Question 4 A simple heat exchanger is made by installing a close return bend on two in Schedule 40 steel pipes as shown in Figure 5 below a. Calculate the energy loss in: i The close bend and ii The tube [8 marks) b. Calculate the pressure difference between the inlet and the outlet for a flow rate of 2.785 x 102 ft3/s of ethylene glycol at 770F (consider the minor losses in the tube and the close bend). [7 marks] The dynamic viscosity and density of ethylene glycol are 3.38 x 104 lb.s/ft2 and 2.13 slugs/ft? respectively. (Acceleration due to gravity g = 32.2 ft/s2) (Assume Point I at the inlet and Point 2 at the outlet are on the same level) -in Schedule 40 pipe se = 1.10 Flow 2 Inlet Outlet Close return bend 4.00 ft Figure 5