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(Solved): The overall heat transfer coefficient for a shell-and-tube heat exchanger with two shells and eight ...
The overall heat transfer coefficient for a shell-and-tube heat exchanger with two shells and eight tube passes is 1300 W/m²K. A hot liquid organic stream (Co=4.95 kJ/kgK) enters the heat exchanger at 340°C with a mass flow rate of 2 kg/s. Cooling water (C = 4.195 kJ/kgK) enters the exchanger at 20°C at a rate of 3 kg/s. If the total length of tubing within the heat exchanger is 60 m, find the required tube size of the standard tubes to cool the hot stream to 180°C at the outlet. Recommend the preferred fluid placement and the schedule of the exchanger tubes based on the Birmingham Wire Gage Scale.
Expert Answer
Overall heat transfer coefficient (U) = 1300 W/m2K Cp(hot stream) = 4.95 KJ/Kg K m = 2 Kg/s Ti= 340°C To = 180°C Cp(cold)= 4.195 KJ/Kg K Ti = 20