Thermodynamics HW Solutions 711

Thermodynamics HW Solutions 711 - temperature in this case...

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Chapter 9 Natural Convection C . W/m 1134 ) 986 . 8 ( m 005 . 0 C W/m. 631 . 0 2 ° = ° = = Nu D k h and C 42.5 ° = ° ° = = s 2 2 C ) 20 )( m 01571 . 0 )( C . W/m 1134 ( W 400 ) ( T T T T hA Q s s s which is sufficiently close to the assumed value of 40 ° C in the evaluation of the properties and h . The film
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Unformatted text preview: temperature in this case is ( T s + T )/2 = (42.5+20)/2 =31.3 C, which is close to the value of 40 C used in the evaluation of the properties. 9-12...
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