Steam passes through a steel pipe with an inner diameter of 60 mm and an outer diameter of 75 mm at 250 ° C. The heat transfer coefficients inside and outside the pipe are respectively 500 and 25 W / m2K. If the ambient temperature is 20°C and the heat transfer coefficient of the pipe is 56.5 W/mK A)Find the heat loss from the 5 m length of the pipe. B) What thickness of insulation should be made from the material with a heat transfer coefficient of 0.035 W / mK in order to reduce the heat loss by 95%.
Steam passes through a steel pipe with an inner diameter of 60 mm and an outer diameter of 75 mm at 250 ° C. The heat transfer coefficients inside and outside the pipe are respectively 500 and 25 W / m2K. If the ambient temperature is 20°C and the heat transfer coefficient of the pipe is 56.5 W/mK A)Find the heat loss from the 5 m length of the pipe. B) What thickness of insulation should be made from the material with a heat transfer coefficient of 0.035 W / mK in order to reduce the heat loss by 95%.
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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Steam passes through a steel pipe with an inner diameter of 60 mm and an outer diameter of 75 mm at 250 ° C. The heat transfer coefficients inside and outside the pipe are respectively 500 and 25 W / m2K. If the ambient temperature is 20°C and the heat transfer coefficient of the pipe is 56.5 W/mK
A)Find the heat loss from the 5 m length of the pipe.
B) What thickness of insulation should be made from the material with a heat transfer coefficient of 0.035 W / mK in order to reduce the heat loss by 95%.
Transcribed Image Text:T1=250°C
h = 500W/m°K
D.
T2 = 20°C
h, = 25 W/m°K
k = 56.5 W/mK
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