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Unformatted text preview: . 5 ( ) 7 . ( + C ) 30 ( C) . W/m 620 . 3 ( W 1512 ) ( ) ( 4 4 4 2 8 2 4 4 + + = + = + = s s surr s s s s rad conv T A T A T T A T T hA Q Q Q & & & I n steady operation, the heat lost by the side surfaces of the pipe must be equal to the heat lost from the exposed surface of the insulation by convection and radiation, which must be equal to the heat conducted through the insulation. Therefore, insul s s ins s s insulation t T A t T T kA Q Q C ) (110 C) W/m. 038 . ( W 1512 ) ( furnace = = = & & Solving the two equations above by trialand error (or better yet, an equation solver) gives T s = 48.4 C and t insul = 0.0254 m = 2.54 cm 937...
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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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