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Unformatted text preview: bottom of the pan are to be determined. Assumptions 1 Steady operating conditions exist. 2 Heat transfer is onedimensional since the thickness of the bottom of the pan is small relative to its diameter. 3 The thermal conductivity of the pan is constant. Properties The thermal conductivity of the aluminum pan is given to be k = 237 W/m ⋅ °C. Analysis ( a ) The boiling heat transfer coefficient is 95 ° C 108 ° C 600 W 0.5 cm 2 2 2 m 0491 . 4 m) 25 . ( 4 = = = π D A s C . W/m 1254 2 ° = ° − = − = − = ∞ ∞ C ) 95 108 )( m 0491 . ( W 800 ) ( ) ( 2 T T A Q h T T hA Q s s s s & & ( b ) The outer surface temperature of the bottom of the pan is C 108.3 ° = ° ° = + = − = ) m C)(0.0491 W/m. 237 ( m) 005 . W)( 800 ( + C 108 2 1 , , , , kA L Q T T L T T kA Q inner s outer s inner s outer s & & 39...
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This note was uploaded on 01/14/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.
 Fall '10
 Dr.DanielArenas
 Thermodynamics, Convection, Mass, Heat, Radiation

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