Unformatted text preview: . = = = ° = ° = = ππ o s o D A Nu D k h and W 3646 C ) 20 )( m 2 . 114 )( C . W/m 596 . 1 ( ) ( 2 2 = ° − ° = − = ∞ s s T T hA Q & Heat transfer by radiation and the total rate of heat transfer are kW 15.4 ≅ = + = = + − + × = − = − W 404 , 15 759 , 11 3646 W 759 , 11 ] ) K 273 ( ) K 273 20 )[( .K W/m 10 67 . 5 )( m 2 . 114 )( 1 ( ) ( 4 4 4 2 8 2 4 4 total surr s s rad Q T T A Q & & σε ( b ) The total amount of heat transfer during a 24hour period is kJ/day 10 331 . 1 ) s/h 3600 h/day 24 )( kJ/s 4 . 15 ( 6 × = × = Δ = t Q Q & Then the amount of ice that melts during this period becomes kg 3988 = × = = ⎯→ ⎯ = kJ/kg 7 . 333 kJ 10 331 . 1 6 if if h Q m mh Q 988...
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This note was uploaded on 01/24/2012 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

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