1) Hot water at an average temperature of 60°C is flowing through a 10-m section of a cast iron pipe (k = 50 W/m K) whose the inner diameter and thickness are 30 mm and 2.5 mm, respectively. the pipe is covered with a 3.0-cm-thick layer of an insulation (k = 0.20 W/m K). The surrounding air is at 10°C. The inside and outside heat transfer coefficients are 100 and 15 W/m2 K, respectivel, Required: Draw the thermal resistance network (thermal circuit) and label the associated resistances and determine the following: a) the individual thermal resistances associated with the thermal circuit. b) the total thermal resistance value. c) the rate of heat transfer d) the temperature difference across the pipe shell

1) Hot water at an average temperature of 60°C is flowing through a 10-m section of a cast iron pipe (k = 50 W/m K) whose the inner diameter and thickness are 30 mm and 2.5 mm, respectively. the pipe is covered with a 3.0-cm-thick layer of an insulation (k = 0.20 W/m K). The surrounding air is at 10°C. The inside and outside heat transfer coefficients are 100 and 15 W/m2 K, respectivel, Required: Draw the thermal resistance network (thermal circuit) and label the associated resistances and determine the following: a) the individual thermal resistances associated with the thermal circuit. b) the total thermal resistance value. c) the rate of heat transfer d) the temperature difference across the pipe shell

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.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.24P

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