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clc
clear
printf("example 5.4 page number 173\n\n")
//to find the heat loss from composite wall
//for the red brick layer
x1=0.250; //in m
k1=0.7; //in W/mK
A1=1; //in m2
R1=x1/(k1*A1); //in K/W
//for the felt layer
x2=0.020; //in m
k2=0.046; //in W/mK
A2=1; //in m2
R2=x2/(k2*A2); //in K/W
R=R1+R2;
printf("Total resistance = %f K/W",R)
T1=110; //in K
T2=25 //in K
delta_T=T1-T2;
Q=delta_T/R;
printf("\n\nheat loss through wall = %f W/square m",Q)
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