A hot-water pipe (k = 0.75 W/m K) for house heating in winter season, made of 3/4-inch schedule 40 pipe (OD = 25.5 mm; thickness = 2.0 mm) contains water at 60 C. The convective heat transfer coefficient inside and outside the pipe are 950 W/m^2 K and 20 W/m^2 K, respectively. Insulation is added such that air around the pipe is at 20 C. The thermal conductivity of the insulation is 0.2 W/m K. Determine the heat loss per meter of pipe length from the pipe with insulation of 25 mm thick in W
A hot-water pipe (k = 0.75 W/m K) for house heating in winter season, made of 3/4-inch schedule 40 pipe (OD = 25.5 mm; thickness = 2.0 mm) contains water at 60 C. The convective heat transfer coefficient inside and outside the pipe are 950 W/m^2 K and 20 W/m^2 K, respectively. Insulation is added such that air around the pipe is at 20 C. The thermal conductivity of the insulation is 0.2 W/m K. Determine the heat loss per meter of pipe length from the pipe with insulation of 25 mm thick in W
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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A hot-water pipe (k = 0.75 W/m K) for house heating in winter season, made of 3/4-inch schedule 40 pipe (OD = 25.5 mm; thickness = 2.0 mm) contains water at 60 C. The convective heat transfer coefficient inside and outside the pipe are 950 W/m^2 K and 20 W/m^2 K, respectively. Insulation is added such that air around the pipe is at 20 C. The thermal conductivity of the insulation is 0.2 W/m K. Determine the heat loss per meter of pipe length from the pipe with insulation of 25 mm thick in W.
Transcribed Image Text:T3 = 20 C
air
Q
insulation
B
fc
r3
A
T1 = 60 C fh
hot water
r2
r1
pipe
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