Performance Analysis of Annular Fins in Cylindrical Pipes: A Study on Heat Transfer and Fin Efficiency under Various Convection Modes
DOI:
https://doi.org/10.38032/scse.2025.3.79Keywords:
Heat transfer enhancement, Annular fins, Forced convection, Heat transfer coefficient, Fin efficiencyAbstract
This research examined how annular fins fabricated in a cylindrical pipe enhanced heat transfer on the air side. It evaluated the heat transfer coefficient, efficiency of the fins, and velocity of air in both natural and forced convection scenarios. Experimental measurements are used to examine heat transfer properties, and the results are compared with simulations performed using ANSYS software. The geometric models for these studies were created using the SolidWorks software. The experimental setup incorporated thermocouples and a heater regulated by a voltage controller to ensure precise measurement. Using a stainless-steel cylinder of 103.4 mm in length with six annular fins (spaced 23.90 mm) and a radius of 63.40 mm (outer) and 25.6 mm (inner). Studies have demonstrated that, in free convection, the heat transfer coefficient increases as the temperature difference increases. This improves the fin efficiency at higher temperature differentials owing to stronger convective currents. In contrast, forced convection demonstrated an inverse correlation between the heat transfer coefficient and the temperature differential. Elevated air velocities enhance the heat transfer coefficients; however, they simultaneously decrease the fin efficiency owing to the formation of narrower boundary layers near the fin surface.
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[1] S. Unger, M. Beyer, H. Pietruske, L. Szalinski, and U. Hampel, ‘Natural convection heat transfer performance of additively manufactured tube bundle heat exchangers with novel fin design’, Heat and Mass Transfer, vol. 57, no. 7, pp. 1193–1203, Jul. 2021.
[2] E. M. Saber, K. W. Tham, and H. Leibundgut, ‘A review of high temperature cooling systems in tropical buildings’, Build Environ, vol. 96, pp. 237–249, Feb. 2016.
[3] S. Yildiz and H. Ync, ‘An experimental investigation on performance of annular fins on a horizontal cylinder in free convection heat transfer’, Heat and Mass Transfer, vol. 40, no. 3–4, pp. 239–251, Feb. 2004.
[4] M.-Y. Wen and C.-Y. Ho, ‘Heat-transfer enhancement in fin-and-tube heat exchanger with improved fin design’, Appl Therm Eng, vol. 29, no. 5–6, pp. 1050–1057, Apr. 2009.
[5] S. S. Haghighi, H. R. Goshayeshi, and M. R. Safaei, ‘Natural convection heat transfer enhancement in new designs of plate-fin based heat sinks’, Int J Heat Mass Transf, vol. 125, pp. 640–647, Oct. 2018.
[6] S. A. Nada and M. A. Said, ‘Effects of fins geometries, arrangements, dimensions and numbers on natural convection heat transfer characteristics in finned-horizontal annulus’, International Journal of Thermal Sciences, vol. 137, pp. 121–137, Mar. 2019.
[7] M. Sanchouli, S. Payan, A. Payan, and S. A. Nada, ‘Investigation of the enhancing thermal performance of phase change material in a double-tube heat exchanger using grid annular fins’, Case Studies in Thermal Engineering, vol. 34, Jun. 2022.
[8] S. Kiwan and M. A. Al-Nimr, ‘Using Porous Fins for Heat Transfer Enhancement’, J Heat Transfer, vol. 123, no. 4, pp. 790–795, Aug. 2001, doi: 10.1115/1.1371922.
[9] N. Nagarani and K. Mayilsamy, ‘EXPERIMENTAL HEAT TRANSFER ANALYSIS ON ANNULAR CIRCULAR AND ELLIPTICAL FINS’, International Journal of Engineering Science and Technology, vol. 2, no. 7, pp. 2839–2845, 2010.
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Copyright (c) 2025 Al-Amin, Rafiqul Islam Reja , Md. All Amin Sumon, Shamsul Alam , Mohammad Zoynal Abedin (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
All the articles published by this journal are licensed under a Creative Commons Attribution 4.0 International License
