Exam 2 Review CHEG 3302 Problem 1 A fluid is being pumped from the tank at the rate of 159gal/min to another reservoir which is at higher elevation as shown in the figure. The connecting line in the suction side between reservoir 1 and reservoir 2 is 2 in Schedule 40 pipe. The pump performance is as provided by the manufacturer as shown. The kinematic viscosity is 4.6 x 104 ft/s. Calculate the total head developed by the pump. a. b. Calculate the available NPSH for the system. 2 = 400 ft 20 ft Shamim, Nabila | PVAMU V-1 20 psig NPSH = 8 ft LC sp gr = .78 60 ft 100 psig T-1 Friction Factor 0.1 0.09 0.08 0.07 I 0.06 0.05 0.04 4-7 0.03 ... 0.02 Laminar Flow 64 Re Moody Diagram LILITE Transition Region . 0.015 0.25 Glass, Plastic Perspex 0.025 0.0025 0.0025 Material Concrete, coarse Concrete, new smooth Drawn tubing e (mm) Complete Turbulence Iron, cast 0.15 0.01 - - Sewers, old 3.0 1 ' JJLJJ Steel, mortar lined 0.1 Steel, rusted 0.5 Steel, structural or forged 0.025 Water mains, old 1.0 103 104 1 Friction Factor = 105 Reynolds Number, Re 1 .. -TIT4-TTT I 4-77 I I 0.05 0.04 0.03 0.02 0.015 0.01 0.005 0.002 0.001 510 2x10 10-4 5x10-5 10-5 510-6 10-6 Relative Pipe Roughness 20 2d V21 AP. Smooth Pipe 106 107 108 = pVd Nev/14/23 NCHE6 3302 1. P.-P++ (y ) 19 (Z= 2.) = Aws-he a) P P=100 100 psig = FL D Re = pev Z2-z = (60-20) Le Type + Ke + ke + Kea Tv P=20psig go P P = Sg X PH20 JV, f = Fund (Re, klo) 2gc V = MLP moody's chart K/D= M 6) NPSH = g [R-P. g f= - Zpa