Question
Water is being pumped from reservoir A to an end nozzle C, where it will be discharged at atmospheric pressure as shown in Figure 2. A pump is used to reach the required velocity at the end nozzle. As shown in Figure 2, the length of suction pipe, Pipe 1, is 200 m with a dimeter of 200 mm. The delivery pipe, Pipe 2, is 850 m long with a diameter of 300 mm. The internal roughness of the pipe is k, = 0.03 mm. The local head losses at pipe entrance (from reservoir A) and pipe exit (at end nozzle C) can be calculated based on minor loss coefficients of 0.50 and 0.10, respectively. The kinematic viscosity is u = 1 x 10-6 m²/s and the water density is p = 1000 kg/m³. Calculate: a) The head produced by the pump (hpump) b) The pressure at p mp suction side and comment on its value in this specific system Water [6 marks] [4 marks] You can use any appropriate method to estimate the friction factors. Make sure you show clearly which method you have used in your calculations. Elev. 80 Elev. 70 Problem 2 Pipe 1 L₁= 200 m D₁= 200 mm (P) B Pipe 2 L₂ = 850 m D, = 300 mm [20 marks] Elev. 50 Figure 2: Pipe and fittings arrangement Vc= 10 m/s De = 70 mm
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