8. Hot water at an average temperature of 80°C and an average velocity of 1.5 m/s is flowing through a 25-m section of a pipe that has an outer diameter of 5 cm. The pipe extends 2 m in the ambient air above the ground, dips into the ground (k = 1.5 W/m °C) vertically for 3 m, and continues horizontally at this depth for 20 m more before it enters the next building. The first section of the pipe is exposed to the ambient air at 8°C, with a heat transfer coefficient of 22 W/m2 · °C. If the surface of the ground is covered with snow at 0°C, determine (a) the total rate of heat loss from the hot water and (b) the temperature drop of the hot water as it flows through this 25-m-long section of the pipe. Hot water pipe 8°C 0°C 3 m 80°C. 20 m:
8. Hot water at an average temperature of 80°C and an average velocity of 1.5 m/s is flowing through a 25-m section of a pipe that has an outer diameter of 5 cm. The pipe extends 2 m in the ambient air above the ground, dips into the ground (k = 1.5 W/m °C) vertically for 3 m, and continues horizontally at this depth for 20 m more before it enters the next building. The first section of the pipe is exposed to the ambient air at 8°C, with a heat transfer coefficient of 22 W/m2 · °C. If the surface of the ground is covered with snow at 0°C, determine (a) the total rate of heat loss from the hot water and (b) the temperature drop of the hot water as it flows through this 25-m-long section of the pipe. Hot water pipe 8°C 0°C 3 m 80°C. 20 m:
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:8. Hot water at an average temperature of 80°C and an average velocity of 1.5 m/s is flowing
through a 25-m section of a pipe that has an outer diameter of 5 cm. The pipe extends
2 m in the ambient air above the ground, dips into the ground (k = 1.5 W/m · °C) vertically
for 3 m, and continues horizontally at this depth for 20 m more before it enters the next
building. The first section of the pipe is exposed to the ambient air at 8°C, with a heat transfer
coefficient of 22 W/m2 · °C. If the surface of the ground is covered with snow at 0°C,
determine (a) the total rate of heat loss from the hot water and (b) the temperature drop of the
hot water as it flows through this 25-m-long section of the pipe.
Hot water pipe
8°C
0°C
3 m
80°C.
20 m:
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