ICMIEE 18-201 Finned-tube Heat Exchanger with Circular , Elliptical & Rectangular Tubes with Water-vapor as Working Fluid

3D numerical study has been conducted on the finned-tube heat exchanger with multiple rows of tubes using ANSYS. The objective of this study is to numerically investigate finned tube heat exchanger for multiple rows of tube with several types of tubes such as circular, elliptical and rectangular tubes with water-vapor. Heat transfer performance analysis has been performed for three and six rows of tube. Heat transfer characteristics were studied with various inlet air velocities. The results show that in the case of water-vapor, modified heat exchanger (HX) 1 & 2 have 3.48% decrease in heat transfer from conventional circular tube heat exchanger. Also modified HX 1 & 2 have 2.11% decrease in heat transfer from conventional elliptical tube heat exchanger. On the contrary, at high inlet velocity, modified HX 2 have 10.45% higher from grouped elliptical tube heat exchanger, for modified HX 6 gives 5.80% higher heat transfer from grouped elliptical tube heat exchanger when N=3. Again in case of water vapor when N=3 modified HX 2 gives 2.38% higher heat transfer than baseline HX 2. When N=6, for water-vapor, all modified heat exchanger have a lower heat transfer than the conventional heat exchanger. For water-vapor, when N=3, all modified heat exchanger has a lower pressure drop than the conventional elliptical heat exchanger.