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An Experimental Study of Air Flow and Heat Transfer Over In-Line Flat Tube Bank

Tahseen, Tahseen Ahmad and M. M., Rahman and M., Ishak (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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An experimental study was made to investigate heat transfer and air flow around the flat tubes of in-line flat tube banks with laminar forced convection. Measurements were conducted for sixteen tubes in the flow direction; four rows of four tubes, three air velocities (0.6, 0.8 and 1.0 m/s) and Reynolds numbers ReDh = 527, 703 and 880, where Dh is the hydraulic diameter of the tube. The total heat flux supplied in all the tubes was 968, 2259 and 3630 W/m2, respectively. The study results indicate that the average Nusselt number of all the flat tubes increased by 23.7%-36.7% with Reynolds numbers varying from 527 to 880 with fixed heat flux; also the average Nusselt number increased by 11.78%-23.75% at varying heat fluxes of 968, 2259 and 3630 W/m2, respectively at Reynolds number Re = 703. In addition, the pressure drop decreased with the increase of Reynolds number. The Nusselt number-Reynolds number correlation was found to be and the correlation yielded good predictions of the measured data with the mean error R2 = 99.2%.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Professor Dr. Md. Mustafizur Rahman
Date Deposited: 12 Jan 2015 02:09
Last Modified: 30 Jan 2018 02:39
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