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An experimental study of air flow and heat transfer over in-line flat tube bank

Tahseen, Tahseen Ahmad and M., Ishak and M. M., Rahman (2014) An experimental study of air flow and heat transfer over in-line flat tube bank. International Journal of Automotive and Mechanical Engineering (IJAME), 9. pp. 1487-1500. ISSN 1985-9325(Print); 2180-1606 (Online)

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Abstract

An experimental study has been made to investigate heat transfer and air flow around flat tube of in-line flat tube banks with laminar forced convection. Measurements were conducted for sixteen tubes in the flow direction;four tubes in the rows, the three air velocity (0.6, 0.8 and 1.0 ms-1) and Reynolds number are ReDh = 527, 703 and 880,where Dh isthe hydraulic diameter of the tube. The total heat flux supplies in all tubes are 967.92, 2258.48 and 3629.70 Wm-2, respectively. The study results indicate that the average Nusselt number of all flat tubes has increased 23.7%-36.7% with Reynolds numbers varying from 527 to 880 at the fixed heat flux; also averageNusselt number has increased11.78% - 23.75% at the heat flux are varying 967.92, 2258.48 and 3629.70 Wm-2, respectively at the Reynolds number Re = 703. In addition, the pressure drop decreaseswith the increase of Reynolds number. The Nusselt number-Reynolds number correlation was found to be 2 1 C Nu  C Re , the correlation yielded good predictions of the measured data with the mean error R2 = 0.992.

Item Type: Article
Additional Information: Indexed in Scopus
Uncontrolled Keywords: Experimental study; Forced convection; In-line flat tube; Measurement
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: mala
Date Deposited: 03 Mar 2014 03:23
Last Modified: 30 Jan 2018 02:38
URI: http://umpir.ump.edu.my/id/eprint/3914
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