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 132P
To determine
The correct option for "The net positive suction head at the pump inlet".
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A remote community in the Mountain Province plans to put up a small hydroelectric power plant to service six (6) closely located barangays estimated to consume 52, 650, 000 kw-hrs annually. The expected flow of water is 1665 m-/min. The most favorable location for the plant fixes the tail water level at 480 meters. The manufacturer of the turbine-generator set has indicated the following performance data: turbine efficiency = 87%; generator efficiency = 92%; loss in headwork will not exceed 3.8% of available head. In order to pinpoint the most suitable area for the dam, determine: (a) the head water elevation in meters
Please include a diagram.A pump supplies water at a flow rate of 4ft3/s from an open reservoir through a horizontal 8-in sched 40 pipe. The head loss from the reservoir to the suction of the pump is 2 ft-lbf/lbm, and the discharge is at 90 psig into a 6-in sched 80 pipe. The pump has an efficiency of 65%
answer the following:a.) The head that must be delivered by the pump to the water is ________ or energy developed by the pump or output energy of the pumpb.) input energy to the pumpc.) Rated power of the pump in kW
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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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- A pump with an overall efficiency of 60% is pumping an acid (p= 1800kg/m3) from an open tank (atmospheric pressure) to a reactor unit at the rate of (8 square root 8) kg/s. This unit operates at 8000 Pa gauge and the acid is discharged into it with a velocity of 0.24 m/s at a point 6m above the acid surface level in the tank. Determine the power required (kW) to run the pump if the sum of the major and minor energy losses are equivalent to 3m of H2O head.arrow_forwardAn ice plant owner decided to install a water pump from a nearby clean fresh water source to supply its water requirements. The capacity of the pump is 45.5 cu m per hour against a head of 43 meters with an efficiency of 70% at full load and 40% at half load. The total cost of the pumping unit including the piping system of the plant is P 700,000 with zero salvage value at the end of the its estimated life of 20 years. The prime mover of the pump is an electric motor and cost of power is P2.10 per kwh. Taxes, insurances and maintenance cost is 1.5% of the first cost per year. The pump will operate 200 days continuous operation per year at half load and 150 days at full load. If cost of money is 12%, how much will it cost the owner to operate the pump per cubic meter?arrow_forwardNeed help with this questionarrow_forward
- Water is to be pump from a reservoir with a temperature of 32oC at sea level. Friction loss at suction is 0.3 m and the suction elevation is 2.45 m below pump centerline. Determine the available NPSH for this pump installation if at 32oC, Psat = 4.798 kPa & specific volume is 0.001006 m3/kg.arrow_forwardanswer first item onlyarrow_forwardExplain and Plot the process why the Height(H) arrive in meter(m) unit and the Velocity of water arrive in meter per second (m/s) unit. "A boiler feed pump has a suction enthalpy of 2500 KJ/kg and exit of 2505KJ/kg"arrow_forward
- Energy balance. The flow rate of water is 0.021 m'/s through a 355-m long, 11-cm-diameter pipe (shown below and not to scale). The turbine that has an efficiency of 82% is used to recover the potential energy and generate power. Both reservoirs are very very large and contain water at 8°C. The roughness of the galvanized iron pipe is 0.14 mm. Problem 2 105 m 42 m What is the turbine output, i.e., how much usable power can obtained from the turbine?arrow_forwardUnderground water is pumped to a pool at a given elevation. The maximum flow rate and the pressure difference across the pump are to be determined. The pump-motor draws 3-kW of power, and is 70% efficient. Then the useful mechanical power it delivers to the fluid isarrow_forwardInclude a fre body diagram Water enters a pump at 350 kPa at a rate of 1 kg/s. The water leaving the pump enters a turbine in which the pressure is reduced and electricity is produced. The shaft power input to the pump is 1 KW snd the shaft power output the turbine is 1 kW. Both the pump and turbine are 90% efficient. If the elevation and velocity of the water remain constant through out the flow and irreversible headloss is 1 m, the pressure of water in kPa at the turbine exit isA. 126B. 131C. 127D. 129arrow_forward
- The topic is all about Cavitation and Net Positive Suction Head. Thanksarrow_forwardThe water needs of a small farm are to be met by pumping water from a well that can supply water continuously at a rate of 50 L/min. The water level in the well is 13 m below the ground level, and water is to be pumped to the farm by a 2-cm internal diameter pipe. The required length of piping is measured to be 20 m, and the total head loss in the piping system is estimated to be 10 m. a) Using Bernoulli equation, determine the pressure difference between the two points (A & B). b) Taking the efficiency of the pump to be 70 percent, determine the rated power of the pump that needs to be purchased.arrow_forwardThe water needs of a small farm are to be met by pumping water from a well that can supply water continuously at a rate of 50 L/min. The water level in the well is 13 m below the ground level, and water is to be pumped to the farm by a 2-cm internal diameter pipe. The required length of piping is measured to be 20 m, and the total head loss in the piping system is estimated to be 10 m.a) Using Bernoulli equation, determine the pressure difference between the two points (A & B).arrow_forward
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