Numerical Analysis Of Tube Fin Heat Exchanger Using Nanofluids
Nanofluids are potential heat transfer fluids with higher thermal conductivity and better thermophysical properties and can be applied in heat exchanger for better performances. The work is about working of nanofluids, their performance comparison with basefluid consisting of mixture of Water-80% & EG (Ethylene Glycol)-20%. A theoretical analysis is presented to investigate the variation in thermophysical properties of basefluid when nanoparticles are added. In the present work, the nanoparticles like SiO2, TiO2, Al2O3 and Cu are mixed with basefluid and used in tube fin heat exchanger. Its effects on thermophysical properties and heat transfer characteristics are compared with base fluid. This study focuses on the application of Water-EG based nanofluids in an automotive cooling system. Input data, nanoparticles properties and empirical correlations are obtained from literatures to investigate the heat transfer enhancement of an automotive car radiator operating with nanofluids based coolant. Different correlations are used to find out thermal conductivity, specific heat and density of nanofluids. To carry out the analysis, program is generated in C-language. It is observed that, overall heat transfer coefficient and heat transfer rate in engine cooling system increases with the use of nanofluids based coolants compared to Water-EG mixture alone which implies that the size of the radiator can be reduced for the same performance.
Index Terms- Heat Transfer, Nanofluid, Thermal Conductivity, Tube Fin Heat Exchanger, Water-EG Mixture.