5.15 The flow and head requirements for a particular application are 20 cfs and 100 ft., respectively. Two identical pumps with a rated speed of 1750 rpm are an option. What would be the specific speed and the impeller diameters if the pumps are (a) connected in series and (b) if they are connected in parallel.

5.15 The flow and head requirements for a particular application are 20 cfs and 100 ft., respectively. Two identical pumps with a rated speed of 1750 rpm are an option. What would be the specific speed and the impeller diameters if the pumps are (a) connected in series and (b) if they are connected in parallel.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: The plunger diameter of a single-acting reciprocating pump is 115 mm and the stroke is 230 mm. The…

Q: A manufacturer tested one of its pump models at 2133.5 rpm and derived the characteristics as shown…

Q: Propose a centrifugal pump (brand and model) to transport 10 L/s of a fluid with a density of 1500…

A: The discharge of the pump given at starting is- The head given is .The density of the fluid is .

Q: An axial flow turbine operates with a constant axial velocity throughout of 230. The rotation speed…

A: Given Data: V=230 m/sN=3600 rpmr=1.2 mθ=35o To Find: (a) Velocity triangle at the inlet and exit.

Q: Shown in the Figure is the complete pump performance chart for a 3×4-10 centrifugal pump at 1750…

A: Given Total head, H = 50 ft = 15.24 m Speed, N = 1750 rpm Flow rate, Q = 200 gal/min =…

Q: In a test of the centrifugal pump shown in Fig. below, the following data are taken: py =100 mmHg…

A: The velocity of the fluid at inlet by using the continuity equation The velocity of the fluid at…

Q: determine the rotation rate for the smaller , homologus pump . Using ONLY AFFINITY LAWS

A: To calculate the rotation rate of the smaller pumpgiven flow rategiven head of the pumpspeed of the…

Q: O lit/sec water enters a centr ally at 5 m/s and leaves at a - axial direction. If the inlet

Q: A 2-stage centrifugal pump delivers 50 gpm of 225oF water against 200 ft head at 3200 rpm. a) What…

Q: Solve fast with Proper Equation. 1. A centrifugal pump delivers 2.5 cfs of water against a head of…

Q: At mid-radius an axial turbine stage is designed for 50% reaction, zero outlet swirl, and an axial…

A: (a) There is no swirl in the absolute velocity leaving the rotor, . Therefore the following relation…

Concept explainers

Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Question

5.15 The flow and head requirements for a particular application are 20 cfs and 100 ft.,
respectively. Two identical pumps with a rated speed of 1750 rpm are an option.
What would be the specific speed and the impeller diameters if the pumps are (a)
connected in series and (b) if they are connected in parallel.
Ans: (a) N,=3.22 (b) N,=3.22, D=1.22 ft.
%3D

