Experimental Analysis of Heat Transfer Enhancement in Double Tube Heat Exchanger with Air Injection
DOI:
https://doi.org/10.31699/IJCPE.2024.2.4Keywords:
Double tube heat exchanger; Heat transfer enhancement; Air bubbles injection; Number of heat transfer unit (NTU); Overall heat transfer coefficient (U); Effectiveness (ε)Abstract
Double-tube heat exchangers are frequently utilized due to their low assemble and maintenance cost. In order to extract a large amount of thermal energy at minimum time and cost, an active method of air bubble injection was developed to increase the heat transfer rate through vertical double-tube heat. The current study explores the influence of air bubble injection on the thermal efficiency of vertical double tubes at counter flow. There were two main modes were adopted to conduct the experiments. The first mode was done without air injection (single phase). In the second mode, the air was injected into the heat exchanger's outer tube through a ring tube into the annular side of the heat exchanger. Cold water flow rate was ranged as (3, 3.5, 4, 4.5, 5 LPM) with 17°C temperature, while hot water was kept constant at (3LPM) with inlet temperature 70°C, and air was injected with (0.5, 1, 1.5, 2 LPM). Results found that overall heat transfer was enhanced by (41%), NTU (49%), effectiveness enhanced by (44%) and Nusselt number (45.2%).
References
B. A. Abdulmajeed and N. S. Majeed, “Study and Analysis of Concentric Shell and Double Tube Heat Exchanger Using Al 2 O 3 Nanofluid,” Journal of Engineering., vol. 23, no. 9, pp. 50–62, 2017, https://doi.org/10.31026/j.eng.2017.09.04
E. Tavousi, N. Perera, D. Flynn, and R. Hasan, “Heat transfer and fluid flow characteristics of the passive method in double tube heat exchangers: A critical review,” International Journal of Thermofluids, vol. 17, no. January, p. 100282, 2023, https://doi.org/10.1016/j.ijft.2023.100282
S. Pourhedayat, H. Sadighi Dizaji, and S. Jafarmadar, “Thermal-exergetic behavior of a vertical double-tube heat exchanger with bubble injection,” Experimental Heat Transfer., vol. 32, no. 5, pp. 455–468, Sep. 2019, https://doi.org/10.1080/08916152.2018.1540504
S. A. Kaska, H. H. Habeeb, and R. A. Khalefa, “Performance Enhancement of the Vertical Double Pipe Heat Exchanger by Applying of Bubbling Generation on the Shell Side,” Kirkuk University Journal-Scientific Studies., vol. 13, no. 1, pp. 156–171, 2018, https://doi.org/10.32894/kujss.2018.142500
S. M. Talib, F. L. Rashid, and M. A. Eleiwi, “The effect of air injection in a shell and tube heat exchanger,” Journal of Mechanical Engineering Research and Developement., vol. 44, no. 5, pp. 305–317, 2021.
A. A. Abdulrasool, M. M. Alsilbi, A. K. Abbas, and M. W. Aljibory, “Experiment on Heat Transfer Enhancement for a Double Pipe Heat Exchanger with Air Injection of Perforated Turbulator,”Proceedings of the 9th world congress on mechanical ,chemical ,and material Engineering (MCM23), pp. HTFF141, Aug. 2023. https://doi.org/10.11159/htff23.141
V. Holman, “Introduction,” Visual. Resources., vol. 15, no. 3, pp. ix–x, 1999, https://doi.org/10.1080/01973762.1999.9658510
K. E. Amori and J. Shaker Sherza, “An investigation of shell-helical coiled tube heat exchanger used for solar water heating system,” Innovative Systems Design and Engineering., vol. 4, no. 15, pp. 2222–1727, 2013.
N. Sinaga, S. khorasani, K. Sooppy Nisar, and A. Kaood, “Second law efficiency analysis of air injection into inner tube of double tube heat exchanger,” Alexandria Engineering Journal., vol. 60, no. 1, pp. 1465–1476, Feb. 2021, https://doi.org/10.1016/j.aej.2020.10.064
S. L. Ghashim and A. M. Flayh, “Experimental investigation of heat transfer enhancement in heat exchanger due to air bubbles injection,” Journal of. King Saud University. - Engineering Science., vol. 33, no. 7, pp. 517–524, Nov. 2021, https://doi.org/10.1016/j.jksues.2020.06.006
G. R. Ibraheem and A. M. Flayh, “CFD Analysis for Heat Transfer Enhancement in Interfered Double Helical Heat Exchanger,” International Journal of Mechanical Engineering., vol. 7, no. 1, january.2022.
M. Abdul-Wahab, “Heat Transfer in Bubble Column Contactors with immersed Coiled Heater. Iraqi Journal of Chemical and Petroleum Engineering, 1(1), vol.1, no.1, 2000, https://doi.org/10.31699/IJCPE.2000.1.1
M. F. Albayati and R. A. Khalefa, “The Performance of the U Shape Double pipe heat exchanger under effect of using Active Techniques.,” NTU Journal of Engineering and Technology., vol. 1, no. 3, pp. 1–9, 2022, https://doi.org/10.56286/ntujet.v1i3.61
B. A. Sulaymon, A. H., Kendoush, A. A., and Abdul Majeed, “Relationship Between Nusselt and Reynolds Number in Direct Contact Heat Transfer by Condensation of Light Hydrocarbons in Water". Iraqi Journal of Chemical and Petroleum Engineering, vol.3,no.4, 2002, 27–33. https://doi.org/10.31699/IJCPE.2002.4.5
Downloads
Published
Issue
Section
License
Copyright (c) 2024 The Author(s). Published by College of Engineering, University of Baghdad.
This work is licensed under a Creative Commons Attribution 4.0 International License.
