Performance Evaluation of double pipe U -tube heat exchanger with Al2O3 Nano fluids by using CFD

THERMAL ENGINEERING

Heat exchanger is used for heat transfer from hot fluid to cold fluid. The performance of heat exchanger is analysed by of the heat transfer rate and heat transfer coefficient. The main objective of this research work is increased the performance of the heat exchanger by using Nano fluid. CFD analysis is performed for the estimation of heat transfer rate and heat transfer coefficient of Nano-fluid flow in a double pipe U-bend heat exchanger. Theprototype of U-bend heat exchanger was developed using ANSYS 16.0 workbench. In this study Aluminium oxide (Al2O3,), Silicon dioxide (SiO2), and Ethylene Glycol are used as a Nano fluids. The volume fraction of Nano fluids are 0.2%, 0.3% and 0.4% were used in this analysis. The mass flow rate of hot fluid kept constant and the mass flow rate of Nano-fluids are varies from 0.155 kg/sec.The temperatures of Nano-fluids flow in a heat exchanger are kept at 342 K. The results revealed that as volume fraction are increased the heat transfer rate and heat transfer coefficientare increased, and Velocity and pressure are decreased. Based on the numerical results, the highest value of heat transfer coefficient and heat transfer rateis obtain from Al2O3 Nano-fluids with 0.02% volume fraction.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.