Thermodynamics HW Solutions 964

Thermodynamics HW Solutions 964 - convection coefficient is...

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Chapter 12 Radiation Heat Transfer 12-80 The convection heat transfer coefficient for a clothed person while walking in still air at a velocity of 0.5 to 2 m/s is given by h = 8.6 V 0.53 where V is in m/s and h is in W/m 2 . ° C. The convection coefficients in that range vary from 5.96 W/m 2 . ° C at 0.5 m/s to 12.4 W/m 2 . ° C at 2 m/s. Therefore, at low velocities, the radiation and convection heat transfer coefficients are comparable in magnitude. But at high velocities, the
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Unformatted text preview: convection coefficient is much larger than the radiation heat transfer coefficient. 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 V h Velocity, m/s h = 8.6 V 0.53 W/m 2 . ° C 0.50 0.75 1.00 1.25 1.50 1.75 2.00 5.96 7.38 8.60 9.68 10.66 11.57 12.40 12-61...
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This note was uploaded on 01/24/2012 for the course PHY 4803 taught by Professor Dr.danielarenas during the Fall '10 term at UNF.

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