As shown in the sketh below, a steam pipe of 0.12-m inside diameter is insulated with a layer of calcium silicate. '2. Ta 2} 1. Ts,1} Steam Insulation (a) If the insulation is 12.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (g') of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T1 = 800 K, inner radius r = 0.06 m, and outer radius r2 = 0.14 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 Tur = T. = 25°C. The surface emissivity of calcium silicate is approximately 0.8. Part A If the insulation is 12.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (q') of the pipe, in W/m? d = 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. '2. Ta 2} 1. Ts,1} Steam Insulation (a) If the insulation is 12.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (g') of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T,2, in K, for the steam pipe with the inner surface temperature fixed at T1 = 800 K, inner radius r = 0.06 m, and outer radius r2 = 0.14 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 Tur = T. = 25°C. The surface emissivity of calcium silicate is approximately 0.8. Part A If the insulation is 12.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and T,2 = 490 K, respectively, what is the rate of heat loss per unit length (q') of the pipe, in W/m? d = W/m

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.70P: The thermal conductivity of fibreglass insulation at 67F is 0.02 Btu/h ft F. What is its value in SI...

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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. 12. Ts.2} 1. Ts,1} Steam Insulation (a) If the insulation is 17.5 mm thick and its inner and outer surfaces are maintained at T,1 = 800 K and Ts,2 = 490 K, respectively, what is the rate of heat loss per unit length (q') of the pipe, in W/m? (b) Determine the rate of heat loss per unit length (q'), in W/m, and outer surface temperature T.2, in K, for the steam pipe with the inner surface temperature fixed at Ts,1 The outer surface is exposed to an airflow (T = 800 K, inner radius ri = 0.06 m, and outer radius r2 = 25°C) that maintains a convection coefficient of h = 25 W/m2-K and to = 0.1 m. large surroundings for which Tsur = T_ = 25°C. The surface emissivity of calcium silicate is approximately 0.8.
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