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 pipe is 35 mm asbestos (k = 0.15 W/m-°C) and is covered with 25 mm thick magnesia insulation (k = 0.075 W/m-°C). The heat transfer coefficients for the outside and inside surfaces are 220 W/m?.°C and 6.5 W/m?C respectively. Temperature of the steam is 350°C and the outside atmosphere is at 30°C. (a) Sketch the schematic diagram of the system in question showing all necessary details and given data. (b) Determine the steady loss of heat for 50 m length of pipe. (c) Find out the overall heat transfer coefficients based on inside and outside surfaces of the lagged steam pipe.
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 pipe is 35 mm asbestos (k = 0.15 W/m-°C) and is covered with 25 mm thick magnesia insulation (k = 0.075 W/m-°C). The heat transfer coefficients for the outside and inside surfaces are 220 W/m?.°C and 6.5 W/m?C respectively. Temperature of the steam is 350°C and the outside atmosphere is at 30°C. (a) Sketch the schematic diagram of the system in question showing all necessary details and given data. (b) Determine the steady loss of heat for 50 m length of pipe. (c) Find out the overall heat transfer coefficients based on inside and outside surfaces of the lagged steam pipe.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Question:
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 pipe is 35 mm asbestos (k = 0.15
W/m-°C) and is covered with 25 mm thick magnesia insulation (k = 0.075 W/m-°C). The heat
transfer coefficients for the outside and inside surfaces are 220 W/m?.°C and 6.5 W/m?.°C
respectively. Temperature of the steam is 350°C and the outside atmosphere is at 30°C.
(a) Sketch the schematic diagram of the system in question showing all necessary details and
given data.
(b) Determine the steady loss of heat for 50 m length of pipe.
(c) Find out the overall heat transfer coefficients based on inside and outside surfaces of the
lagged steam pipe.
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