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A submersible deep-well pump delivers
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Applied Fluid Mechanics (7th Edition)
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Engineering Mechanics: Statics
- Topics: Fundamental of fluid flow Oil (SG=0.82) entering a pump through an 8-inch diameter pipe at 4 psi has a flow rate of 3.5 cfs. It leaves the pump through a 4-inch diameter pipe at 15 psi. Assuming that the suction and discharge sides of the pump are at the same elevation, find the horsepower delivered to the water by the pump (550 lb.ft/s = 1 HP). Illustrate the problem and show your complete solution.arrow_forward5.19 Consider the piping system shown in the following diagram. The pump operates at 1750 rpm. El 1475' L= 8000'; D = 12";f=0.026 El 1200' Pump 106 Turbomachinery: Concepts, Applications, and Design The pump curve is given by h,=350-24Q² where h, is given in ft. and Q in cfs. What would the head and flow rate delivered be under these conditions? Ans: Q=160 cfs; h,=288 ft 5.20 Solve the previous problem for two identical pumps connected in (a) series and (b) parallel. Ans: a) Q=2.83 cfs, h,=315 ft; b) Q=2.58 cfs; h,=310 ft %Darrow_forwardA groundwater well with produces 80 m/hr. and has a hydraulic conductivity of 20 m/d. Calculate the following: a. The length of the screen b. The diameter of the delivery pipe. c. The velocity head and the friction losses in the delivery pipe. d. What is the required power of the pump if the abstraction efficiency was 70%? Assume the following: The percentage of the opening in the screen is 17%, the entrance velocity is 1.55 cm/sec, the diameter of the screen is 30 cm, water velocity in the tube is 2.2 m/sec. Assume any missing data.arrow_forward
- A pump is driven by an electric motor moves 35 gal/min of water from reservoir A to reservoir B, lifting the water to a total head of 245 ft. The efficiency of the pump and motor are 64% and 84% respectively. What size of motor (HP) is required? a. 3 hp b. 5 hp c. 4 hp d. 7 hparrow_forwardQ1. The pump with 96.52 cm in diameter characteristics shown in figure below is used to pump water to the system. Neglecting local losses, www a) Calculate flow rate and pump power. b) A new pump from the family with 60 cm in diameter is produced. It oparates with the speed of n=1500 rpm and used to pump gasoline (SG=0.86). Estimate discharge, head and power of the new pump. Note Pipe is cast iron with 0.5 m in diamater and 900 m in length. Fluid is water with density 1000 kg/m³. Take f=0.02 in the analysis. www (a) hil n=710 d'dak 72m 120 7.5 ENPY 105 - 105.4 cm çap 4.5 90 96.52 cm çap 75 - 88.9 cm çap 60 48m 45 30 0.25 0.50 0.75 1.00 1.25 1.50 1.75 Debi ms ENPY m 98 %88 1100 kW 900 kW 750kW Yak, marrow_forwardSuppose the pump of Fig. is situated between two large water tanks with their free surfaces open to the atmosphere. Explain qualitatively what would happen to the pump performance curve if a valve in the piping system were changed from 100 percent open to 50 percent open, all else being equal. Repeat for the system curve. What would happen to the operating point—would the volume flow rate at the operating point decrease, increase, or remain the same? Indicate the change on a qualitative plot of H versus V. , and discuss.arrow_forward
- QUESTION 3 A submersible deep-well pump delivers 250L/min of water through a 1-in Schedule 40 pipe when operating in the system sketched in Fig. 3. An energy loss of 2.3 m occurs in the piping system. (a) Calculate the power delivered by the pump to the water. (b) If the pump draws 1 hp, calculate its efficiency. A 27 kba 12 marrow_forwardThe plunger diameter of a single acting reciprocating pump is 115 mm and the stroke is 230 mm. The suction pipe is 90 mm in diameter and 4.2 m long. If cavitation takes place at the suction head of 4 m, the barometer stands at 10,3 m of water, and the water level in the sump is 3 m below the pump cylinder axis. 2.1 Find the maximum allowable speed to operate the pump 2.2 What power is expected in overcoming friction at this speed, take f=0.01arrow_forwardExercise Problem No. 2: The water flow of 35,000 Liters/min was developed into a booster station with a pump installed rated as follows: Pressure at Discharge side= 4.18 bars, 850mm above the pump C.L. Suction Pressure= 220mmHg vacuum, 425mm below the pump C.L. Pipe Dia @ suction=16 inches and Pipe Dia @ Discharge 12 ½ inches. 1. Draw the illustrative diagram 2. Calculate the Head at discharge, Velocity Head, Elevation Head and the Total Head of the Pump.arrow_forward
- Question -4: Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in the Fig.4 and discharges into the atmosphere with a velocity of 3 m/s. minor loss are negligible. a) If the efficiency of the pump is 70%, how much power is being supplied to the pump b) What is the NSPHA at the pump inlet? (1) 3 m Diameter = 50 mm, PUMP Length = 200 m Fig.4arrow_forwardThe pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 2.0 ft/s. The energy loss between the suction pipe inlet and the pump is 6 lb-ft/lb and that between the pump outlet and the upper reservoir is 12 lb-ft/lb. Both pipes are 6-in Schedule 40 steel pipe. Calculate (a) the pressure at the pump inlet, (b) the pressure at the pump outlet, (c) the total head on the pump, and (d) the power delivered by the pump to the Assume that the level of the lower reservoir is 10 ft above the pump instead of below it. All other data remain the same.arrow_forwardA centrifugal pump delivers 2.5 cfs of water against a head of 25 ft at 1500 rpm and requires 10 hp. If the speed is reduced to 1250 rpm calculate the flow (in m^3/s), assuming the same efficiency.arrow_forward
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