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. Kpe=30W/mK T. = 20,°C h. = 25W/m²K 4cm K = 0,05W/mK T
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. Kpe=30W/mK T. = 20,°C h. = 25W/m²K 4cm K = 0,05W/mK T
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Chapter3: Transient Heat Conduction
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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/m?K.
K 30WimK
T. 20°C
h. = 25W/MK
4cm
0,05W/mK
a. Detemine 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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1bfbbdd5-7866-457b-b4ea-99ca352a6726%2Fa269acd9-a590-4cfc-a02f-40a0b50a863f%2Fm3654ce_processed.jpeg&w=3840&q=75)
Transcribed Image Text: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/m?K.
K 30WimK
T. 20°C
h. = 25W/MK
4cm
0,05W/mK
a. Detemine 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
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