A 10 cm OD steel pipe carrying steam at 4.905 x 105 Pa is lagged with 5 cm thick insulation. The surrounding air temperature is 27°C. The conductivity and emissivity of the insulating material are 0.14 W/mK and 0.92 respectively. If the heat transfer coefficient on the outer surface of lagged pipe is 11.63 W/m²K and neglecting the pipe resistance and internal boundary resistance. Calculate, (a) Heat loss per meter of the pipe by con- vection (b) Heat loss per meter of the pipe by ra- diation (c) Radiation and overall heat transfer co- efficients
A 10 cm OD steel pipe carrying steam at 4.905 x 105 Pa is lagged with 5 cm thick insulation. The surrounding air temperature is 27°C. The conductivity and emissivity of the insulating material are 0.14 W/mK and 0.92 respectively. If the heat transfer coefficient on the outer surface of lagged pipe is 11.63 W/m²K and neglecting the pipe resistance and internal boundary resistance. Calculate, (a) Heat loss per meter of the pipe by con- vection (b) Heat loss per meter of the pipe by ra- diation (c) Radiation and overall heat transfer co- efficients
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:A 10 cm OD steel pipe carrying steam at
4.905 x 105 Pa is lagged with 5 cm thick
insulation. The surrounding air temperature
is 27°C. The conductivity and emissivity of
the insulating material are 0.14 W/mK and
0.92 respectively. If the heat transfer
coefficient on the outer surface of lagged
pipe is 11.63 W/m?K and neglecting the pipe
resistance and internal boundary resistance.
Calculate,
(a) Heat loss per meter of the pipe by con-
vection
(b) Heat loss per meter of the pipe by ra-
diation
(c) Radiation and overall heat transfer co-
efficients
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