THERMAL SCIENCE

International Scientific Journal

Pooranachandran Karthik

,

Vellaisamy Kumaresan

,

Ramalingam Velraj

FANNING FRICTION (F) AND COLBURN (J) FACTORS OF A LOUVERED FIN AND FLAT TUBE COMPACT HEAT EXCHANGER

ABSTRACT
In the present study, the heat transfer and pressure drop characteristics of air over the louvered fins in a compact heat exchanger, used as a radiator in the automobiles have been experimentally investigated. The experiments were conducted at various flow rates of air and the results showed a decrease in goodness factor of 22.7% with respect to increase in Reynolds number from 231 to 495. The experimental results were compared with the CFD results and the ‘f’ and ‘j’ factors from the CFD analysis are in good agreement with the experimental data. Also, the experimental ‘f’ and ‘j’ factors were compared with the predicted values from the available correlations in the literature for the louvered fin and tube compact heat exchangers. The large deviation of the predicted results revealed that the correlations are not reliable for the design of the compact heat exchanger. Hence, the CFD analysis is more advantageous for the optimal design of compact heat exchanger, which also reduces the experimentation time and cost.
KEYWORDS
louvered fin, pressure drop, Goodness factor, Compact heat exchangers, CFD
PAPER SUBMITTED: 2013-11-18
PAPER REVISED: 2015-06-04
PAPER ACCEPTED: 2015-06-11
PUBLISHED ONLINE: 2015-07-03
DOI REFERENCE: https://doi.org/10.2298/TSCI131118088K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 1, PAGES [141 - 150]
REFERENCES
  1. Kays W.M. and London A.L. Compact heat exchangers, Reprint 3rd ed., FL: Krieger; 1998.
  2. V.P. Malapure, S.K. Mitra, A. Bhattacharya, Numerical investigation of fluid flow and heat transfer over louvered fins in compact heat exchanger, International Journal of Thermal Sciences 46 (2007) 199-211.
  3. M. Faizal, M.R. Ahmed, Experimental studies on a corrugated plate heat exchanger for small temperature difference applications, Experimental Thermal and Fluid Science 36 (2012) 242-248.
  4. K. Krishnakumar, A. K. John, G. Venkatarathnam, A review on transient test techniques for obtaining heat transfer design data of compact heat exchanger surfaces, Experimental Thermal and Fluid Science 35 (2011) 738-743.
  5. F.N. Beauvais, An Aerodynamic Look at Automotive Radiators. SAE, 1965, Paper No. 650470.
  6. A. Achaichia and T. A. Cowell, Heat transfer and pressure drop characteristics of flat tube and louvered fin surfaces, Experimental Thermal and Fluid science, 1 (1988) 147-157.
  7. C.- C. Wang, C.- J. Lee, C.- T. Chang, S. P. Lin, Heat transfer and friction correlation for compact louvered fin and tube heat exchangers, International Journal of Heat and Mass Transfer, 42 (1999) 1945-1956.
  8. M-H. Kim and C.W. Bullard, Air-side thermal hydraulic performance of multi-louvered fin aluminum heat exchangers, International Journal of Refrigeration 25 (2002) 390-400.
  9. C.J. Davenport, Correlation for heat transfer and friction characteristics of louvered fin, AICHE Symposium Series 79 (1983) 19-27.
  10. J. Dong, J. Chen, Z. Chen, W. Zhang, Y. Zhou, Heat transfer and pressure drop correlations for the multi-louvered fin compact heat exchangers, Energy Conversion and Management 48 (2007) 1506- 1515.
  11. Y.J. Chang and C.C. Wang, A generalized heat transfer coefficient for louver fin geometry, International Journal of Heat and Mass Transfer, 40 (1997), 533-544.
  12. Y.J. Chang, K.C. Hsu, Y.T. Lin, C.C. Wang, A generalized friction correlation for louver fin geometry, International Journal of Heat and Mass Transfer 43 (2000) 2237-2243.
  13. W. Li, X. Wang, Heat transfer and pressure drop correlations for compact heat exchangers with multi-region louver fins, International Journal of Heat and Mass Transfer 53 (2010) 2955-2962.
  14. B. Sunden and J. Svantesson, Correlation of j and f factors for multi-louvered heat transfer surfaces, Proceedings of the 3rd UK National Heat Transfer Conference (1992) 805-811.
  15. A. Vaisi, M. Esmaeilpour, H. Taherian, Experimental investigation of geometry effects on the performance of a compact louvered heat exchanger, Applied Thermal Engineering 31 (2011) 3337- 3346.
  16. M. Khaled, F. Harambat, H. Peerhossaini, Analytical and empirical determination of thermal performance of louvered heat exchanger -Effects of air flow statistics, International Journal of Heat and Mass Transfer 54 (2011) 356-365.
  17. Hui Han, Ya-Ling He, Yin-Shi Li, Yu Wang and Ming Wu, " A numerical study on compact enhanced fin-and-tube heat exchangers with oval and circular tube configurations", International Journal of Heat and Mass Transfer 65 (2013) 686-695.
  18. José Fernández-Seara, Rubén Diz, Francisco J. Uhía, "Pressure drop and heat transfer characteristics of a titanium brazed plate-fin heat exchanger with offset strip fins", Applied Thermal Engineering 51 (2013) 502-511.
  19. Hao Peng and Xiang Ling, "Predicting thermal-hydraulic performances in compact heat exchangers by support vector regression", International Journal of Heat and Mass Transfer 84 (2015) 203-213.
  20. P. Karthik, L.A. Sheik Ismail, N. Kulasekharan, R. Velraj, "Experimental and numerical investigation of a louvered fin and elliptical tube compact heat exchanger", Thermal Science, doi:10.2298/TSCI120220146P.
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Fanning friction (f) and colburn (j) factors of a louvered fin and flat tube compact heat exchanger

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