A stainless steel (AISI 304) tube is used to transport a cold liquid through a warm room. The tube has an inner diameter of 55mm and has a wall thickness of 3mm. In order to reduce heat loss the pipe is coated with 5mm thick layer of insulation (k= 0.1W/m-k). The liquid has a temprature of 3 C and the room has an ambient temprature of 40 . The inner convection Cofficient is determined to be 400 W/ m^2-K and free convection results in an outer convection Cofficient of 10W/m^2-K
a) Draw a thermal circuit to represent the problem
b) Determine the heat again per unit length of the pipe (W/m).