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//Variable declaration:
A = 1.0 //Surface area of glass (m^2)
h1 = 11.0 //Heat transfer coefficient inside room (W/m^2.K)
L2 = 0.125*0.0254 //Thickness of glass (m)
k2 = 1.4 //Thermal conductivity of glass (W/m.K)
h3 = 9.0 //Heat transfer coefficient from window to surrounding cold air (W/m^2.K)
//Calculation:
R1 = 1.0/(h1*A) //Internal convection resistance (K/W)
R2 = L2/(k2*A) //Conduction resistance through glass panel (K/W)
R3 = 1.0/(h3*A) //Outside convection resistance (K/W)
Rt = R1+R2+R3 //Total thermal resistance (K/W)
U = 1.0/(A*Rt) //Overall heat transfer coefficient (W/m^2.K)
//Result:
printf("The overall heat transfer coefficient is : %.1f W/m^2.K.",U)
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