In a textile unit, hot fluid flows through a long steel pipe (k=15 W/m°C) with inner and outer diameters of 70 mm and 75 mm, respectively. The convection coefficient between the hot fluid and the inner surface of the pipe is 100 W/m²K, the convection coefficient between the outer surface of the pipe and the ambient air is 10 W/m²K, and the emissivity (emission) coefficient of the pipe is 0,75. Under steady regime conditions; Since the pipe outer surface temperature is 80°C, the outside air and ambient temperature is 20°C, a) The total amount of heat lost to the environment per unit length of the pipe, b) Calculate the hot fluid temperature and the pipe inner surface temperature.
In a textile unit, hot fluid flows through a long steel pipe (k=15 W/m°C) with inner and outer diameters of 70 mm and 75 mm, respectively. The convection coefficient between the hot fluid and the inner surface of the pipe is 100 W/m²K, the convection coefficient between the outer surface of the pipe and the ambient air is 10 W/m²K, and the emissivity (emission) coefficient of the pipe is 0,75. Under steady regime conditions; Since the pipe outer surface temperature is 80°C, the outside air and ambient temperature is 20°C, a) The total amount of heat lost to the environment per unit length of the pipe, b) Calculate the hot fluid temperature and the pipe inner surface temperature.
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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In a textile unit, hot fluid flows through a long steel pipe (k=15 W/m°C) with inner and outer diameters of 70 mm and 75 mm, respectively. The convection coefficient between the hot fluid and the inner surface of the pipe is 100 W/m²K, the convection coefficient between the outer surface of the pipe and the ambient air is 10 W/m²K, and the emissivity (emission) coefficient of the pipe is 0,75. Under steady regime conditions; Since the pipe outer surface temperature is 80°C, the outside air and ambient temperature is 20°C,
a) The total amount of heat lost to the environment per unit length of the pipe,
b) Calculate the hot fluid temperature and the pipe inner surface temperature.
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