A two-layer 24 m² plane wall consists of a 250 mm thick inner concrete layer with thermal conductivity k, of 2 W/m K and a 80 mm thick outer insulation with k of 0.04 W/m K. The temperatures of wall inner and outer surfaces are t, = 28°C and tą = -9°C. Calculate (i) the rate of heat transfer and (ii) the temperature t, of the wall intermediate surface.
A two-layer 24 m² plane wall consists of a 250 mm thick inner concrete layer with thermal conductivity k, of 2 W/m K and a 80 mm thick outer insulation with k of 0.04 W/m K. The temperatures of wall inner and outer surfaces are t, = 28°C and tą = -9°C. Calculate (i) the rate of heat transfer and (ii) the temperature t, of the wall intermediate surface.
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 two-layer 24 m² plane wall consists of a 250 mm thick inner concrete
layer with thermal conductivity k, of 2 W/m K and a 80 mm thick outer
insulation with k, of 0.04 W/m K. The temperatures of wall inner and outer
surfaces are t, = 28°C and t3 =-9°C. Calculate (i) the rate of heat transfer
and (ii) the temperature t, of the wall intermediate surface.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff890638a-70d3-4743-9b87-c104f6d4ea15%2Fd66c5e6b-15ff-4496-906d-26af5be47528%2F524z1w8_processed.png&w=3840&q=75)
Transcribed Image Text:A two-layer 24 m² plane wall consists of a 250 mm thick inner concrete
layer with thermal conductivity k, of 2 W/m K and a 80 mm thick outer
insulation with k, of 0.04 W/m K. The temperatures of wall inner and outer
surfaces are t, = 28°C and t3 =-9°C. Calculate (i) the rate of heat transfer
and (ii) the temperature t, of the wall intermediate surface.
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