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ess stream, with an inlet temperature of 110 C is to be cooled to 48 C. The process stream has a flowrate of 33 000

ess stream, with an inlet temperature of 110 C is to be cooled to 48 C. The process stream has a flowrate of 33 000 kg/h. Cooling water is available at 25 C for cooling purposes. The cooling water outlet temperature should not exceed 36 C. The physical properties of the process and cooling water stream are as follows: Process stream Cooling water Density (kgm3) 732 992 Heat capacity (Jkg1K1) 3320 4190 Viscosity (Nsm2) 3.7 10-4 8.0 10-4 Thermal conductivity (Wm1K1) 0.136 0.613 Fouling coefficient (W m-2 K1) 6 000 3 000 Allowable pressure drop (kPa) 60 60 Tubes (k = 45 Wm1K1) with an outside diameter (OD) = 19.05 mm, wall thickness of 2 mm and length = 4.88 m, are available. A triangular pitch of 1.25 OD has been selected. 1.1 Would you agree that the cooling water stream should be allocated to the tube-side of the exchanger? Justify your answer. (2) 1.2 Decide whether a 1 shell 2 tube pass heat exchanger will be suitable, and then calculate the heat transfer area required for the heat exchanger, based on an overall heat transfer coefficient of 650 W/m2K. (9) 1.3 Select the type of exchanger (i.e. fixed-tube, split-ring floating head, pull-through floating head) and calculate the shell bundle clearance and the shell diameter required for the given service. (8) 1.4 Calculate the tube-side heat transfer coefficient. (10) 1.5 Calculate the shell-side heat transfer coefficient using a baffle spacing 0.4 shell diameter. (11) 1.6 Determine the overall heat transfer coefficient and determine the percentage over-design or under-design. (5) 1.7 Calculate the pressure drop on both the tube side and shell side of the

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