Qa: Tube and shell heat exchanger having 200 tubes arranged in two passes is used to cool 100.000 kg/h of methanol from 95 C to 45 9G. (duty 4340 kW) using cooling water with inlet temperature of 25 C and outlet temperature of 40 C. The tubes of the heat exchanger have an internal diameter of 14 cm, external diameter of 2 cm and length of 5 m. The mean heat capacity of water is 4 kl/kg.c, water density is 990 kg/m' and methanol density is 750 kg/m' The overall heat transfer coefficient is 3500 W/m and correction factor F,=0.9. (1) Find the required amount of water (mass flow rate)? [2 Marks) (2) Determine the total heat transfer area? [3 Marks] (3) Calculate the total number of tubes? [3 Marks) (4) Allocate the fluids in tube and shell sides? 12 Marks) 45) Check the velocity in the tube-side? is it reasonable? [3 Marks] (6) What is the mean heat capacity of methanol? [2 marks] d. In de di 1 U. 1 + he hed d d hid ST la (p. - d.). P: 1.10 -0.9174) pud Re Not do ky