Unformatted text preview: ⋅ °C. ğ Analysis The shape factor for this configuration is given in Table 35 to be m 30 . 10 m 4 . 2 m 4 . 1 25 . 1 ) m 4 . 1 ( 2 25 . 1 2 = − π = − π = z D D S Then the steady rate of heat transfer from the tank becomes W 102 = ° − ° = − = C ) 18 )( C W/m. 55 . )( m 30 . 10 ( ) ( 2 1 T T Sk Q & T 1 =18 ° C T 2 = 0 ° C z = 2.4 m D = 1.4 m If the ground surface is insulated, m 68 . 7 m 4 . 2 m 4 . 1 25 . 1 ) m 4 . 1 ( 2 25 . 1 2 = + π = + π = z D D S W 76 = ° − ° = − = C ) 18 )( C W/m. 55 . )( m 68 . 7 ( ) ( 2 1 T T Sk Q & 3131...
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 Fall '10
 Dr.DanielArenas
 Thermodynamics, Mass, Heat, Heat Transfer, Thermal conductivity

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