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A. A hot pipe (k = 60 W/m K) in a house, made of Schedule 40 pipe (OD = 40 mm & ID = 35 mm), is 20 meters long and contains water at 80 C. Determine heat loss if the outer surface of the pipe is at 45 C. B. The pipe of problem A is insulated with 120 mm thick corkboard of 5 W/m K thermal conductivity. What is the required thickness of the insulation if it reduces the heat loss by 25 % and outer surface temperature is lowered to 30 C. QI insulation r3 hot water r2 ri Pipe

A. A hot pipe (k = 60 W/m K) in a house, made of Schedule 40 pipe (OD = 40 mm & ID = 35 mm), is 20 meters long and contains water at 80 C. Determine heat loss if the outer surface of the pipe is at 45 C. B. The pipe of problem A is insulated with 120 mm thick corkboard of 5 W/m K thermal conductivity. What is the required thickness of the insulation if it reduces the heat loss by 25 % and outer surface temperature is lowered to 30 C. QI insulation r3 hot water r2 ri Pipe

Elements Of Electromagnetics
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. A hot pipe (k = 60 W/m K) in a house, made of Schedule 40 pipe (OD = 40 mm & ID = 35 mm), is 20 meters long and contains water at 80 C. Determine heat loss if the outer surface of the pipe is at 45 C. B. The pipe of problem A is insulated with 120 mm thick corkboard of 5 W/m K thermal conductivity. What is the required thickness of the insulation if it reduces the heat loss by 25% and outer surface temperature is lowered to 30 C. QI insulation r3 hot water r2 ri pipe
Transcribed Image Text:A. A hot pipe (k = 60 W/m K) in a house, made of Schedule 40 pipe (OD = 40 mm & ID = 35 mm), is 20 meters long and contains water at 80 C. Determine heat loss if the outer surface of the pipe is at 45 C. B. The pipe of problem A is insulated with 120 mm thick corkboard of 5 W/m K thermal conductivity. What is the required thickness of the insulation if it reduces the heat loss by 25% and outer surface temperature is lowered to 30 C. QI insulation r3 hot water r2 ri pipe
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