The pump whose characteristic curves are shown in Figure 11.5.136 is used to pump water from resenve:to reservoir B through 1000 ft of 8.00-in diameter pipe whose friction factor is 0.017 (as shor AFigure 11.5.14). Use the entrance loss coefficient of Ke= 0.5 and gate valve loss of KGv=0.2. (a) Whflow rate does it pump? (b) What input power is required to drive the pump?EXAMPLE 11.5.2Elev. 50.0'Gate valveоpenElev. 30.0'Elev. 20.0'PumpGate valveоpenElev. 0.0'1000 ftAFigure 11.5.14 Example 11.5.2 pipe system. Single-stage pumpImpeller diameter = 12.0 inOperated at N = 1800 RPM120-System curveexample 12.5.2НеadSystem curveexample 12.5.1100100Q = 4.4 cfsH = 98 ftE = 83%8080Q = 5.7 cfsH = 82.3 ftE = 74%6060Efficiency4040124Discharge Q (ft/sec)(b)Figure 11.5.13 (a) Figure for example 11.5.1. (b) Characteristic curves for examples 11.5.1 and 11.5.2.Efficiency (%)20CO20Head (ft)

(a) Flow rate from the pump (Q): From the given characteristic curves of the pump and pipe flow…

The pump whose characteristic curves are shown in Figure 11.5.13bis used to pump water from reservoir A to reservoir B through 1000 ft of 8.00-in diameter pipe whose friction factor is 0.017 (as shoue Figure 11.5.14). Use the entrance loss coefficient of K. = 0.5 and gate valve loss of KGy=0.2. (o) win flow rate does it pump? (b) What input power is required to drive the pump?

The pump whose characteristic curves are shown in Figure 11.5.13bis used to pump water from reservoir A to reservoir B through 1000 ft of 8.00-in diameter pipe whose friction factor is 0.017 (as shoue Figure 11.5.14). Use the entrance loss coefficient of K. = 0.5 and gate valve loss of KGy=0.2. (o) win flow rate does it pump? (b) What input power is required to drive the pump?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Hydrodynamics pumps (WRITTEN COMPLETE SOLUTION AND FIGURES IF NEEDED) 1. A centrifugal pump installation draws water from an open reservoir having a water elevation of 5 m above the pump centerline and delivers the water to another open reservoir 80 m above pump centerline. The rate of discharge is 600 li/min. The suction pipe has a diameter of 200 mm while that of the discharge pipe diameter is 150 mm. The friction loss at the suction is estimated to be 4 times the velocity head at the 200 mm suction pipe. At the discharge, the friction loss is estimated to be 21 times the velocity head at the 150 mm discharge pipe. If the overall mechanical efficiency is 77%, estimate the brake power input to thepump. a. brake power Answer : ____________________ kW
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3) A centrifugal pump delivers water between two reservoirs with a 300 ft. elevation difference (Az). The 12-in diameter suction pipe (f1= 0.020) is 100 ft. long (L1) and the 10-in diameter discharge pipe (f2= 0.026) is 5000 ft. long (L2). The pump has a performance curve defined by the equation: h, = 375 - Q² where h, is the pump head in feet and Q is the discharge in ft/s. a) Calculate the discharge, Q. b) Calculate the NPSHA. Assume standard atmospheric conditions, 60°F water, and a pump elevation 8 ft. above the lower reservoir Az D, L2 2 D, Ly. ft LOM
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Water is pumped from a supply reservoir to a ductile- iron water-transmission line, as shown in Figure 2.26. The high point of the transmission line is at point A, 1 km downstream of the supply reservoir, and the low point of the transmission line is at point B, 1 km downstream of A. If the flow rate through the pipeline is 1 m3/s, the diameter of the pipe is 750 mm, and the pressure at A is to be 350 kPa, then: (a) estimate the head that must be added by the pump; (b) estimate the power supplied by the pump; and (c) calculate the water pressure at B. Supply reservoir Elev. 7 m Pump Elev. 10 m Transmission line Elev. 4 m- B Figure 2.26: Water pumped into a transmission line
شمذنس Fluid mechanics
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Question 1: For the setup shown in the figure: H = 20 m f = 0.0012 f = 0.0012 D = 250 mm D = 80 mm L = 50 m L = 50 m f = 0.001 D₁ = 150 mm L = 100 m A. Calculate Q in the 150 mm-diameter pipe B. If the NPSHR of the pump is 3 m. Is it feasible to use the pump? You can use: Patm-101 kN/m², and Pvapor = 3.17 kN/m² H₂ = 10 m Pump Q f = 0.0012 D=80 mm L = 50 m Q₁ = 0.2
A pump draws 24L/s of water from reservoir A and lifts it to reservoir B. The head lost from A to 1 is 3 times the velocity head in the 150mm suction line and the head lost from 2 to B is 25 times the velocity head in the 100mm discharge line. (A) What is the power delivered by the pump to the system in hp? (B) What is the pressure head in meters in point 1? (C) What is the pressure head in meters in point 2?