A wall has an overall U value of 0.25 W/m^2K. It includes a layer of insulation 50 mm thick. The conductivity of the insulation is 0.035 W/mK. It is decided that the thickness of the insulation should be increased so that the U value is reduced to 0.20 W/m^2K. What is the new thickness of insulation required?
A wall has an overall U value of 0.25 W/m^2K. It includes a layer of insulation 50 mm thick. The conductivity of the insulation is 0.035 W/mK. It is decided that the thickness of the insulation should be increased so that the U value is reduced to 0.20 W/m^2K. What is the new thickness of insulation required?
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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Question
A wall has an overall U value of 0.25 W/m^2K. It includes a layer of
insulation 50 mm thick. The conductivity of the insulation is 0.035 W/mK.
It is decided that the thickness of the insulation should be increased so
that the U value is reduced to 0.20 W/m^2K. What is the new thickness of
insulation required?
answer = 85mm
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