Thermodynamics HW Solutions 777

Thermodynamics HW Solutions 777 - Chapter 9 Natural...

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Chapter 9 Natural Convection Then the total heat loss from the duct can be expressed as && & & [( ) ( ) ( ) ]( ) Q Q Q Q hA hA hA T T total top bottom side top bottom side s =+ + = + + Substituting and solving for the surface temperature, F ) 80 ]( F Btu/h. ) 4 009 . 1 2 5983 . 0 2 197 . 1 [( W 1 Btu/h 3.41214 W 180 ° ° × + × + × =
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