Compare the effect of forced convection on heat transfer from an incandescent lamp, Problem 5.27. What will the glass temperature be for air velocities of 0.5, 1, 2, and 4 m/s? From Problem 5.27: Only ten percent of the energy dissipated by the tungsten filament of an incandescent lamp is in the form of useful visible light. Consider a 100 W lamp with a 10 cm spherical glass bulb. Assuming an emissivity of 0.85 for the glass and ambient air temperature of 20?C, what is the temperature of the glass bulb?GIVENA spherical glass light bulb in airBulb power consumption (P) = 100W10% of energy is in the form of visible lightDiameter (D) = 10 cm = 0.1 mBulb emissivity (ε) = 0.85Ambient air temperature (T??) = 20?C = 293 KASSUMPTIONSThe bulb has reached steady stateThe surrounding behave as a black body atT??

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Alr Te = 20°C = 293 K Te-? Velodty = Uoo FD- 0.1 m