), Cu, and Al2O3 nanofluids using a halogen lamp-based thermal radiation system. References. In this paper, specific heat measurements are performed for two water-based nanofluids, water-Al2O3-10 nm and water-CuO-29nm, and an Ethylene Glycol-Al2O3-10 nm nanofluid, with different. [14] investigated on an inclined three-dimensional nanofluid based tube-on-sheet flat plate solar collector (FPSC) in numerically modelled manner. Kamaldeep et al [34] studied the effect of concentration on specific heat of Al2O3-H2O nanofluids. In addition, the specific heat of Al2O3-water nanofluid is higher than that for TiO2-water nanofluid due to the highest value of specific heat of Al2O3 nanoparticles compared with that for TiO2 nanoparticle. Aluminum Oxide | Al2O3 | CID 9989226 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety . from publication: Impact of Temperature and Nanoparticle Concentration on Turbulent Forced Convective Heat Transfer of . The specific heat capacity (SHC) at nanoscale has drawn a wide interest. Weight loss in vacuum ranges from 10 -7 to 10 -6 g/cm 2 .sec over a temperature range of 1700 . Its high hardness, excellent dielectric properties, refractoriness and good thermal properties make it the material of choice for a wide range of applications. The specific heat capacity of the silica nanoparticles functionalized with LiNO 3, NaNO 3 and KNO 3 (XNO 3) was measured at 400 C and the results are shown in Fig. This is due to the fact that nanoparticles have lesser heat capacity than pure water. N. Boundary Layer Flow and Heat Transfer of Al2O3-TiO2/Water Hybrid Nanofluid over a Permeable Moving Plate. The change in Coulombic energy contributed to most of the large change in cp. The influence of Al 2 O 3 nanoparticles on the curing of an epoxy thermoset based on diglycidyl ether of bisphenol A was investigated using temperature-modulated differential scanning calorimetry (TMDSC) and rheology. Variation of viscosity with volume concentration of nanoparticles for two nanofluids is shown in Fig.5. Aluminium Oxide (Al2O3) or alumina is one of the most versatile of refractory ceramic oxides and finds use in a wide range of applications. A maximum enhancement of 8.3% on cp was obtained at 2.0 wt.% nanoparticles. The dispersed solid metallic or non-metallic nanoparticles change the thermal properties like thermal conductivity, viscosity, specific heat, and density of the base fluid. Nanouids were prepared with deionised water as base uid at room temperature by adding nanoparticles at low volume concen- Notes. Aluminum Oxide (Al2O3) Nanoparticles/Nanopowder Aluminum oxide is a compound composed of two aluminum atoms and three oxygens bonded together in a hexagonal close packed (hcp) crystal structure. A protective layer was formed in the steel-salt interphase, identified through XRD as Al2O3. 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