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The value of (NPSHfor a pump is given by the manufacturer as 20 ft. Water is...
A pump is located 20 feet below a supply reservoir. The head loss in the pipe...
A pump is located 20 feet below a supply reservoir. The head loss in the pipe from the reservoir to pump is 2.6 ft of water. Assuming atmospheric pressure to be 14.7 psia and vapor pressure of water to be 0.256 psia, the Net Positive Suction Head Available (NPSHA) is:
11. Water is pumped from a reservoir at a lower elevation to an elevated reservoir by...
11. Water is pumped from a reservoir at a lower elevation to an elevated reservoir by using a suitable pump. The lower reservoir water level have an atmospheric pressure head of I and is at an elevation of 20 ft. while the intake/suction side of the pump is at an elevation of 25 ft. The water is pumped at a rate of 425 gpm in a 6" diameter pipe, friction factor () is 0.017 and the length of pipe is...
A centrifugal pump is placed above a reservoir as shown below. If the NPSHR is 17...
A centrifugal pump is placed above a reservoir as shown below. If the NPSHR is 17 ft and the flow rate is 32 ft3/s, determine the maximum height, 21, that the pump can be located above the reservoir surface without cavitation. Assume that the total head loss between the tank and pump inlet is 10 ft. The diameter of the pipe on the suction side of the pump is 12 inches. The reservoir surface is at atmospheric pressure, Patm =...
A centrifugal pump is used to pump water at 77ºF from a reservoir whose surface is 20 ft above th...
A centrifugal pump is used to pump water at 77ºF from a reservoir whose surface is 20 ft above the centerline of the pump inlet. The Pipe System consists of 67.5 ft of PVC pipe with a 1.2 in ID and negligible average internal roughness height. The length of the pipe from the bottom of the lower tank to the pump inlet is 12 ft. There are several minor losses in the pipe: an acute edge entry (KL = 0.5),...
A pump delivers water at 200C between a reservoir and a water tank that is 75[ft] higher than the...
A pump delivers water at 200C between a reservoir and a water tank that is 75[ft] higher than the reservoir. The suction side of the system consists of a cast iron pipe of 1[ft]diameter with a strainer (Ks= 2.5) and four 90-degree bends at R/D= 5. The discharge side of the system includes a 1000[ft] long commercial steel pipe with 12” diameter followed by a gate valve. The NPSH required for the pump is 10[ft], and the design discharge is...
Problem 4 The pumping system shown in the figure below to deliver 3 cfs of 60°F...
Problem 4 The pumping system shown in the figure below to deliver 3 cfs of 60°F water. The total elevation difference between is 84 ft. The suction line is a 6-inch diameter, 300-ft long cast-iron pipe. The discharge line is 6-inch diameter in an 860-ft long plastic pipe. The suction inlet for the pump is 20 ft above the reservoir. The atmospheric pressure is 14.70 psia. The required NPSH is 7.0 ft. Minor losses include entrance: k, = 0.5, open...
7.14 The pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 0.057 m3/s. The energy loss between the suction pipe inlet and the pump is 1.83 m and that between t...
7.14 The pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 0.057 m3/s. The energy loss between the suction pipe inlet and the pump is 1.83 m and that between the pump outlet and the upper reservoir is 3.66 m. 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)...
A reservoir has a lower water level set at 200 ft. The pump is set at...
A reservoir has a lower water level set at 200 ft. The pump is set at an elevation of 190 ft. It was determined through analysis that an existing pump is experiencing cavitation. Which of the following will decrease the risk of cavitation? Select all that apply. A) Raise the elevation of the pump. B) Increase the temperature of the water. C) Decrease the diameter of the suction pipeline. D) Operate the pump at a lower speed. E) Increase the...
