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A pipe with 8 cm internal diameter, 9 cm outer diameter, 2 meter long, thermal conductivity 30W/mK is insulated by glass wool material with which thermal conductivity 0,05W/mK, thickness 4 cm. Internal surface temperature of the pipe T₁ is 80°C, surrounding temperature where pipe is located is 20°C, convection heat transfer constant on outer surface of insulation is 25W/m2K. K30W/mK T. = 20°C h. = 25W/m²K 4cm -0,05W/mK a. Determine the heat loss from the pipe to surrounding (W)? b. What is temperature of the surface between glass wooden and pipe (T₂)? c. What is critical insulation radius for pipe? Is insulation on the pipe succesful? Explain

A pipe with 8 cm internal diameter, 9 cm outer diameter, 2 meter long, thermal conductivity 30W/mK is insulated by glass wool material with which thermal conductivity 0,05W/mK, thickness 4 cm. Internal surface temperature of the pipe T₁ is 80°C, surrounding temperature where pipe is located is 20°C, convection heat transfer constant on outer surface of insulation is 25W/m2K. K30W/mK T. = 20°C h. = 25W/m²K 4cm -0,05W/mK a. Determine the heat loss from the pipe to surrounding (W)? b. What is temperature of the surface between glass wooden and pipe (T₂)? c. What is critical insulation radius for pipe? Is insulation on the pipe succesful? Explain

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
Problem 1.1MA
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A pipe with 8 cm internal diameter, 9 cm outer diameter, 2 meter long, thermal conductivity 30Wimk is insulated by glass wool material with which themal conductivity 0,05W/mk, thickness 4 cm. Internal surface temperature of the pipe T, is 80 C, surrounding temperature where pipe is located is 20°C, convection heat transfer constant on outer surface of insulation is 25Wim2K. 30W/mk T.= 20"C h. - 25WimK 4cm 0,05Wimk a. Detemine the heat loss from the pipe to surrounding (Wy? b. What is temperature af the surface between glass wooden and pipe (T2)? e What is critical insulation radius for pipe? is insulation on the pipe succesful? Explain
Transcribed Image Text:A pipe with 8 cm internal diameter, 9 cm outer diameter, 2 meter long, thermal conductivity 30Wimk is insulated by glass wool material with which themal conductivity 0,05W/mk, thickness 4 cm. Internal surface temperature of the pipe T, is 80 C, surrounding temperature where pipe is located is 20°C, convection heat transfer constant on outer surface of insulation is 25Wim2K. 30W/mk T.= 20"C h. - 25WimK 4cm 0,05Wimk a. Detemine the heat loss from the pipe to surrounding (Wy? b. What is temperature af the surface between glass wooden and pipe (T2)? e What is critical insulation radius for pipe? is insulation on the pipe succesful? Explain
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