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As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 2. Ts 2} 11. Ts. 1} Steam Insulation (a) If the insulation is 22.5 mm thick and its inner and outer surfaces are maintained at 7 = 800 K and 7 = 490 K respectively, what is the rate of heat loss per unit length (4) of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (4), in W/m, and outer surface temperature 7s,2, in K, for the steam pipe with the inner surface temperature fixed at T = 800 K, inner radius r = 0.06 m, and outer radius >> = 0.14 m. The outer surface is exposed to an airflow (T. = 25°C) that maintains a convection coefficient of h = 25 W/m2K and to large surroundings for which Tsus = T = 25°C. The surface emissivity of calcium silicate is approximately 0.8. Part A If the insulation is 22.5 mm thick and its inner and outer surfaces are maintained at T3,1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (d) of the pipe, in W/m? d = i W/m Save for Later Attempts: 0 of 3 used 3 Submit Answer