A fluid at 75C flows within a 60.33mm OD schedule 40 steel pipe (k=47W/m.K) (Refer to Table 1). If the temperature of the ambient air outside the pipe is 28C and the inner and outer convection coefficients are 475W/m2.K and 20W/m2.K, respectively, (a) Draw a thermal circuit depicting the situation described. [3 marks] (b) Calculate the heat gain per meter if the pipe is covered with a 10mm-thick layer of insulation (k=0.07W/m.K). Draw a thermal circuit representing this case. Table 1: Dimensions of standard steel pipe