Thermal Engineering and Desalination Technology Program Sections: CA, DA & FA CLO 11 A paint baking oven consists of a long, triangular duct in which the heated surface is maintained at 1300 K and another surface is insulated. Painted panels, which are maintained at 600 K, occupy the third surface. The triangle is of width W 1.1 m on a side. and the heated and insulated surfaces have an emissivity of 0.85. The emissivity of the panels is 0.45 During steady-state operation, at what rate must energy be supplied to the heated side per unit length of the duct to maintain its temperature at 1300 K? What is the temperature of the insulated surface?