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//Variable declaration:
ki = 0.44 //Thermal conductivity of insulation (Btu/h.ft. F)
ho = 1.32 //Air flow coefficient (Btu/h.ft^2. F)
OD = 2 //Outside diameter of pipe (in)
//Calculation:
rc = (ki/ho)*12 //Outer critical radius of insulation (in)
ro = OD/2 //Outside radius of pipe (in)
L = rc-ro //Critical insulation thickness (in)
//Result:
printf("The outer critical radius of insulation is : %.0f in .",rc)
if ro<rc then
printf("Since, ro<rc, the heat loss will increase as insulation is added.")
else
printf("Sice, ro>rc, the heat loss will decrease as insulation is added.")
end
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