Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Chapter 14, Problem 129P
To determine
The net head of the pump.
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The design of a new dam reveals that a water head of 10 meter and water flow rate of 100 cubic meter per second (m3/s) can be supplied for electricity generation. What kind of turbines would you recommend for the electric power generation?
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(Patm= 101325 Pa, dsu=1000 kg/m3)
Chapter 14 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 14 - What is the more common term for an...Ch. 14 - What the primary differences between fans,...Ch. 14 - List at least two common examples of fans, of...Ch. 14 - Discuss the primary difference between a porn...Ch. 14 - Explain why there is an “extra” term in the...Ch. 14 - For a turbine, discuss the difference between...Ch. 14 - Prob. 7CPCh. 14 - Prob. 8PCh. 14 - Prob. 9PCh. 14 - Prob. 10CP
Ch. 14 - There are three main categories of dynamic pumps....Ch. 14 - For each statement about cow cetrifugal the...Ch. 14 - Prob. 13CPCh. 14 - Consider flow through a water pump. For each...Ch. 14 - Write the equation that defines actual (available)...Ch. 14 - Consider a typical centrifugal liquid pump. For...Ch. 14 - Prob. 17CPCh. 14 - Consider steady, incompressible flow through two...Ch. 14 - Prob. 19CPCh. 14 - Prob. 20PCh. 14 - Suppose the pump of Fig. P1 4-19C is situated...Ch. 14 - Prob. 22PCh. 14 - Prob. 23EPCh. 14 - Consider the flow system sketched in Fig. PI 4-24....Ch. 14 - Prob. 25PCh. 14 - Repeat Prob. 14-25, but with a rough pipe-pipe...Ch. 14 - Consider the piping system of Fig. P14—24. with...Ch. 14 - The performance data for a centrifugal water pump...Ch. 14 - For the centrifugal water pump of Prob. 14-29,...Ch. 14 - Suppose the pump of Probs. 14-29 and 14-30 is used...Ch. 14 - Suppose you are looking into purchasing a water...Ch. 14 - The performance data of a water pump follow the...Ch. 14 - For the application at hand, the flow rate of...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - For the pump and piping system of Prob. 14-35E,...Ch. 14 - A water pump is used to pump water from one large...Ch. 14 - Suppose that the free surface of the inlet...Ch. 14 - Calculate the volume flow rate between the...Ch. 14 - Comparing the results of Probs. 14-39 and 14-43,...Ch. 14 - Prob. 45PCh. 14 - The performance data for a centrifugal water pump...Ch. 14 - Transform each column of the pump performance data...Ch. 14 - 14-51 A local ventilation system (a hood and duct...Ch. 14 - Prob. 52PCh. 14 - Repeat Prob. 14-51, ignoring all minor losses. How...Ch. 14 - Suppose the one- way of Fig. P14-51 malfunctions...Ch. 14 - A local ventilation system (a hood and duct...Ch. 14 - For the duct system and fan of Prob. 14-55E,...Ch. 14 - Repeat Prob. 14-55E, ignoring all minor losses....Ch. 14 - A self-priming centrifugal pump is used to pump...Ch. 14 - Repeat Prob. 14-60. but at a water temperature of...Ch. 14 - Repeat Prob. 14-60, but with the pipe diameter...Ch. 14 - Prob. 63EPCh. 14 - Prob. 64EPCh. 14 - Prob. 66PCh. 14 - Prob. 67PCh. 14 - Prob. 68PCh. 14 - Prob. 69PCh. 14 - Two water pumps are arranged in Series. The...Ch. 14 - The same two water pumps of Prob. 14-70 are...Ch. 14 - Prob. 72CPCh. 14 - Name and briefly describe the differences between...Ch. 14 - Discuss the meaning of reverse swirl in reaction...Ch. 14 - Prob. 75CPCh. 14 - Prob. 76CPCh. 14 - Prob. 77PCh. 14 - Prob. 78PCh. 14 - Prob. 79PCh. 14 - Prob. 80PCh. 14 - Wind ( =1.204kg/m3 ) blows through a HAWT wind...Ch. 14 - Prob. 82PCh. 14 - Prob. 84CPCh. 14 - A Francis radial-flow hydroturbine has the...Ch. 14 - Prob. 87PCh. 14 - Prob. 88PCh. 14 - Prob. 89PCh. 14 - Prob. 90CPCh. 14 - Prob. 91CPCh. 14 - Discuss which dimensionless pump performance...Ch. 14 - Prob. 93CPCh. 14 - Prob. 94PCh. 14 - Prob. 95PCh. 14 - Prob. 96PCh. 14 - Prob. 97PCh. 14 - Prob. 98PCh. 14 - Prob. 99PCh. 14 - Prob. 100EPCh. 14 - Prob. 101PCh. 14 - Calculate the pump specific speed of the pump of...Ch. 14 - Prob. 103PCh. 14 - Prob. 104PCh. 14 - Prob. 105PCh. 14 - Prob. 106PCh. 14 - Prob. 107EPCh. 14 - Prob. 108PCh. 14 - Prob. 109PCh. 14 - Prob. 110PCh. 14 - Prove that the model turbine (Prob. 14-109) and...Ch. 14 - Prob. 112PCh. 14 - Prob. 113PCh. 14 - Prob. 114PCh. 14 - Prob. 115CPCh. 14 - Prob. 116CPCh. 14 - Prob. 117CPCh. 14 - Prob. 118PCh. 14 - For two dynamically similar