Pr A steam pipe (k = 45 W/m°C) having 70 mm inside diameter and 85 mm outsidediameter is lagged with two insulation layers; the layer in contact with the pipe is 35 mmasbestos (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 220W/m²°C and 6.5 W/m2°C respectively. If the temperature of steam is 350°C and theambient 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 thelagged steam main.- Steam main (A)-Asbestos (B)- Magnesia (C)With best wishesSteamof=30°CAir

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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

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

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 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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