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Thermodynamics HW Solutions 33

Thermodynamics HW Solutions 33 - The convection heat...

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Chapter 1 Basics of Heat Transfer 1-74 Hot air is blown over a flat surface at a specified temperature. The rate of heat transfer from the air to the plate is to be determined. Assumptions 1 Steady operating conditions exist. 2 Heat transfer by radiation is not considered. 3
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Unformatted text preview: The convection heat transfer coefficient is constant and uniform over the surface. Analysis Under steady conditions, the rate of heat transfer by convection is W 22,000 = − × ⋅ = Δ = C 30) )(80 m 4 C)(2 W/m (55 2 2 o o & T hA Q s conv 80 ° C Air 30 ° C 1-33...
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