QUESTION 1 [20 marks] 30,000 kg/h of kerosene leaves the base of a kerosene side-stripping column at 200C, and is to be cooled to 90C by exchange with 50,000 kg/h light crude oil coming from storage at 40C. The fouling factor on the crude stream is 0.00035 (W/m C)' and 0.0002 (W/m2 Cy! on the kerosene stream, the thermal conductivity of cupro-nickel alloys is 55 W/mC. Assume the overall heat transfer coefficient as 300 W/mC. Given the fluid properties at their mean temperature as: Properties Kerosene@ 145C Light crude oila 59C 2.47 2.05 0.132 0.134 Specific heat (kJ/kgC) Thermal conductivity(W/mC) Density (kg/m') Viscosity (mNs/m) 730 820 0.43 3.2 The following heat exchanger configuration is available: Split-ring floating head shell and tube exchanger: 1 shell pass and 2 tube passes Cupro-Nickel tubes of 19.05mm OD. 14.83mm ID, 5m long each, arranged in triangular pitch, pitch of 1.25 times OD. Take ballle spacing 1/5 shell diameter, and baffle cuts 25%, Design the shell and tube heat exchanger by determine; a) The heat transfer rate b) The outlet temperature of the crude oil. c) Heat transfer area d) Tube side heat transfer coefficient if the tube velocity is 2.3 m/s. c) Shell side heat transfer coefficient by kern's method f) The overall heat transfer coefficient and justify with the assumed value