CFD Analysis for the Enhancement of Heat Transfer in a Heat Exchanger with Twisted Tape Inserts and Dimpled Tube

In the concentric tube heat exchanger, by using dimpled tube for outer shell and by providing twisted tapes in the inner tube, the heat transfer, Reynolds number, temperature, pressure, velocity variations are analysed. Twisted tapes and dimpled tube are used to augment the heat transfer by creating turbulence in the fluid flow. In this report the analysis is conducted by two cases comprised of counter flow arrangement with the dimpled tube i.e outer shell is made of copper, the inner tube is made of aluminium and the twisted tape is made by copper, In the second case comprised with the arrangement of dimpled tube i.e outer shell is made of aluminium, the inner tube is made of copper and the twisted tapes is made by aluminium. The hot water is passed inside inner tube and cold water is passed between the annulus in counter flow in both cases. Out of two cases is compared with concentric tube heat exchanger without twisted tape and without dimple tube are compared. Here using Fluent in ANSYS software the analysis are done.