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Unformatted text preview: relation in laminar flow for Nusselt number, heat transfer coefficient and the heat transfer rate are determined to be C . W/m 37 . 15 ) 5 . 140 ( m 25 . C W/m. 02735 . 5 . 140 ) 7228 . ( ) 617 , 55 ( 664 . Pr Re 664 . 2 3 / 1 5 . 3 / 1 5 . = = = = = = = Nu L k h k hL Nu L W 28.83 = C 35))(65 m C)(0.0625 . W/m 37 . 15 ( ) ( m 0.0625 = m) m)(0.25 25 . ( 2 2 2 = = = = s s conv s T T hA Q wL A & Considering that each transistor dissipates 3 W of power, the number of transistors that can be placed on this plate becomes 4 = = 8 . 4 W 6 W 8 . 28 n This result is conservative since the transistors will cause the flow to be turbulent, and the rate of heat transfer to be higher. 722...
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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, Power

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