40-m pipe has a nominal diameter of 40 mm and 5 mm thickness. Pipe is insulated with a 0.6 cm layer of asbestos, followed by a layer of cork 4 mm thick. Inside the pipe is steam having a temperature of 700°C with film coefficient of 6000 W/m²-K. If the ambient temperature of the air is 30°C and the film coefficient is 12 W/m²-K, calculate the minimum temperature of asbestos (°C). The thermal conductivity of steam pipe, asbestos and cork are 0.045 kW/m-K, 0.058 W/m-K and 0.043 W/m-K respectively.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Please answer the given questions and show the solutions. Thank you very much! Note: Please include the units in the solutions and use 4 decimals point in Final Answer
40-m pipe has a nominal diameter of 40 mm and 5 mm thickness. Pipe is
insulated with a 0.6 cm layer of asbestos, followed by a layer of cork 4 mm thick.
Inside the pipe is steam having a temperature of 700°C with film coefficient of
6000 W/m²-K. If the ambient temperature of the air is 30°C and the film
coefficient is 12 W/m²-K, calculate the minimum temperature of asbestos (°C).
The thermal conductivity of steam pipe, asbestos and cork are 0.045 kW/m-K,
0.058 W/m-K and 0.043 W/m-K respectively.
Transcribed Image Text:40-m pipe has a nominal diameter of 40 mm and 5 mm thickness. Pipe is insulated with a 0.6 cm layer of asbestos, followed by a layer of cork 4 mm thick. Inside the pipe is steam having a temperature of 700°C with film coefficient of 6000 W/m²-K. If the ambient temperature of the air is 30°C and the film coefficient is 12 W/m²-K, calculate the minimum temperature of asbestos (°C). The thermal conductivity of steam pipe, asbestos and cork are 0.045 kW/m-K, 0.058 W/m-K and 0.043 W/m-K respectively.
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