4. The discharge pressure gauge reading is 5 lb/in2 (psi) for the pumping system shown in the ske...
4. The discharge pressure gauge reading is 5 lb/in2 (psi) for the pumping system shown in the sketch below, with the outlet nozzle discharging a 2-inch diameter stream of water directly to the atmosphere. The gauge pressure at the pump suction inlet at the point of incipient cavitation is (-2,071.12) lb/ft, i.e., for vapor pressure of water at 68° F of 50.54 lb/ft2 absolute, and standard atmospheric pressure 30 in Hg. Friction losses in the suction piping from the reservoir...
Clean engine oil is pumped through a pipe %)n, in diameter and 10 ft long, as shown. Pressure is ...
Clean engine oil is pumped through a pipe %)n, in diameter and 10 ft long, as shown. Pressure is atmospheric both at the inlet to the pump and at the exit from the pipe. The average velocity of the oil is 1.5 ft/s Assuming fully-developed laminar tlow, calculate the pressure rise across the pump (in psia) and the power input of the pump (in hp) if the oil temperature is a) 70°F 4. b) 40°F atn
Clean engine oil is...
A pump is located 20 feet below a supply reservoir. The head loss in the pipe from the reservoir to pump is 2.6 ft of water. Assuming atmospheric pressure to be 14.7 psia and vapor pressure of water to be 0.256 psia, the Net Positive Suction Head Available (NPSHA) is:
11. Water is pumped from a reservoir at a lower elevation to an elevated reservoir by using a suitable pump. The lower reservoir water level have an atmospheric pressure head of I and is at an elevation of 20 ft. while the intake/suction side of the pump is at an elevation of 25 ft. The water is pumped at a rate of 425 gpm in a 6" diameter pipe, friction factor () is 0.017 and the length of pipe is...
A centrifugal pump is placed above a reservoir as shown below. If the NPSHR is 17 ft and the flow rate is 32 ft3/s, determine the maximum height, 21, that the pump can be located above the reservoir surface without cavitation. Assume that the total head loss between the tank and pump inlet is 10 ft. The diameter of the pipe on the suction side of the pump is 12 inches. The reservoir surface is at atmospheric pressure, Patm =...
Problem 4 The pumping system shown in the figure below to deliver 3 cfs of 60°F water. The total elevation difference between is 84 ft. The suction line is a 6-inch diameter, 300-ft long cast-iron pipe. The discharge line is 6-inch diameter in an 860-ft long plastic pipe. The suction inlet for the pump is 20 ft above the reservoir. The atmospheric pressure is 14.70 psia. The required NPSH is 7.0 ft. Minor losses include entrance: k, = 0.5, open...
7.14 The pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 0.057 m3/s. The energy loss between the suction pipe inlet and the pump is 1.83 m and that between the pump outlet and the upper reservoir is 3.66 m. 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)...
A reservoir has a lower water level set at 200 ft. The pump is set at an elevation of 190 ft. It was determined through analysis that an existing pump is experiencing cavitation. Which of the following will decrease the risk of cavitation? Select all that apply. A) Raise the elevation of the pump. B) Increase the temperature of the water. C) Decrease the diameter of the suction pipeline. D) Operate the pump at a lower speed. E) Increase the...
4. The discharge pressure gauge reading is 5 lb/in2 (psi) for the pumping system shown in the sketch below, with the outlet nozzle discharging a 2-inch diameter stream of water directly to the atmosphere. The gauge pressure at the pump suction inlet at the point of incipient cavitation is (-2,071.12) lb/ft, i.e., for vapor pressure of water at 68° F of 50.54 lb/ft2 absolute, and standard atmospheric pressure 30 in Hg. Friction losses in the suction piping from the reservoir...
Clean engine oil is pumped through a pipe %)n, in diameter and 10 ft long, as shown. Pressure is atmospheric both at the inlet to the pump and at the exit from the pipe. The average velocity of the oil is 1.5 ft/s Assuming fully-developed laminar tlow, calculate the pressure rise across the pump (in psia) and the power input of the pump (in hp) if the oil temperature is a) 70°F 4. b) 40°F atn
Clean engine oil is...
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