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Ethylene glycol enters a steel pipe of length, L = 15 m with thermal conductivity (k) of 52 W/m. C at T1 = 80 C. The inner and outer diameters of the pipe are D = 4 cm and D. = 4.6 cm, respectively. The pipe is located in a room whose temperature is T-2 = 10 C. The convection heat transfer coefficients at the inner and outer surfaces of the pipe are h; = 150 W/m2.C and ho = 20 W/m2.C, respectively. The heat transfer occurs at a steady state condition. The emissivity and temperature of the outer surface of the pipe are =0.7 and 50 C, respectively. Calculate the rate of heat loss (Q) from the ethylene glycol by using thermal resistance network. a) Draw the schematic diagram of the steel pipe. (2 marks) b) Determine the total thermal resistance. (15 marks) c) Determine the total heat transfer rate (3 marks) d) Calculate the average velocity (V) of the ethylene glycol in the pipe if the temperature drop (AT) of the ethylene glycol is 6 C. Given the density and heat capacity of ethylene glycol are p = 1109 kg/m and Cp = 2840 J/kg-C, respectively