pumps, manipulate the...Ch. 14 - Prob. 120PCh. 14 - Prob. 121PCh. 14 - Prob. 122PCh. 14 - Calculate and compare the turbine specific speed...Ch. 14 - Prob. 124PCh. 14 - Prob. 125PCh. 14 - Prob. 126PCh. 14 - Prob. 127PCh. 14 - Prob. 128PCh. 14 - Prob. 129PCh. 14 - Prob. 130PCh. 14 - Prob. 131PCh. 14 - Prob. 132PCh. 14 - Prob. 133PCh. 14 - Prob. 134PCh. 14 - Prob. 135PCh. 14 - A two-lobe rotary positive-displacement pump moves...Ch. 14 - Prob. 137PCh. 14 - Prob. 138PCh. 14 - Prob. 139PCh. 14 - Prob. 140PCh. 14 - Which choice is correct for the comparison of the...Ch. 14 - Prob. 142PCh. 14 - In a hydroelectric power plant, water flows...Ch. 14 - Prob. 144PCh. 14 - Prob. 145PCh. 14 - Prob. 146PCh. 14 - Prob. 147PCh. 14 - Prob. 148PCh. 14 - Prob. 149PCh. 14 - Prob. 150PCh. 14 - Prob. 151P
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- In order to drain the tank faster, a pump is installed near thetank exit. Determine how much power input is necessary toestablish an average water velocity of 4 m/s when the tank isfull at 2 m.arrow_forwardA proposed hydroelectric plant is to have a flow of 200 cfs against a net head of 30 ft. The proposed turbines to be used has a speed of 200 RPM and the expected power output is 450 kW. Determine the type of turbine to be installed in this plantarrow_forwardIn order to drain the tank faster, a pump is installed near thetank exit. Determine how much power input is necessary toestablish an average water velocity of 4 m/s when the tank isfull at 2 m. diameter is 10cmarrow_forward
- Water is pumped from a large lower reservoir to a higher reservoir. Someone claims that if the head loss is negligible, the required pump head is equal to the elevation difference between the free surfaces of the two reservoirs. Do you agree?arrow_forwardA Francis turbine develops 3 MW under a head of 50 m at an overall efficiency of 88%. The diameterof the runner at the inlet is 80 cm and runner rotates with 300 rpm. If hydraulic efficiency of the turbine is90% and runner height at the inlet is 10cm, calculate (a) guide vane angle at inlet (b) blade angle at inletand (c) degree of reaction of the turbine.arrow_forwardA pump has a head of 20m at 450rpm. What is the increase in head developed by the pump if speed increase to 1000rpm? ANSWER: 78.76 marrow_forward
- 4. Hydroelectric plants in the mountains bring water from a reservoir down to a turbine through enclosed tubes. In such plants, the 100 cm diameter intake tube (Point 2) in the dam is 50m below the water surface (Point 1) of the reservoir. The water drops 200 m through the tube before flowing into the turbine through a 50 cm diameter nozzle.arrow_forwardwater flows through a horizontal venturyi meter whose inlet diameter is 33 cm. and throat diameter is 21 cm. the pressure at the inlet is 775 kpa and at the throat is 584 kPa. determine the discharge in L/s. neglect head lost.arrow_forwardA pump is required to move water at a design discharge of 1m3 /s between reservoirA to reservoir B (see schematic below). The difference in surface water elevations between A and B is10m. The difference in elevation between the surface elevation of A and the center of the first pipe sectionis 2m. The pipe is to be commercial steel with an internal diameter of 35cm. Determine the maximumdistance, LAP, from reservoir A that the pump could be installed without encountering cavitationproblems. Consider minor losses of a sharp-edged inlet. Assume a kinematic viscosity of 1x10-6 m 2/s and a specific weight of 9.79kN/m3 . Assume STP conditions (i.e., Pvapor = 3kPa, Patm=101.3kPa)arrow_forward
- The penstock of hydroelectric turbine is 0.5m x 0.5m with velocity of 5.5m/s and head of 20m. What is the output of the turbine if the turbine efficiency is 92%?arrow_forwardThe diameter of the discharge pipe of pump is 15 cm and that of intake pipe is 20 cm. The pressure gage at discharge reads 257 kPa and a vacuum gage at intake reads 195mm Hg. The flow rate is 90000 L/min and the applied torque in the pump shaft is 6.5 kN.m for a mechanical efficiency is 88% determine a.) the pump used; b.) the pumps to be used for a four-parallel pump arrangement.arrow_forwardA pump was installed with a suction head of 6 meter and a discharge head of 10 meters. The discharge rate of the pump is 60 liters per minute. What is the water horsepower of the pump?arrow_forward
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