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Numerical investigation of convection in tubes with aluminium and carbon steel fins: evaluating the assumption of convective heat transfer coefficient as that for the tube without fins and relating physical processes with the optimum spacing between fins

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Abstract

Finned tubes exist in diverse geometric configurations, usually the convective heat transfer coefficient is unknown and approximated as that for a geometry similar to the actual one. This paper presents a numerical investigation about the convective heat transfer in a horizontal finned tube. Ten geometric configurations were considered, which differed on the distance between fins, and two materials were analysed for the fins: aluminium and carbon steel. Eleven different values were considered for the temperature difference between the base of the tube and air. Therefore, a total of one hundred and ten different conditions were studied, for each material. The flow regime was laminar. The analysis showed that approximating the convective heat transfer of the finned tube as that for a tube without fins, for which correlations are available in the literature, can lead to significant errors. The maximum difference verified was for the spacing between fins equal to 2 mm, for which the convective heat transfer coefficient was about seven times lower than that for the tube without fins. For spacings equal to 6 mm and 8 mm, associated to the maximum heat transfer rate, the convective heat transfer coefficient for the tube without fins was about 30% to 50% higher than that for the finned tube. The common assumption of uniform fins surface temperature was also evaluated for the two considered materials the fins were made of. The results showed that for the steel fins the approximation leads to an error of about 10%, while for aluminium it is only about 3%. Results that allow a better understanding of the physical phenomena related to the occurrence of the optimum spacing between fins, which maximize the heat transfer, are also presented and analysed.

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References

  1. Kakaç S, Liu H, Parmuanjaroenkij A (2012) Heat exchangers: selection, rating and thermal design. Taylor and Francis Group, New York

    Book  Google Scholar 

  2. Thulukkanam K (2013) Heat exchanger design handbook, 2nd edn. Taylor and Francis Group, New York

    Book  Google Scholar 

  3. Kern DQ, Kraus AD (1972) Extended surface heat transfer. McGraw-Hill, New York

    Google Scholar 

  4. Antonios I, Zografos J, Sunderland E (1990) Natural convection from pin fin arrays. Exp Therm Fluid Sci 3(4):440–449

    Article  Google Scholar 

  5. Aihara T, Maruyama S, Kobayakawa S (1990) Free convective/radiative heat transfer from pin-fin arrays with a vertical base plate (general representation of heat transfer performance). Int J Heat Mass Transf 33(6):1223–1232

    Article  Google Scholar 

  6. Petracci I, Manni L, Gori F (2016) Numerical simulation of the optimal spacing for a radial finned tube cooled by a rectangular jet. I e Average thermal results. Int J Therm Sci 104:54–67

    Article  Google Scholar 

  7. Koşar A, Mishra C, Peles Y (2005) Laminar flow across a bank of low aspect ratio micro pin fins. J Fluids Eng 127(3):419–430

    Article  Google Scholar 

  8. Güven A, Yücü H (2001) An experimental investigation on performance of fins on a horizontal base in free convection heat transfer. Heat Mass Transf 37:409–416

    Article  Google Scholar 

  9. Yalcin HG, Baskaya S, Sivirioglu M (2008) Numerical analysis of natural convection heat transfer from rectangular fin arrays on a horizontal surface. Int Commun Heat Mass Transf 35:299–311

    Article  Google Scholar 

  10. Yazicioglu B, Yüncü H (2007) Optimum fin spacing of rectangular fins on a vertical base in free convection heat transfer. Heat Mass Transf 44(1):11–21

    Article  Google Scholar 

  11. Arslanturk C (2005) Simple correlation equations for optimum design of annular fins with uniform thickness. Appl Therm Eng 25(14–15):2463–2468

    Article  Google Scholar 

  12. Ledezma G, Morega AM, Bejan A (1996) Optimal spacing between pin fins with impinging flow. J Heat Transf 118(3):570–577

    Article  Google Scholar 

  13. Babus’Haq RF, Akintunde K, Probert SD (1995) Thermal performance of a pin-fin assembly. Int J Heat Fluid Flow 16(1):50–55

    Article  Google Scholar 

  14. Yu X, Feng J, Feng Q, Wang Q (2005) Development of a plate-pin fin heat sink and its performance comparisons with a plate fin heat sink. Appl Therm Eng 25(2–3):173–182

    Article  Google Scholar 

  15. Kayansan N, Karabacak R (1992) Natural convection heat transfer coefficients for a horizontal cylinder with vertically attached circular fins. Heat Recovery Syst CHP 12(6):457–468

