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12. Ts.2} 1, Ts,1}

12. Ts.2} 1, Ts,1}

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.2DP
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If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T,,1 = 800 K and T2 what is the rate of heat loss per unit length (d ) of the pipe, in W/m? = 490 K, respectively, q = i W/m
Transcribed Image Text:If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T,,1 = 800 K and T2 what is the rate of heat loss per unit length (d ) of the pipe, in W/m? = 490 K, respectively, q = i W/m
As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 12. Ts.2} 1, Ts,1} Steam Insulation 800 K and T,2 490 K, respectively, (a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T,1 what is the rate of heat loss per unit length (d ) of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (d'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T,1 = 800 K, inner radius rį = 0.06 m, and outer radius r2 = 0.16 m. The outer surface is exposed to an airflow (T, = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to large surroundings for which Tsur 25°C. The surface emissivity of calcium silicate is approximately 0.8.
Transcribed Image Text:As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. 12. Ts.2} 1, Ts,1} Steam Insulation 800 K and T,2 490 K, respectively, (a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T,1 what is the rate of heat loss per unit length (d ) of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (d'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T,1 = 800 K, inner radius rį = 0.06 m, and outer radius r2 = 0.16 m. The outer surface is exposed to an airflow (T, = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to large surroundings for which Tsur 25°C. The surface emissivity of calcium silicate is approximately 0.8.
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