Fox and McDonald's Introduction to Fluid Mechanics
9th Edition
ISBN: 9781118912652
Author: Philip J. Pritchard, John W. Mitchell
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 10, Problem 46P
A centrifugal pump operating at N = 2265 rpm lifts water between two reservoirs connected by 300 ft of 6-in.-diameter and 100 ft of 3-in.-diameter cast-iron pipe in series. The gravity lift is 25 ft. Estimate the head requirement, power needed, and hourly cost of electrical energy to pump water at 200 gpm to the higher reservoir. Assume that electricity costs 12¢/kW · hr and that the electric motor efficiency is 85 percent.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A centrifugal pump delivers 3000,000 liters per hour of water to a pressurized thank whose pressure is 280 kPa. The source of water is 5 meters below the pump. The diameter of the suction pipe is 300 mm and the discharge pipe is 250 mm. calculate the KW rating of the driving motor assuming the pump efficiency to be 72%. (answer is 13.16 KW) with drawing.
Water at 20°C is being pumped from tank 1 to tank 2 with given conditions. Calculate thepower of pump used in the system. (Both tanks are open to atmosphere)
Please answer
Chapter 10 Solutions
Fox and McDonald's Introduction to Fluid Mechanics
Ch. 10 - The geometry of a centrifugal water pump is r1 =...Ch. 10 - Find the resulting -groups when (a) D, , and Q or...Ch. 10 - Consider the centrifugal pump impeller dimensions...Ch. 10 - Dimensions of a centrifugal pump impeller areCh. 10 - Dimensions of a centrifugal pump impeller areCh. 10 - The blade is one of a series. Calculate the force...Ch. 10 - This blade is one of a series. What force is...Ch. 10 - A centrifugal water pump, with 15-cm-diameter...Ch. 10 - A centrifugal water pump designed to operate at...Ch. 10 - A series of blades, such as in Example 10.13,...
Ch. 10 - In passing through this blade system, the absolute...Ch. 10 - A centrifugal pump runs at 1750 rpm while pumping...Ch. 10 - A centrifugal water pump designed to operate at...Ch. 10 - Kerosene is pumped by a centrifugal pump. When the...Ch. 10 - In the water pump of Problem 10.8, the pump casing...Ch. 10 - Use data from Appendix C to choose points from the...Ch. 10 - Data from tests of a water suction pump operated...Ch. 10 - A centrifugal pump impeller having r1 = 50 mm, r2...Ch. 10 - A centrifugal pump impeller having dimensions and...Ch. 10 - An axial-flow fan operates in sea-level air at...Ch. 10 - Data measured during tests of a centrifugal pump...Ch. 10 - A small centrifugal pump, when tested at N = 2875...Ch. 10 - If the impeller of Problem 10.20 rotates between...Ch. 10 - At the outlet of a pump impeller of diameter 0.6 m...Ch. 10 - Typical performance curves for a centrifugal pump,...Ch. 10 - A pump with D = 500 mm delivers Q = 0.725 m3/s of...Ch. 10 - At its best efficiency point ( = 0.87), a...Ch. 10 - Using the performance curves in Appendix C, select...Ch. 10 - A pumping system must be specified for a lift...Ch. 10 - A centrifugal water pump operates at 1750 rpm; the...Ch. 10 - A set of eight 30-kW motor-pump units is used to...Ch. 10 - A blower has a rotor with 12-in. outside diameter...Ch. 10 - A centrifugal water pump has an impeller with an...Ch. 10 - Appendix C contains area bound curves for pump...Ch. 10 - Use data from Appendix C to verify the similarity...Ch. 10 - A centrifugal water pump has an impeller with...Ch. 10 - Catalog data for a centrifugal water pump at...Ch. 10 - A 1/3 scale model of a centrifugal water pump...Ch. 10 - Sometimes the variation of water viscosity with...Ch. 10 - A large deep fryer at a snack-food plant contains...Ch. 10 - Data from tests of a pump, with a...Ch. 10 - A four-stage boiler feed pump has suction and...Ch. 10 - A centrifugal pump operating at N = 2265 rpm lifts...Ch. 10 - A centrifugal pump is installed in a piping system...Ch. 10 - Part of the water supply for the South Rim of...Ch. 10 - Consider the flow system shown in Problem 8.94....Ch. 10 - Afire nozzle is supplied through 300 ft of...Ch. 10 - Performance data for a centrifugal fan of 3-ft...Ch. 10 - The performance data of Problem 10.57 are for a...Ch. 10 - Experimental test data for an aircraft engine fuel...Ch. 10 - Preliminary calculations for a hydroelectric power...Ch. 10 - Conditions at the inlet to the nozzle of a Pelton...Ch. 10 - A Francis turbine is to operate under a head of 46...Ch. 10 - A Kaplan (propeller with variable-pitch blades)...Ch. 10 - Francis turbine Units 19, 20, and 21, installed at...Ch. 10 - Measured data for performance of the reaction...Ch. 10 - For a flow rate of 12 L/s and turbine speed of 65...Ch. 10 - The velocity of the water jet driving this impulse...Ch. 10 - An impulse turbine is to develop 15 MW from a...Ch. 10 - An impulse turbine under a net head of 33 ft was...Ch. 10 - The absolute velocities and directions of the jets...Ch. 10 - A fanboat in the Florida Everglades is powered by...Ch. 10 - A jet-propelled aircraft traveling at 225 m/s...Ch. 10 - When an air jet of 1-in.