    Article  Google Scholar 

  16. Hahne E, Zhus D (1994) Natural convection heat transfer on fined tubes in air. Int J Heat Mass Transf 37:59–63

    Article  Google Scholar 

  17. Yildiz, Yüncü H (2004) An experimental investigation o performance of annular fins on a horizontal cylinder in free convection heat transfer. Heat Mass Transf 40:239–251

    Article  Google Scholar 

  18. Chen HT, Hsu WL (2007) Estimation of heat transfer coeficient on the fin of annular-fined tube heat exchangers in natural convection for varios fin spacings. Int J Heat Mass Transf 50:1750–1761

    Article  Google Scholar 

  19. Yaghoubi M, Mahdavi M (2013) An investigation of natural convection heat transfer from a horizontal cooled fined tube. Exp Heat Transf 26:343–359

    Article  Google Scholar 

  20. Kumar A, Joshi BJ, Nayak KA, Vjayan PK (2016) 3D CFD simulations of air cooled condenser-II: natural draft around a single finned tube in a small chimney. Int J Heat Mass Transf 92:50–55

    Google Scholar 

  21. Chen HT, Chang YL, Lin PY, Chiu YJ, Chang JR (2018) Numerical study of mixed convection heat transfer for vertical annular finned tube heat exchanger with experimental data and different tube diameters. Int J Heat Mass Transf 118:931–947

    Article  Google Scholar 

  22. Chen HT, Chiu YJ, Liu CS, Chang JR (2017) Numerical and experimental study of natural convection heat transfer characteristics for vertical annular finned tube heat exchanger. Int J Heat Mass Transf 109:378–392

    Article  Google Scholar 

  23. Chen HT, Chiu YJ, Tseng HC, Chang JR (2017) Effect of domain boundary set on natural convection heat transfer characteristics for vertical annular finned tube heat exchanger. Int J Heat Mass Transf 109:668–682

    Article  Google Scholar 

  24. Bejan A (2004) Convective heat transfer, 3rd edn. Wiley, New York

    MATH  Google Scholar 

  25. Bergman TL, Incropera FP, DeWitt DP, Lavine AS (2011) Fundamentals of heat and mass transfer, 7th edn. Wiley, New York

    Google Scholar 

  26. Dogan M, Sivrioglu M (2012) Experimental and numerical investigation of clearance gap effects on laminar mixed convection heat transfer from fin array in a horizontal channel-A conjugate analysis. Int J Heat Mass Transf 40:102–113

    Google Scholar 

  27. Senapati JR, Dash SK, Roy S (2016) Numerical investigation of natural convection heat transfer over annular finned horizontal cylinder. Int J Heat Mass Transf 96:330–345

    Article  Google Scholar 

  28. Roache PJ (1998) Verification and validation in computational science and engineering. Hermosa Publishers, New Mexico

    Google Scholar 

  29. Tsubouchi T, Masuda M (1970) Natural convection heat transfer from horizontal cylinders with circular fins. In: Proceedings of the international heat transfer conference. Paper NC 1.10, Paris

  30. Churchill SW, Chu HHS (1975) Correlating equations for laminar and turbulent free convection from horizontal cylinder. Int J Heat Mass Transf 18:1049–1053

    Article  Google Scholar 

  31. Morgan VT (1975) The overall convective heat transfer from smooth circular cylinder. Adv Heat Transf 11:199–264

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by CNPq, under contract 446281/2014-0.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Federal University of Rio Grande do Norte, Campus Universitário, Lagoa Nova, Natal, RN, 59072-970, Brazil

    Sandi Itamar Schafer de Souza, Kleiber Lima de Bessa & Andre Maurente

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  1. Sandi Itamar Schafer de Souza
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  2. Kleiber Lima de Bessa
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  3. Andre Maurente
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Correspondence to Andre Maurente.

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Technical Editor: Francis HR Franca, Ph.D.

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de Souza, S.I.S., de Bessa, K.L. & Maurente, A. Numerical investigation of convection in tubes with aluminium and carbon steel fins: evaluating the assumption of convective heat transfer coefficient as that for the tube without fins and relating physical processes with the optimum spacing between fins. J Braz. Soc. Mech. Sci. Eng. 41, 114 (2019). https://doi.org/10.1007/s40430-019-1609-y

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  • DOI: https://doi.org/10.1007/s40430-019-1609-y

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