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A 18-m-long section of a 14-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 27°C. If the temperature and the emissivity of the outer surface of the pipe are 73°C and 0.8, respectively. Determine the rate of heat loss from the pipe by natural convection.

A 18-m-long section of a 14-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 27°C. If the temperature and the emissivity of the outer surface of the pipe are 73°C and 0.8, respectively. Determine the rate of heat loss from the pipe by natural convection.

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
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A 18-m-long section of a 14-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 27°C. If the temperature and the emissivity of the outer surface of the pipe are 73°C and 0.8, respectively. Determine the rate of heat loss from the pipe by natural convection. The properties of air at 1 atm and the film temperature of (Ts+ Too)/2 = (73+27)/2 = 50°C are k = 0.02735 W/m. °C v = 1.798 x 10-5 m²/s Pr = 0.7228 B= 1/Tf= 0.003096 K-1
Transcribed Image Text:A 18-m-long section of a 14-cm-diameter horizontal hot water pipe passes through a large room whose temperature is 27°C. If the temperature and the emissivity of the outer surface of the pipe are 73°C and 0.8, respectively. Determine the rate of heat loss from the pipe by natural convection. The properties of air at 1 atm and the film temperature of (Ts+ Too)/2 = (73+27)/2 = 50°C are k = 0.02735 W/m. °C v = 1.798 x 10-5 m²/s Pr = 0.7228 B= 1/Tf= 0.003096 K-1
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