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Please solve question four
7. Use the pump map attached, Suppose I want to pump water at 120 gpm against a head of 10 m. a. What size impeller should I use... note it is between two .. do I want the larger or the smaller and why. b. With this impeller, you can read the hp required and the pump efficiency.. report them. c. What input head is required (NPSH)? d. If I use the largest impeller at 120 gpm it should be clear I will generate extra "head" or pressure. What could I do to handle this extra head .. ie to not deliver too much pressure to my system?
For Questions 3 to 5 A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q^2), in feet BP = (0.0521Q^3) + (1.250^2)+(11.042Q) + 134.5, in horsepower where Q is in ft^3/s. Question 3 If a single pump is used to deliver water of a system which requires a total of 8 ft^3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft^3. Round your answer to 2 decimal places.
For a 6.25-inch Model 4075 pump operated at 1160 rpm, if 450 GPM of water is to be delivered, what will be the estimated pump head in ft? HEAD IN FEET 30 25 0 0 0 10 O 6 ft 7.25" (184mm) 20 7.00" (178mm). 6.75" (171mm). 6.50" (165mm)] 15 6.25" (159mm). 5 O 16 ft O 20 ft O 12 ft aco® L/SEC 5 OT 10 Model 4075 FI & CI Series 15 -6-6 ⁰ dº 20 ANA 888 778 25 REQUIRED NPSH do 1160 RPM November 1, 2010 K ・dº- [M 90 do 30 8800 81 1HP(.75KW) DeJ kin do 60% 35 do 50 Curve no. 2175 Min. Imp. Dia. 6.25" Size 5 x 4 x 7.0 40 45 3HP(2.2KW), 2HP(1 5KW) 5HP(1 1KW)> CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 L 75 150 225 300 375 450 525 600 675 FLOW IN GALLONS PER MINUTE NOWONG FEET 15 12 7 6 2 1 NPSH 758 50 5 HEAD IN METERS 45 586888 KPO 60 40 20 10 LO HEAD IN KILOPASCALS
The system curve for a water supply system is shown in the figure below (i.e., red curve). If a 7-inch pump is operating at 1160 rpm, what will be the discharge of water through the system in GPM? Curve no. 2175 Min. Imp. Dia. 6.25" Size 5 x 4 x 7.0 40 HEAD IN FEET 30 25 W 20 10 5 L/SEC 5 7.00" (178mm) 6.75" (171mm) 6.50" (165mm) 15 6.25" (159mm) 7.25" (184mm) O 150 GPM Laco O 350 GPM O 450 GPM O 250 GPM 10 Model 4075 FI & CI Series 15 70% 20 "Dede de 088 A. 25 REQUIRED NPSH 90 1160 RPM November 1, 2010 TM 90- N 00 30 8800 877 1HP(.75KW) de (5 60% ox 35 -10% 5% Tolo 10. 3HP(2.2KW) 2HP(1 5KW). 15HP(1 1KW). CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 75 150 225 300 375 450 525 600 675 FLOW IN GALLONS PER MINUTE 45 LOWONG FEET 15 12 9 6 0 6 5 + 2 1 750 NPSH HEAD IN METERS 45 36 OG KPO 27 18 -9 -70 -60 -50 -40 20 10 -0 HEAD IN KILOPASCALS
1. If the pump rotated at 2000 rpm and instead and used a 9" impeller, what would the head be when moving 400 gallons per minute? 2. How much input power would be required to move 200 gpm of gasoline in the pump described in the chart with an impeller diameter of 8 3/4"?
Displacement (c): 0.2 in3/revShank diameter (d) = 0.625 in.Piston diameter (D) = 1.5 in.Rotation speed (n): 1725 RPMPressure (P): 600 PSIStroke (L) = 18in. a) Calculate the theoretical flow rate of the pump in in3/min and US GPM.Theoretical flow (Q) = Theoretical displacement (C) x Speed of revolution (n)Theoretical flow (Q) = 0.2 in3/rev x 1725 rpmTheoretical flow (Q) = 345 in3/min = 1.49 US GPM b) Calculate the cylinder output speed in in/s.Cylinder output speed (VS) = Piston side flow (Q) / Piston area (Ap)Cylinder output speed (VS) = (Displacement x Speed of revolution) / Piston area (Ap)Cylinder output speed (VS) = (0.2 in3/rev x 1725 RPM) / 1.77 in2Cylinder output speed (VS) = (0.2 in3/rev x 1725 RPM) / 1.77 in2Cylinder output speed (VS) = 196.02in/s = 196.02 / 60s = 3.20 in/s Questions: c) Knowing the output velocity (ram speed), calculate the rod side flow in GPM when the ram is extending. d) Calculate the piston exit time in seconds. e) Calculate the piston entry time in…
Find the offset angle for an axial pump that delivers 50 gpm at 1750 rpm. The volumetric efficiency is 95%. The pump has a nine 0.75 inch diameter pistons arranged on a 6-in piston circle diameter.
The answer is one of the options below please solve carefully and circle the correct option Please write clear .