Steam is condensing inside a pipe with a diameter 5 cm and negligible thickness. The surface of the pipe has a constant temperature of 200 C. The pipe is exposed to a surrounding temperature of 20 C where the convective heat transfer coefficient on this surface is 3.0 W m C-. To reduce heat loss, the chemical engineer is considering insulating the pipe with either asbestos (thermal conductivity 0.17 W.m1C or fibre glass (0.04 W.m*.C-) a) Calculate the heat loss per unit length from the pipe without any insulation. b) If the chemical engineer could only use 3cm thickness of insulation around the pipe, which insulation would you recommend? Support your recommendation with calculations. 3) A thermocouple is used to measure the temperature of hot air flowing in a duct whose walls are maintained at Tw. The thermocouple shows a reading of Tr. Assuming the emissivity of the thermocouple is & and the convective heat transfer coefficient is h, show that the actual temperature of the air (TA) is higher than the thermocouple reading. Comment on the assumptions made and how to get a more accurate thermocouple reading of the hot air.