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Unformatted text preview: kW 9.08 = = = = = = W 9081 C 5))(12 m C)(40 . W/m 43 . 32 ( ) ( m 40 = m) m)(10 4 ( 2 2 2 s s s T T hA Q wL A & If the wind velocity is doubled : 7 2 5 10 163 . 2 /s m 10 413 . 1 m) m/s](10 ) 3600 / 1000 110 [( Re = = = L L V which is greater than the critical Reynolds number. Thus we have combined laminar and turbulent flow. Using the proper relation for Nusselt number, the average heat transfer coefficient and the heat transfer rate are determined to be C . W/m 88 . 57 ) 10 384 . 2 ( m 10 C W/m. 02428 . 10 384 . 2 ) 7340 . ]( 871 ) 10 163 . 2 ( 037 . [ Pr ) 871 Re 037 . ( 2 4 4 3 / 1 8 . 7 3 / 1 8 . = = = = = = = Nu L k h k hL Nu L kW 16.21 = = = = = = W 206 , 16 C 5))(12 m C)(40 . W/m 88 . 57 ( ) ( m 40 = m) m)(4 10 ( 2 2 2 s s s T T hA Q wL A & 74...
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This note was uploaded on 01/22/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Convection, Force, Mass, Heat

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