Concept explainers
A self-priming centrifugal pump is used to pump water at 25°c from a reservoir whose surface is 2.2 m below the centerline of the pump inlet (Fig. P14-60). The pipe is PVC pipe with an ID of 24.0 mm and negligible average inner roughness height. The pipe length from the submerged pipe inlet to the pump inlet is 2.8 m. There are only two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged reentrant inlet (KL = 0.85), and a flanged smooth 900 regular elbow (KL = 0.3). The pump's required net positive suction head is provided by the manufacturer as a curve fit:
Want to see the full answer?
Check out a sample textbook solutionChapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
- A self-priming centrifugal pump is used to pump water at 25°C from a reservoir whose surface is 2.2 m below the centerline of the pump inlet. The pipe is PVC pipe with an ID of 26.0 mm and negligible average inner roughness height. The pipe length from the submerged pipe inlet to the pump inlet is 2.8 m. There are only two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged reentrant inlet (KL = 0.85), and a flanged smooth 90° regular elbow (KL = 0.3). The pump’s required net positive suction head is provided by the manufacturer as a curve fit: NPSHrequired = 2.2 m + [0.0013 m/(Lpm)2 ]V.2 , where volume flow rate is in Lpm. Estimate the maximum volume flow rate (in units of Lpm) that can be pumped without cavitation.arrow_forwardChoose the correct pne from the options only.arrow_forwardSaturated water at 310K is being pumped from a tank to an elevated tank at the rate of 7L/s. All of the piping is in 5-in. schedule 40 steel pipe. If the 2 fittings used is 90° ell standard long radius, The pump has an efficiency of 80%. Calculate the kW power needed for the pump. * 125 m 12 m -5 1 50 m 5-in. pipe schedule pump Your answerarrow_forward
- pleasearrow_forwardThe centrifugal pump in the figure pumps the water at 25°C from the tank 1.22 m above its inlet center. The inner diameter of the suction pipe is 101.6 mm, the coefficient of friction is 0.0306 and the length is 3.2 m. The sum of the local loss coefficients of the elements in this pipe is 7.4. If the pump operates at a flow rate of 109 m3/h, ENPY=1.52 m. Does the pump work without cavitation at this flow rate? Show the calculation. For water, p-997 kg/m3 and Pb-3.169 kPa. Patm=101.3 kPa and a2-1.05. Depo 80.a Girişteki borulama Pompa sistemi Vana m Ya9arrow_forwardConsider the hydropower schematic shown below with a lake of 70m elevation above a turbine house. Water is running through a 0.3m diameter cast-iron pipeline at 3,000 gallons per minute. Determine the head loss due to frictional effects (i.e., viscous dissipation) Calculate horsepower that can be generated with the turbine system assuming a 40% efficiency. Assume that the turbine outlet is in contact with the open atmosphere.arrow_forward
- The topic is all about Cavitation and Net Positive Suction Head. Thanksarrow_forwardB2arrow_forward2. A centrifugal pump having an overall efficiency of 75% is discharging 30 litres of waler per second througha pipe of 150 mm diameter and 125 m long. Calculate the power required to drive the pump, if the water is lifted through a height of 25 metres. Take coefficient of friction as 0-01. (Ans. 11-7kW)arrow_forward
- 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