-diameter strikes a series...Ch. 10 - The volume flow rate through the propeller of an...Ch. 10 - A typical American multi blade farm windmill has D...Ch. 10 - An airplane flies at 200 km/h through still air of...Ch. 10 - This ducted propeller unit drives a ship through...Ch. 10 - A model of an American multi blade farm windmill...Ch. 10 - A large Darrieus vertical axis wind turbine was...Ch. 10 - Show that this ducted propeller system when moving...Ch. 10 - This ducted propeller unit (now operating as a...Ch. 10 - What is the maximum power that can be expected...Ch. 10 - If an ideal windmill is operating at best...Ch. 10 - A prototype air compressor with a compression...Ch. 10 - Prob. 89PCh. 10 - We have seen many examples in Chapter 7 of...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Modified coefficient of performance and power input for clean condition.
Introduction to Heat Transfer
Determine the maximum normal stress developed in the bar when it is subjected to a tension of P = 8kN.
Mechanics of Materials
An insulated cylinder is divided into two pans of 1 m3 each by an initially locked piston, as shown in Fig. P3....
Fundamentals Of Thermodynamics
Wetsuits are prohibited in some triathlons due to the added buoyancy they provide the swimmer, essentially hold...
Applied Fluid Mechanics (7th Edition)
A biological fluid moves at a flow rate of m=0.02kg/s through a coiled, thin-walled, 5-mm-diameter tube submerg...
Fundamentals of Heat and Mass Transfer
The assembly consists of two A992 steel bolts AB and EF and an 6061-T6 aluminum rod CD. When the temperature is...
Mechanics of Materials (10th Edition)
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
- A centrifugal pump delivers 3000,000 liters per hour of water to a pressurized tank whose pressure is 280 kPa. The source of water is 5 meters below the pump. The diameter of the suction pipe is 300 mm and the discharged pipe is 250 mm. calculate the KW rating of the driving motor assuming the pump efficiency to be 72%.(answer is 13.16 KW)arrow_forwardQuestion 2 A centrifugal pump delivers 0.1 m³/s of water at a rotational speed of 1200 rev/min. The impeller has seven vanes which lean backwards to the direction of rotation such that the blade tip angle is 40°. The impeller has an external diameter of 0.4 m, an internal diameter of 0.2m and an axial width of 31.7 mm. Assuming that the diffuser efficiency is 51.5%, that the impeller head losses are 10% of the ideal head rise and that the diffuser exit is 0.15m in diameter, determine (a) The manometric head (b) The hydraulic efficiencyarrow_forwardThe system in Fig 2 pumps water from a lower reservoir to a higher reservoir. The pipe diameter is 0.235 m and the pipe lengths are L1= 5 m, L2= 4.5 m, L3= 1.5 m, and L4= 0.6 m. The impeller of the centrifugal pump has a diameter of 0.55 m and operates at 850 rpm. The uniform blade height is 51 mm. The water enters the pump parallel to the pump shaft with a flow rate of 0.16 m3/s. Take viscosity as 0.00112 N s/m2. Fig Q2: Piping system to pump water between two tanks. Work to 4 significant digits. Enter all values using base units or their combinations, i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa. You can use values with exponents, such as 0.12e3. a) What would be the shaft power required to turn the impeller if the exit blade angle is 31 degrees. b)arrow_forward
