A 15-cm-diameter horizontal cylinder has a surface temperature that is maintained at 120°C. Water at 40°C is flowing across the cylinder with a velocity of 0.2 m/s. a) Calculate the heat transfer rate per unit length if the water is flowing (a) upward and (b) downward. b) Determine which direction (upward or downward water flow direction) has better heat transfer performance and how much percentage of increase of the heat transfer rate in the preferred direction.
A 15-cm-diameter horizontal cylinder has a surface temperature that is maintained at 120°C. Water at 40°C is flowing across the cylinder with a velocity of 0.2 m/s. a) Calculate the heat transfer rate per unit length if the water is flowing (a) upward and (b) downward. b) Determine which direction (upward or downward water flow direction) has better heat transfer performance and how much percentage of increase of the heat transfer rate in the preferred direction.
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 15-cm-diameter horizontal cylinder has a surface temperature that is maintained at 120°C. Water at 40°C is flowing across the cylinder with a velocity of 0.2 m/s.
a) Calculate the heat transfer rate per unit length if the water is flowing (a) upward and (b)
downward.
b) Determine which direction (upward or downward water flow direction) has better heat transfer performance and how much percentage of increase of the heat transfer rate in the preferred direction.
a) Calculate the heat transfer rate per unit length if the water is flowing (a) upward and (b)
downward.
b) Determine which direction (upward or downward water flow direction) has better heat transfer performance and how much percentage of increase of the heat transfer rate in the preferred direction.
Transcribed Image Text:↑↑↑↑
(a)
0:
(b)
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