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CFD Analysis and Performance of Parallel and Counter Flow in Concentric Tube Heat Exchangers


CFD Analysis and Performance of Parallel and Counter Flow in Concentric Tube Heat Exchangers
Authors : D. Bhanuchandrarao, M. Ashok Chakravarthy, Dr. Y. Krishna, Dr. V .V. Subba Rao, T. Hari Krishna
Publication Date: 25-11-2013

Authors

Author(s):  D. Bhanuchandrarao, M. Ashok Chakravarthy, Dr. Y. Krishna, Dr. V .V. Subba Rao, T. Hari Krishna

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Vol.2 - Issue 11 (November - 2013)

e-ISSN:   2278-0181

Abstract

A Heat Exchanger is a device built for the efficient heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix, or the fluids are directly in contact. Every year research in Heat exchanger technology is growing to develop efficient, compact and economical heat exchangers, all over the world. Updating the community for this development needs an interaction. In last five years Concentric tube heat exchangers utilize forced convection to lower the temperature of a working fluid while raising the temperature of the cooling medium. The purpose of this paper is to use ANSYS FLUENT12.1 software and hand calculations to analyze the temperature drops as a function of both inlet velocity and inlet temperature and how each varies with the other. Each heat exchanger model was built in steps and analyzed along the way until both parallel flow and counter flow heat exchanger models were developed. The results were compared between each model and between parallel and counter flow with fouled piping. Turbulent flow was also analyzed during the development of the heat exchangers to determine its effect on heat transfer. While as expected the fouled heat exchanger had a lower performance and therefore cooled the working fluid less, the performance of the counter heat exchanger unexpectedly of the parallel heat exchanger.

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