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Experimental investigation of heat transfer potential of aluminum oxide-water nanofluid using thermophysical properties criteria
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Behrouz Raei *1   , Elnaz sadat Seyedi2 |
1- Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran , behrouz_624@yahoo.com
2- Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran |
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Abstract: (97 Views) |
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The present study investigates the ability to improve the stability and heat transfer performance of water coolant fluid by dispersing aluminum oxide nanoparticles in water. Surfactant-free nanofluid with 4 different volume fractions of 0.05%, 0.5%, 1% and 2% were prepared by two-step method. The stability of the nanofluid was monitored by continuous imaging (visualization) and dynamic light scattering (DLS) techniques. Thermal conductivity, viscosity and density of aluminum oxide-water nanofluid were measured in 4 concentrations and at temperatures of 25, 35 and 45 °C. The results showed that the thermal conductivity and viscosity of aluminum oxide-water nanofluid increases with rising concentration. The viscosity of nanofluids in all concentrations were higher than the base fluid. This is while the increase in viscosity was almost independent of the increase in temperature. The highest percentage increase in the thermal conductivity of nanofluid is equal 49%, which was obtained at a concentration of 2% and a temperature of 45 °C. New correlations with high precision were presented based on the experimental data of thermal conductivity and viscosity of nanofluids. The heat transfer performance and pumping power of nanofluid were analyzed based on several performance criteria. The advantageous results of increasing the heat transfer capability made aluminum oxide-water nanofluid a potential candidate for cooling fluid in practical applications. |
Article number: 6 |
| Keywords: Nanofluid, Heat transfer, Thermal conductivity, Viscosity |
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Full-Text [PDF 1912 kb]
(43 Downloads)
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Type of Study: Research |
Subject:
Heat and Mass Transfer
Received: 2023/11/26 | Accepted: 2024/02/20 | Published: 2024/04/2
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