I have gotten this far, but I am not sure how to read the graph to find effieciency. Please see attached. Efficiency, %908060189 L/s (3000 gal/min)630 L/s (10,000 gal/min)> 630 L/s63 L/s (1000 gal/min)31.5 L/s (500 gal/min)7026012.5 L/s (200 gal/min)6.3 L/s (100 gal/min)5040405001,000102,0005,000Specific speed, ns (U.S. customary units)50Type number, ns (SI units)10,000100200300Radial flowMixed flowImpeller shapePropeller(axial flow)Figure 12.2.5 Pump efficiency as related to specific speed and discharge (from Tchobanoglous (1998)). 12.2.2 A flow of 0.03 m³/s must be pumped against a head of 30 m.The pump will be driven by an electric motor with a speed of 1800rev/min. What type of pump should be used and what is thecorresponding efficiency?иS1800√0.03=Q24.33/4H(304

Radial Flow pump is used and its efficiency is 75%Explanation:Given Discharge Q= 0.03 m3/s convert…

Answered: Efficiency, % 90 80 60 189 L/s (3000…

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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Calculate the required pump power since the velocity of the water in the pipe is v=1.91 m/s pwater=1000kh/m^3 μ=1.307x10^-3
A reservoir A with elevation 30m connected with a pump to rise the water into two reservoirs B and C 90m and 60 m respectively the amount of flow from J to B is equal 0.11 m/sec use the following data to determine the flow in each pipe and the power of the pump: LAJ 450 m, DaJ = 300 mm, LJB= 300 m, DJB = 200 m, Q JB = 0. m'/sec, LJc 600, D Jc = 150 mm,f (all Pipes) 0.02
Q.6 a) Apply Hazen William's Equation to the pumped system shown in the following figure, having a pumping head of 77 mwc. Determine diameter of the pipe to deliver a flow of Q-4000 m 3 /hr maintaining pressure of 50 mwc at the entrance of the city through a pipe of L =1200m having Hazen William's roughness coefficient C=120. Also calculate increase in the flow when the pressure at the entrance of the city drop to 40 mwc.
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
Point A in the suction pipe is 1 m below the pump. It is mounted with anopen manometer which reads a vacuum of 20 cm of mercury. The pipe is10 cm in diameter and the flow is 35 liters/s of water. Compute the totalenergy at point A with respect to a datum through the pump.
Problem 7: The two pumps in problem 6 are now arranged in parallel. The static head is 40 ft. The pipe diameter is 9-in of 1200 ft length and the minor loss coefficient is 20. Determine the operating condition and power output (Q, head, and efficiency) and the power output for the system of two pumps. Use f= 0.022. What is the flow rate and efficiency of each pump?
6. A centrifugal pump discharging 900 gpm and operates at 1800 rpm against a head of 120 feet has a power output of 30 hp. If the pump is to operate at 1200 rpm assuming efficiency remains constant. Determine the new discharge in gpm, the head and power.
The pump draws water at 30 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is three times the velocity head in the 150mm diameter pipe and the head loss from 2 to B is twenty times the velocity head in the 100mm diameter pipe. Which of the following most nearly gives the powet delivered by the pump? Choices: 59.38 kW 75.14 kW 44.82 kW 53.96 kW
Example4 A centrifugal pump is used to raise the water from the river to the reservoir, find: 1) total dynamic head. 2) water power, pump power and motor power. 3) monthly cost pump operation, if power cost is 4 cents and pump operates 20 hr/day. If:- 1. Q= 1.9 m/min 2. Elevation between the reservoir and the pump is 25 m and the length of the pipe is 365 m 3- Diameter of suction lift and discharge pipes 200 mm and length of suction lift is 10 m. 4- Barometric pressure is 88 Kpa, vapor pressure 2.5 Kpa 5- NPSH). = 40 Kpa 6- Efficiency of pump and motor is 80%. 7. Neglect minor losses 8- Use f = 0.02, Y= 10 Kn/m
PROBLEM 3 An 85-percent-efficlent pump is used to Increase the pressure of water In a 10-cm-diameter plpe from 12o to 800 kPa. (a) What is the head (m) added by the pump? (b) What is the required horsepower of the pump for a flow rate of 0.0o15 m/s, (c) What is the required horsepower of the pump for a flow rate of 20 L/s. P, = 120 kPa P: = 800 kPa 10-ст
9:46 M回 O NI l l 96%l IMG 20220311_093841.jpg From a reservoir A whose surface elevation is 225 m, water is pumped through 1200 m. of 300 mmø pipes across a valley to a second reservoir B whose level is at elev. 240 m. During pumping, the pressure is 550 kPa at a point on the pipe midway of its length at C and at elevation 195 m. f a pump is installed near the outlet of the reservoir A and assuming f= 0.02. EL 240 El. 225 600 mm 300 mme 300mm 600m EL 195 O Compute the discharge flowing in the pipeline. Compute the head added due to the presence of the pump. O Compute the horsepower exerted by the pump.
Consider the figure below. The pump supplies water from reservoir A to reservoir B through the 500mm o pipe, 600m long. Using f = 0.02 and the hydraulic grade line shown, determine the following: a) power supplied by the pump, b) power loss by the turbine, and elevation maintained by reservoir B. El. 200 hfj El. 190 НЕ El. 180 hf, B El.100 A P TURBINE PUMP ANSWER: a. Power = 1557.828 kW, b. Power = 155.7828 kW c. Elevation of B = 170 m %3D

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