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(a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T. - 800 K and T-490 K, respectively, what is the rate of heat loss per unit length() of the pipe, in W/m?

(a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T. - 800 K and T-490 K, respectively, what is the rate of heat loss per unit length() of the pipe, in W/m?

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 2.32P
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Heat transfer
(a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T = 800 K and T2-490 K, respectively, what is the rate of heat loss per unit length of the pipe, in W/m? (b) Determine the rate of heat loss per unit length(), in W/m, and outer surface temperature, in K, for the steam pipe with the inner surface temperature fixed at T = 800 K, inner radius, -0.06 m, and outer radius /2 = 0.12 m. The outer surface is exposed to an airflow (T-25°C) that maintains a convection coefficient of - 25 W/m2.K and to large surroundings for which T- T = T₂ = 25°C. The surface emissivity of calcium silicate is approximately 0.8. Part A If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T = 800 K and T2 - 490 K, respectively, what is the rate of heat loss per unit length () of the pipe, in W/m? = Save for Later W/m Attempts: 0 of 3 used Submit Answer
Transcribed Image Text:(a) If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T = 800 K and T2-490 K, respectively, what is the rate of heat loss per unit length of the pipe, in W/m? (b) Determine the rate of heat loss per unit length(), in W/m, and outer surface temperature, in K, for the steam pipe with the inner surface temperature fixed at T = 800 K, inner radius, -0.06 m, and outer radius /2 = 0.12 m. The outer surface is exposed to an airflow (T-25°C) that maintains a convection coefficient of - 25 W/m2.K and to large surroundings for which T- T = T₂ = 25°C. The surface emissivity of calcium silicate is approximately 0.8. Part A If the insulation is 25 mm thick and its inner and outer surfaces are maintained at T = 800 K and T2 - 490 K, respectively, what is the rate of heat loss per unit length () of the pipe, in W/m? = Save for Later W/m Attempts: 0 of 3 used Submit Answer
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