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Thermal performance augmentation of automobile radiator using water-based Al2O3 and CuO nanofluid as a coolant
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
In the recent past, rapid development in the performance of vehicle engine has taken place. Attempts are going on to produce high-efficiency engines at a minimum possible cost in order to fulfill the requirements of customers. However, usage of low thermal conductivity engine coolant limits the ability of cooling system to extract the heat, which ultimately results into difficulties in maintaining the compact size of cooling system. Also, increasing the cooling rate by conventional technologies i.e. providing fins and microchannel has already reached their limits. One of the alternative efforts to improve cooling rate in an automotive radiator to immerge and analyze new types of cooling fluids. Thus, in the present work, the experimental and analytical analysis is carried out to investigate the thermal performance of corrugated finned flat tube car radiator using water-based Al2O3 and CuO Nano fluid. Augmentation of heat transfer process is studied for Nano fluid in comparison to water coolant. The Nano fluid is prepared considering 0.2% Vol. concentration of Nanoparticle with water as a base fluid. A numerical code is also developed in MATLAB. The developed code is validated with the experimental results performed. After validation several numerical runs are performed by varying Reynold number of coolant in the range of 400 to 2000, inlet temperature of coolant in the range of 60oC to 80oC and air velocity in the range of 3 to 20 m/s. Nano fluid concentration is also varied from 2% to 6%. From this study, it is observed that highest heat transfer rate occurs at 6% concentration of nanoparticle in water base fluid i.e. 37.4% for Al2O3 Nano fluid and 35.8% for CuO Nano fluid respectively. Thus, it is found that Al2O3 Nano fluid shows higher heat transfer rate as compared to CuO Nano fluid.