3. A pump draws water at 300 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is 20 times the velocity head in the 200 mm diameter and the head loss from 2 to B is 20 times the velocity head in the 150-mm diameter pipe. Assume your own reservoir B elevation then compute for the energy that must be supplied to the pump in kW if said appurtenance has an efficiency of 80%. Compute also the pressure at points 1 and 2. Reservoir A 200 mm pipe Elevation=-20 m Point 1 Point 2 Pump 150 mm Reservoir B

3. A pump draws water at 300 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is 20 times the velocity head in the 200 mm diameter and the head loss from 2 to B is 20 times the velocity head in the 150-mm diameter pipe. Assume your own reservoir B elevation then compute for the energy that must be supplied to the pump in kW if said appurtenance has an efficiency of 80%. Compute also the pressure at points 1 and 2. Reservoir A 200 mm pipe Elevation=-20 m Point 1 Point 2 Pump 150 mm Reservoir B

Sustainable Energy

2nd Edition

ISBN:9781337551663

Author:DUNLAP, Richard A.

Publisher:DUNLAP, Richard A.

Chapter18: Energy Storage

Section: Chapter Questions

Problem 20P

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Similar questions

Two reservoirs A and B having elevations 250 m and 100 m respectively are connected by a 250 mm diameter pipe 250 m long. A turbine is installed between the two reservoirs. The flow of water in the pipe is 140 liters per second. Use C1 = 120. Compute for (a) the head loss in meters in the pipe due to friction, (b) the head in meters extracted by the turbine, and (c) the power generated by the turbine in kW
A water pump at elevation 46 m. is used to bring up 250 gpm of water from a river (elev. 45 m.) to reservoir at elevation 100 m. If the suction pipe from the river to the pump is 8 inches in diameter with a head loss of 4 times its velocity head and the discharge pipe from the pump to the reservoir is 6 inches in diameter with a head loss of 25 times its velocity head, determine the output of the pump in horsepower. A. 10.6hp B. 11.6 hp C. 12.6 hp D. 9.6 hp A 3 mm diameter tube is connected in series to a 12 mm diameter tube. Water Flows at 0.5 m/s in the larger tube. Determine the velocity in the smaller tube. A. 6 m/s B. 10 m/s C. 8 m/s D. 12 m/s
The difference of elevation between the top of the water of the two reservoirs is 125m. If the top of the water of reservoir B has an elevation of 25m and in between the two reservoirs there is a pump- turbine with a design flow rate in both directions of 120 cubic meter per minute and a head loss due to friction of 15m and an efficiency of 75% for both pump and turbine, Determine the ff: a. the power output by the turbine to draw water from the upper reservoir to produce power to a city and b. the power required by the pump, to pump water from the lower reservoir to the upper reservoir to restore energy to the upper reservoir.
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A 24 in. pipe conducts water from reservoir A to a pressure turbine (elev. = 20'), which discharges through another 24 in. pipe into tailrace B (elev. = 5'). The loss of head from A to 1 is 5 times the velocity head in the pipe and the loss of head from 2 to B is 0.2 times the velocity head in the pipe. What must water surface elevation at the reservoir be maintained such that the energy given up in the turbine is 555 hp? Assume discharge equals 30 cfs. Also, draw the H.G.L. and the E.G.L. Express all dimensions in English units.
From a reservoir whose surface elevation is at 30 m, water is pumped to an elevated reservoir at an elevation of 95 m. The head loss in the 60 cm diameter suction pipe is 10 m and that of the 50 cm discharge pipe is 15 m. Determine the following if the discharge is to be maintained at 480 liters per second. Assume total head loss between the two reservoirs is 20 m. Compute the power input of the pump assuming it operates at 80% efficiency.
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A pump draws 24L/s of water from reservoir A and lifts it to reservoir B. The head lost from A to 1 is 3 times the velocity head in the 150mm suction line and the head lost from 2 to B is 25 times the velocity head in the 100mm discharge line. (A) What is the power delivered by the pump to the system in hp? (B) What is the pressure head in meters in point 1? (C) What is the pressure head in meters in point 2?
Two reservoirs (EI 37.6m and EI 91.6m) are connected by two pipelines 1-2 and 2-3 with a pump bridging the two pipelines. If the fluid (sg=0.81) flows at a rate of 203 L/s, what is the power given by pump? Assume head losses of 2.3 j/n from 1-2 and 6.5 j/n from 2 to 3