problem4-17 - PROBLEM 4.17 KNOWN Cubical furnace 350 mm...

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PROBLEM 4.17 K NOWN: Cubical furnace, 350 mm external dimensions, with 50 mm thick walls. F IND: The heat loss, q(W). SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) Two-dimensional conduction, (3) onstant properties. C PROPERTIES: Table A-3 , Fireclay brick ( ) ( ) 1 2 T T T / 2 610K : k 1.1 W/m K. = + = A NALYSIS: Using relations for the shape factor from Table 4.1, Plane Walls (6) 2 W A 0.25 0.25m S 1.25m L 0.05m × = = = Edges (12)
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