| Numerical analysis on heat transfer enhancement of Al2O3, TiO2 and CuO water-based nanofluids in a double pipe heat exchanger |
| Paper ID : 1495-UFGNSM-FULL |
| Authors: |
|
Ahmad Barati Chamgordani *1, Neda Gilani2 1Afsaneh Dd.End, 60th Lane, bagh daryacheh St., Esfahan, Iran 2Assistant professor, Fouman Faculty of Engineering, College of Engineering, University of Tehran, Tehran, Iran |
| Abstract: |
| The necessity of saving energy is obvious to anyone and day by day the new methods present for this purpose. This research investigates the heat transfer enhancement for various volume concentration of Al2O3, TiO2 and CuO water-based nanofluids in a double pipe heat exchanger, in co-current and countercurrent flow patterns using ANSYS Fluent software. The cold nanofluids flow in the annulus and the hot pure water flows in the inner pipe. Effect of important parameters such as nanofluids volume concentration and Reynolds number of both fluids on the heat transfer characteristics of the heat exchanger were investigated. In addition, the influence of increasing nanofluid volume fraction on pressure drop was studied. Water is operating fluid, and it flows in the inner pipe with laminar and turbulent flow regimes. The volume concentration of nanofluids were considered 3% and 5%. The results indicate that the higher value of heat transferred between water and nanofluids is depended to the [Al2O3, TiO2 and CuO]-water nanofluids respectively. Also, experiments express that the convective heat transfer coefficient increases remarkably with increase of the nanofluids volume concentration, and under the best condition amount of heat transfer increases about 11.4%. It was also found that the best condition among all is related to the use Al2O3 nanofluid with 5% volume concentration and countercurrent flow patterns. |
| Keywords: |
| Nanofluid, double pipe heat exchanger, heat transfer enhancement, ANSYS Fluent |
| Status : Paper Accepted (Poster Presentation) |
