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An Experimental Study on Laminar Heat Transfer in Flat Aluminum Extruded Tubes Having Small Hydraulic Diameter  

Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incheon)
Ham, Jung-Ho (Department of Mechanical Engineering, University of Incheon)
Kim, Do-Young (Department of Mechanical Engineering, University of Incheon)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.15, no.2, 2007 , pp. 47-53 More about this Journal
Abstract
Laminar heat transfer experiments were conducted in flat extruded aluminum tubes. Three different flat tubes-two with smooth inner channel, one with micro-finned inner channel-were tested. Smooth tube data were in reasonable agreement with the predictions by simplified theoretical models. The heat transfer coefficients of the micro-fin tube were significantly smaller than those of the smooth tube. The reason was attributed to the decelerating flow in the inter-fin region. Heat transfer correlations were developed from the data.
Keywords
Flat tube; Laminar flow; Heat transfer; Small diameter; Micro-fin;
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1 Wang, C. C., Webb, R. L., and Chi, K.Y., 1998, Data reduction for air-side performance of fin-and-tube heat exchangers, Exp. Thermal Fluid Science, Vol. 21, pp.218-226
2 Webb, R. L. and Jung, S. H., 1992, Air-side performance of enhanced brazed aluminum heat exchangers, ASHRAE Trans, BA-92-4-2, pp. 391-401
3 Shah, R. K. and London, A. L., 1978, Laminar flow forced convection in ducts, Advances in Heat Transfer, Supplement 1, edited by T. F. Irvine and J. P. Hartnett., Academic Press
4 Soliman, H. M., Chau, T. S., and Trupp, A. C., 1980, Analysis of laminar heat transfer in internally finned tubes with uniform outside wall temperature, Journal of Heat Transfer, Vol. 102, pp.598-604   DOI
5 Farrell, P., Wert, K., and Webb, R. L., 1991, Heat transfer and friction characteristics of turbulent radiator tubes, SAE Technical Paper Series, No.910197
6 Kline, S. J. and McClintock, F. A, 1953, The description of uncertainties in single sample experiments, Mechanical Engineering, Vol. 75, pp.3-9
7 Sieder, E. N. and Tate, G. E., 1936, Heat transfer and pressure drop of liquids in tubes, Ind. Eng. Chem., Vol. 28. pp.1429-1435   DOI