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A steam pipe (k = 45 having 70 mm inside diameter and 85 mm outside diameter is lagged with two insulation layers; the layer in contact with the pipe is 35 mm asbestos (k = 0.15 W/m°C) and it is covered with 25 mm thick magnesia insulation (k = 0.075 W/m°C). The heat transfer coefficients for the inside and outside surfaces are 220 W/m2°C and 6.5 W/m2°C respectively. If the temperature of steam is 350°C and the ambient temperature is 30°C, calculate: a) The steady loss of heat for 50 m length of the pipe; b) The overall heat transfer coefficients based on inside and outside surfaces of the lagged steam main. -Steam main (A) Asbestos (RY

A steam pipe (k = 45 having 70 mm inside diameter and 85 mm outside diameter is lagged with two insulation layers; the layer in contact with the pipe is 35 mm asbestos (k = 0.15 W/m°C) and it is covered with 25 mm thick magnesia insulation (k = 0.075 W/m°C). The heat transfer coefficients for the inside and outside surfaces are 220 W/m2°C and 6.5 W/m2°C respectively. If the temperature of steam is 350°C and the ambient temperature is 30°C, calculate: a) The steady loss of heat for 50 m length of the pipe; b) The overall heat transfer coefficients based on inside and outside surfaces of the lagged steam main. -Steam main (A) Asbestos (RY

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A steam pipe (k = 45 W/m°C) having 70 mm inside diameter and 85 mm outside diameter is lagged with two insulation layers; the layer in contact with the pipe is 35 mm asbestos (k = 0.15 W/m°C) and it is covered with 25 mm thick magnesia insulation (k = 0.075 W/m°C). The heat transfer coefficients for the inside and outside surfaces are 220 W/m²°C and 6.5 W/m2°C respectively. If the temperature of steam is 350°C and the ambient temperature is 30°C, calculate: a) The steady loss of heat for 50 m length of the pipe; b) The overall heat transfer coefficients based on inside and outside surfaces of the lagged steam main. - Steam main (A) -Asbestos (B) - Magnesia (C) With best wishes Steam of=30°C Air
Transcribed Image Text:A steam pipe (k = 45 W/m°C) having 70 mm inside diameter and 85 mm outside diameter is lagged with two insulation layers; the layer in contact with the pipe is 35 mm asbestos (k = 0.15 W/m°C) and it is covered with 25 mm thick magnesia insulation (k = 0.075 W/m°C). The heat transfer coefficients for the inside and outside surfaces are 220 W/m²°C and 6.5 W/m2°C respectively. If the temperature of steam is 350°C and the ambient temperature is 30°C, calculate: a) The steady loss of heat for 50 m length of the pipe; b) The overall heat transfer coefficients based on inside and outside surfaces of the lagged steam main. - Steam main (A) -Asbestos (B) - Magnesia (C) With best wishes Steam of=30°C Air
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