Question

The 10 ft long steam pipe in the back of our classroom has an inner diameter of ¾” and an outer diameter of 1.25”.  Assume that the pipe is made of cast Iron (look up material properties). Steam flows rapidly through the pipe and has a temperature of 175oC.  The layer of pipe insulation is 2” thick. The conductivity of the insulation is 0.05 W/mK.  The outer surface temperature of the pipe insulation is 30oC.  Calculate the rate of heat loss from the pipe?

Answer 1

Thermal conductivity of cast iron is taken from a ref from internet (ref temp 53 deg celcius). You can use your own reference. Approach will remain same.