EXAMPLE 13.3 = In manufacturing, the special coating on a curved solar absorber surface of area A₂ 15 m² is cured by exposing it to an infrared heater of width W = 1 m. The absorber and heater are each of length L = 10 m and are separated by a distance of H = 1 m. The upper surface of the absorber and the lower surface of the heater are insulated. H Absorber surface, A2, T2, E2 Heater, A₁, T₁, 1 Room walls, Isur W- The heater is at T₁ == 1000 K and has an emissivity of 81 = = 0.9, while the absorber is 0.5. The system is in a large room whose at T₂ = 600 K and has an emissivity of 82 walls are at 300 K. What is the net rate of heat transfer to the absorber surface?