Activation volume in the density scaling regime: Equation of state and its test by using experimental and simulation data. Correlation developed from 600 data points of five different nanofluids. Thermal conductivity enhancement of 20.53% and viscosity enhancement of 1.23-times was obtained at 0.5% volume concentration in 20:80% PG/W based nanofluid at a temperature of 60 °C. /LW 1 /MediaBox [0 0 654.95996 852.95996] All content in this area was uploaded by Moham Ed Abdur Razzaq on Aug 24, 2020, zirconia, silica, bismuth oxide), several allotropes of, increasing nanoparticle volume concentration, enhancement of heat transfer coefficient and Nusselt, transfer coefficient, convective heat transfer co-efficient, shell and tube heat exchanger (Figure 1.2) that was used, was developed to analyze the heat transfer of, Overall heat transfer coefficient of nanofluid can be, heat transfer coefficients of the fluids inside and, The effect of nanoparticle concentration on the heat, volume concentration of propylene glycol and, the nanofluid (cold fluid) flow rate should be kept lower, investigation of heat transfer enhancement fo, Hishinuma, “Alteration of Thermal Conductivity. /Creator (DVIPSONE \(32\) 2.1.3 http://www.YandY.com) Shaozhi Zhang, Xiaoyi Yu, Zhaojie Chen, Guangming Chen. 16 0 obj /Resources 56 0 R >> �^#�O1X��|�b[}[��� ����u�+oc[˹�v����)��V^v�����h��sFJyk��t��K�
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JP The hot water flow rate was fixed at 12 Liters/min. It is found that, for a certain mass flow rate (50 kg/min) of tube side and shell side fluid, the highest heat transfer coefficient (h) belongs to Al2O3-W nanofluid and the lowest to CuO-W nanofluid. convective dissolution experiments. The ultra-dispersed diamond (UDD) powders purified with strong acid solution, dry salt and dry sucrose to make UDDs into single nanodiamond (ND) particles. >> Comparison of experimental results with valid theoretical data based on semiempirical equations shows an acceptable agreement. Shang-Yi Chen, Allan N. Soriano, Rhoda B. Leron, Meng-Hui Li. % MWCNTs seeding is because of the kinetics of nanomaterial accumulation and fluid layering. Nanodiamond (ND) nanoparticles of primary particle size of 5–10 nm can be produced in large quantity by using commercially available ultra-dispersed diamond (UDD) powders. Several existing theoretical models for thermal conductivity of nanofluids were compared with the experimental data, but they all showed disagreement. transfer rate of 1250 W and overall heat transfer coefficient of 1934 W/m2K. Mukherjee. /Type /Page 非定常細線加熱法で分散系の有効熱伝導率を測定し, 超微粒子の種類, 粒子濃度, 温度による熱伝導率の変化傾向を明らかにした. 20 0 obj /BitsPerComponent 8 Nanofluids can be used in the heat exchangers to reduce the global energy losses. /Contents 65 0 R endobj Al2O3, CuO and different composition of Al2O3/CuO nanoparticles have been mixed with water to prepare the nanofluid. The curious case of SDS self-assembly in glycerol: Formation of a lamellar gel. >> /X8 21 0 R Preparations of alumina (Al2O3), titania (TiO2) and silica (SiO2) in water have been experimentally conducted in volume concentrations ranging between 1 and 2.5%. << Four thermometers have been used to measure the temperature of fluid. /Resources 62 0 R The effect of particle size on the thermal conductivity of alumina nanofluids. New thermal conductivity and viscosity correlations have been developed based on the experimental data. Will be valuable for heat transfer designs at sub-zero temperatures. International Journal of Heat and Mass Transfer. 3 0 obj Pedro J. Carvalho, Cristofe H. G. Fonseca, Maria-Luísa C. J. Moita, Ângela F. S. Santos, and João A. P. Coutinho . Provide the data for thermal conductivities of propylene glycol/water based nanofluids. Hossein Ali Zarei, Susan Asadi, H. Iloukhani. Heat transfer rate, overall heat transfer coefficient, and effectiveness have increased satisfactorily using different volume concentrations. Chittagong University of Engineering & Technology, Experimental investigation on convective heat transfer and pressure drop of cone helically coiled tube heat exchanger using carbon nanotubes/water nanofluids, Improving the cooling performance of automobile radiator with ethylene glycol water based TiO2 nanofluids, Heat Transfer of Nanofluid in a Double Pipe Heat Exchanger, Preparation, Thermal and Rheological Properties of Propylene Glycol and Water Mixture Based Fe3O4 Nanofluids, Performance investigation of water and propylene glycol mixture based nano-fluids on automotive radiator for enhancement of heat transfer, Experimental measurement of nanofluids thermal properties. A rotameter also has been used for flow regulation. /MediaBox [0 0 656 854] The heat transfer coefficient of both tube side and shell side are calculated using Wilson plots. You can make ads in the Engineering ToolBox more useful to you! Study of the Acoustic and Thermodynamic Properties of 1,2- and 1,3-Propanediol by Means of High-Pressure Speed of Sound Measurements at Temperatures from (293 to 318) K and Pressures up to 101 MPa. To collect data(Air constituents, RH, Temperature etc.) Danijela A. Soldatović, Jelena M. Vuksanović, Ivona R. Radović, Mirjana Lj. Onset of dissolution-driven instabilities in fluids with nonmonotonic density profile. On the choice of analogue fluids in CO
You have to login with your ACS ID befor you can login with your Mendeley account. endobj /Resources 70 0 R /CropBox [0 0 656 854] Figure 1: Thermal Conductivity of Ethylene Glycol-Water Mixtures. The thermal conductivity of nanofluids showed a strong dependence on particle volumetric concentration, particle size, properties of particles and the base fluid and temperature. Propylene Glycol (PG) Propylene Glycol. Thermal Performance of a shell and tube heat exchanger operated with nanofluids has been analytically investigated at different mass flow rates and compared with water as the base fluid. Maarten C. Verbraeken, Mark Cassidy, John T.S. Download : Download high-res image (216KB)Download : Download full-size image. We use cookies to help provide and enhance our service and tailor content and ads. >> Copyright © 2020 Elsevier B.V. or its licensors or contributors. /MediaBox [0 0 656 854] /Metadata 4 0 R This study is mainly focusing on how heat transfer rate, overall heat. >> Suspensions of ZnO, CuO, Fe3O4, TiO2 and Al2O3 nanoparticles in water (W) at 0.03 volumetric fractions have been considered.