ANALYSIS OF HEAT TRANSFER ENHANCEMENT IN A SHELL AND TUBE HEAT EXCHANGER PROVIDING FINS ON THE TUBE USING CFD
Author(s):
ABHINAW, Animesh Singhai
Keywords:
Fins, Heat exchanger, Shell and tube, Nano fluids, Heat transfer, ANSYS 14.5, Overall heat transfer coefficient
Abstract
Heat transfer enhancement techniques are very important to save energy and using of optimal energy sources. It is the process of improving the performance of a heat transfer system. In the past decades, heat transfer enhancement technology has been developed and widely applied to heat exchanger applications such as automobiles, chemical industry and process industry. Much effort in the past decades has been aimed to provide economical methods for improving the performance of heat exchanger. Active, passive and compound techniques are used for the enhancement of heat transfer. Nowadays, there have been a large number of attempts to reduce size and cost of heat exchangers, in reducing size and cost of a heat exchanger are basically the heat transfer coefficient and pressure drop. The performance of heat exchangers is essential for reducing size of the system and to make the system more compact and the performance depends on the rate of heat transfer. The high rate of heat transfer is desirable because, it reduces the fuel consumption.
In present work attempts are made to enhance the heat transfer rate in shell and tube heat exchangers by providing oval shaped fins on the tube. For this a shell and tube heat exchanger were used in which 3 tubes with fins are used. Modelling is done using ANSYS. Nanofluid such as Al2O3-H2O is used. The CFD simulated results achieved from the use of the creating fin in tube side in shell and tube type heat exchanger are compared with without fin.Based on the results, providing fins on tube causes the increment of overall heat transfer coefficient which results in the enhancement of heat transfer rate of heat exchanger.
