A hot liquid (cp = 1000 J/kg∙K) flows at a flow rate of 0.05 kg/s inside a copper pipe with an inner diameter of 45 mm and a wall thickness of 5 mm. At the pipe exit, the liquid temperature decreases by 10°C from its temperature at the inlet. The outer surface of the 5-m-long copper pipe is black oxidized, which subjects the outer surface to radiation heat transfer. The air temperature surrounding the pipe is 10°C. Assuming that the properties of air can be evaluated at 35°C and 1 atm pressure, determine the outer surface temperature of the pipe. Is 35°C an appropriate film temperature for evaluation of the air properties?
A hot liquid (cp = 1000 J/kg∙K) flows at a flow rate of 0.05 kg/s inside a copper pipe with an inner diameter of 45 mm and a wall thickness of 5 mm. At the pipe exit, the liquid temperature decreases by 10°C from its temperature at the inlet. The outer surface of the 5-m-long copper pipe is black oxidized, which subjects the outer surface to radiation heat transfer. The air temperature surrounding the pipe is 10°C. Assuming that the properties of air can be evaluated at 35°C and 1 atm pressure, determine the outer surface temperature of the pipe. Is 35°C an appropriate film temperature for evaluation of the air properties?
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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Question
A hot liquid (cp = 1000 J/kg∙K) flows at a flow rate
of 0.05 kg/s inside a copper pipe with an inner diameter of
45 mm and a wall thickness of 5 mm. At the pipe exit, the
liquid temperature decreases by 10°C from its temperature
at the inlet. The outer surface of the 5-m-long copper pipe
is black oxidized, which subjects the outer surface to radiation
heat transfer. The air temperature surrounding the pipe
is 10°C. Assuming that the properties of air can be evaluated
at 35°C and 1 atm pressure, determine the outer surface temperature
of the pipe. Is 35°C an appropriate film temperature
for evaluation of the air properties?
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