Multi-objective Optimization of Double pipe Heat Exchangers from the Point of View of Efficiency and Economics

Articles in Press

Document Type : Research Article

Authors

Faculty of engineering, Shohadaye Hoveizeh Campus of Technology, Shahid Chamran University of Ahvaz, DashteAzadegan, Iran.

Abstract

The purpose of this study is to investigate the cost and efficiency of a double pipe heat exchanger. Furthermore, by utilizing NSGA2, the operational expenses were minimized, and the efficiency was maximized. The cold fluid mass flow rate, outer tube diameter, inner tube diameter, and cold fluid outlet temperature are selected as design variables. Additionally, in this research, the Witte-Shamsundar efficiency and performance index were studied for the double pipe heat exchanger, and the impact of various parameters was examined. Optimizing results showed that the efficiency and heat transfer rate increased 21% and 43%, respectively. In addition, the operational cost experienced a reduction of approximately 58%. The findings indicate that, as the average velocity of the hot fluid increases, the number of transfer units increases, resulting in an increase in the efficiency. Also, for a given inner tube diameter, the highest Witte-Shamsundar efficiency is achieved when the hot side mass flow rate is equal to the cold side mass flow rate. The Witte-Shamsundar efficiency decreases with increasing the hot fluid inlet temperature. As the cold side mass flow rate increases, the performance index of a double pipe heat exchanger decreases. It is found that if a double pipe heat exchanger is required to increase the mass flow rate of hot fluid, provided that the mass flow rate of hot fluid is greater than that of cold fluid, the cost increase will be minimal. Moreover, it has been observed that the present investigation has yielded significantly more optimal outcomes.

Keywords

Main Subjects

Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 March 2024

Files

Share

How to cite

Statistics