- The system in Fig 2 pumps water from a lower reservoir to a higher reservoir. The pipe diameter is 0.235 m and the pipe lengths are L1= 5 m, L2= 4.5 m, L3= 1.5 m, and L4= 0.6 m. The impeller of the centrifugal pump has a diameter of 0.55 m and operates at 850 rpm. The uniform blade height is 51 mm. The water enters the pump parallel to the pump shaft with a flow rate of 0.16 m3/s. Take viscosity as 0.00112 N s/m2. Fig Q2: Piping system to pump water between two tanks. Work to 4 significant digits. Enter all values using base units or their combinations, i.e. m, m/s, Pa, N. Do not use multiples as e.g. mm, kPa. You can use values with exponents, such as 0.12e3. a) What would be the shaft power required to turn the impeller if the exit blade angle is 31 degrees. b) Find the major losses in the system. Take the pipe Darcy friction factor as 0.055. c) Determine the difference in height between the water surfaces in the two tanks assuming that there are no losses within the pump.arrow_forward3. A centrifugal pump is to be placed above a large, open water tank, as shown in the figure below. Water is pumped at a rate of I cu ft/s. At this flow rate the required net positive suction head, NPSHR, is 15 ft as specified by the pump manufacturer. The water temperature is 80°F and atmospheric pressure is 14.7 psi. Assume that the major head loss between the tank and the pump inlet is due to filter at the pipe inlet having a minor loss coefficient KL.-20. Other losses can be neglected. The pipe on the suction side of the pump has a diameter of 5 in. The water vapor pressure at 80°F is 0.5069 psia and y-62.22 lb/cu.ft. Determine Z1 for cavitation not to occur.. P1-Patm (1) (2) Reference planearrow_forwardA centrifugal pump delivers 227 m³/hr of water from a source 4 meters below the pump centre line to a pressure tank whose pressure is 2.8 kg/cm² . Friction loss estimates are 2 meters in the suction line and 1 metre in the discharge line. The diameter of the suction pipe is 250 mm and the discharge pipe is 200 mm. Find: a. The water horsepower b. The kW rating of the driving motor if the pump efficiency is 70%arrow_forward
- A centrifugal pump pumps water at a flow rate of 7 m³/s to a height of 10 m. If the pump works at the best efficiency point, find the pump impeller diameter, pump speed, the best efficiency value of the pump, the head at the best efficiency value, and the specific speed of the pump, given that CQ=0.15 CH=6 CP=0.75.arrow_forwardA power plant requires 940 L/min of water. The required net head is 5 m at this flow rate. An examination of pump performance curves indicates that two centrifugal pumps with different impeller diameters can deliver this flow rate. The pump with an impeller diameter of 203 mm has a pump efficiency of 73 percent and delivers 10 m of net head. The pump with an impeller diameter of 111 mm has a lower pump efficiency of 67 percent and delivers 5 m of net head. What is the ratio of the required brake horse power (bhp) of the pump with 203-mm-diameter impeller to that of the pump with 111-mm-diameter impeller? (a) 0.45 (b) 0.68 (c) 0.86 (d) 1.84 (e) 2.11arrow_forward- A centrifugal pump with an impeller diameter of 350mm and specific speed of 19.15 and requires 15 kW to discharge 2.4 m³ /min of water, and runs at 1800 rpm. Determine the discharge, head and power required when the pump runs at 2400 rpm. The same discharge could be obtained by altering the impeller diameter without changing the rotational speed for this case find the new diameter of the impeller the head and the power required.arrow_forward
- A bilge pump discharges sea water through a 125 mm diameter pipe at a velocity of 1.2 m/s to a height of 5.8 m. The pump efficiency is 62%. If the mass density of the seawater is 1025 kg/m3 , calculate the pump’s input and output power.arrow_forwardParallel-connected double centrifugal pumps each have a specific speed of 28 and operate at 1350 rpm while delivering water with outlet velocity of flow of 3 m/s and performing 82% manometric efficiency. The impeller outer diameter and blade angle at outlet are 0.25 m and 25° to the tangent respectively. The double pumps are replaced by series-connected four centrifugal pumps to meet the same duty (same head and flow rate) with a specific speed of 30 for each pump. The outer diameter of the impeller is 0.5 m and passage width is 0.03 m. At exit, the blades are backward curved and making an angle of 14° with tangent. Draw the velocity diagrams at inlet and outlet. Determine the manometric efficiency of each pump for the in series connected pump system?arrow_forwardFor pumping a liquid refrigerant with a density of 1226 kg / m3 D1 = 200 mm, D2 = 360 mm, b1 = 50 mm, b2 = 30 mm in a designed centrifugal pump. It When the pump operates at n = 1720 rpm, H = 0.25 at a manometric head of 14.5 m It will pump this fluid at a flow rate of m3 / h. Taking Alfa 1 = 90 °, Yield = 85% and Yield h = 91%, and find the angles 1 and β2.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Fluid Mechanics - Viscosity and Shear Strain Rate in 9 Minutes!; Author: Less Boring Lectures;https://www.youtube.com/watch?v=_0aaRDAdPTY;License: Standard youtube license