A 5-m long strip of sheet metal is being transported on a conveyor at a velocity of 5 m/s,...

A 5-m long strip of sheet metal is being transported on a conveyor at a velocity of 5 m/s, while the coating on the upper surface is being cured by infrared lamps. The coating on the upper surface of the metal strip has an absorptivity of 0.6 and an emissivity of 0.7, while the surrounding ambient air temperature is 25°C. Radiation heat transfer occurs only on the upper surface, while convection heat transfer occurs on both upper and lower surfaces of the sheet metal. If the infrared lamps supply a constant heat flux of 5000 W/m2, determine the surface temperature of the sheet metal. Evaluate the properties of air at 80°C.

FIGURE P19-16