Thermodynamics HW Solutions 32

Thermodynamics HW Solutions 32 - Analysis The heat transfer...

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Chapter 1 Basics of Heat Transfer 1-73 A person is standing in a room at a specified temperature. The rate of heat transfer between a person and the surrounding air by convection is to be determined. Assumptions 1 Steady operating conditions exist. 2 Heat transfer by radiation is not considered. 3 The environment is at a uniform temperature.
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Unformatted text preview: Analysis The heat transfer surface area of the person is T air Q conv Room air A s = π DL = π (0.3 m)(1.70 m) = 1.60 m² Under steady conditions, the rate of heat transfer by convection is W 336 = − ⋅ = Δ = C 20) )(34 m C)(1.60 W/m (15 2 2 o o & T hA Q s conv 1-32...
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