Numerical Analysis of Triple Concentric Tube Heat Exchanger using Dimpled Tube Geometry

Abstract

Computational Fluid Dynamic (CFD) is a useful tool in solving and analyzing problems that involve fluid flows, while triple tube concentric tube heat exchanger is the most common type of heat exchanger and widely use in chemical and food processes. In this current research to studying the Numerical Analysis of Triple Concentric Tube Heat Exchanger Using spherical shape of the Dimpled Tube Geometry, it's to create modeling and meshing the Plain and spherical dimpled geometry of triple tube concentric tube heat exchanger using the CFD package Gambit 2.4 and the boundary condition to be set before been simulate in Fluent 6.2 based on the parameters. The Hot water is flowing through in an Intermediate tube and Cold water is flowing through in an inner tube and outer tube at different Reynolds numbers. Triple Concentric tube heat exchanger performance is compared with plain and spherical shape dimpled triple concentric tube heat exchanger using CFD. From this result the simulation of in triple concentric tube heat exchanger enhancing spherical dimpled tube model to increasing the overall heat transfer coefficient, effectiveness and heat transfer rate compare to plain tube, and also calculate the flow characteristics of velocity, Nusselt number, pressure drop and Friction factor of the triple concentric tube heat exchanger spherical dimpled tube.