Question

What is the thickness required of a masonry wall having thermal conductivity 0.75 W/m K if the heat rate is to be 80% of the heat rate through a composite structural wall having a thermal conductivity of 0.25 W/m K and a thickness of 100 mm? Both walls are subjected to the same surface temperature difference.

Answer 1

the thickness required of a masonry wall L = 375mm

Step-by-step explanation:

The detailed steps and appropriate use of fourier's law of heat conduction is as shown in the attached file.