ACTIVITY #3 - COMBINED CONDUCTION CONVECTION ON CYLINDRICAL WALL A hot-water pipe (k = 60 W/m K) in a house, made of 3/4-inch schedule 40 pipe (OD = 26.7 mm; thickness = 2.87 mm) is 15 meters long and contains water at 50 C. The air around the pipe is at 24 C. The heat transfer coefficient inside and outside the pipe are 1,135 W/m² K and 17 W/m² K, respectively. Insulation with thermal conductivity of 20 W/m K is to be added to the pipe. Determine the percent reduction of heat loss from the pipe due to insulation of 130 mm thick. air 24 C air Qo hot water Pipe hot water 50 C ri 12 BARE PIPE (w/o insulation) Q insulation ri PIPE with insulation
ACTIVITY #3 - COMBINED CONDUCTION CONVECTION ON CYLINDRICAL WALL A hot-water pipe (k = 60 W/m K) in a house, made of 3/4-inch schedule 40 pipe (OD = 26.7 mm; thickness = 2.87 mm) is 15 meters long and contains water at 50 C. The air around the pipe is at 24 C. The heat transfer coefficient inside and outside the pipe are 1,135 W/m² K and 17 W/m² K, respectively. Insulation with thermal conductivity of 20 W/m K is to be added to the pipe. Determine the percent reduction of heat loss from the pipe due to insulation of 130 mm thick. air 24 C air Qo hot water Pipe hot water 50 C ri 12 BARE PIPE (w/o insulation) Q insulation ri PIPE with insulation
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:ACTIVITY #3 - COMBINED CONDUCTION CONVECTION ON CYLINDRICAL WALL
A hot-water pipe (k = 60 W/m K) in a house, made of 3/4-inch schedule 40 pipe (OD =
26.7 mm; thickness = 2.87 mm) is 15 meters long and contains water at 50 C. The air
around the pipe is at 24 C. The heat transfer coefficient inside and outside the pipe
are 1,135 W/m² K and 17 W/m² K, respectively. Insulation with thermal conductivity of
20 W/m K is to be added to the pipe. Determine the percent reduction of heat loss
from the pipe due to insulation of 130 mm thick.
air
24 C
air
Qo
hot water
Pipe
r2
PIPE with insulation
hot
water
50 C
ri
12
BARE PIPE (w/o insulation)
Q
insulation
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