A hydraulic pump delivers 0.5 m³/s of water against a head of 5.5 m. If the...
A hydraulic pump delivers 0.5 m³/s of water against a head of 5.5 m. If the power needed to drive the pump is 33 KW, calculate the efficiency
Homework Answers
Solution - Given that water flow rate Q = 0.5 m³/s
Head H = 5.5 m
Power input to pump 
Now power output from the pump is
Now efficiency of the pump is given by
= 81.75
%
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A hydraulic pump delivers 0.5 m³/s of water against a head of
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2.4 A centrifugal pump delivers 26 I/s against a total head of 16 m at 1450...
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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...
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1. A pump steadily delivers 13.7 kg/s of water at the conditions given below. Calculate the...
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Q4. A pump draws water from a large reservoir and delivers it to another reservoir whose water surface is 10 m higher than the pump centreline and that the pump is 1.5 meter above the suction reservo...
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Problem Statement A manufacturer produces a centrifugal pump with a 35 cm impeller that delivers 220...
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3. The manufacturers rating for a centrifugal pump shows that the pump delivers 160 gpm at...
3. The manufacturers rating for a centrifugal pump shows that the pump delivers 160 gpm at 80 ft of head when the pump speed is 3000 rpm. This rating is for the best operating point of the pump: the efficiency at this point is 59 percent. (be careful with units) (a) Calculate the specific speed of the pump. (b) What is the horsepower required to operate the pump at the manufacturers rating? (c) A 1.8 horsepower motor with a speed...
b) A radial vaned centrifugal compressor delivers 0.3 m3/s against a head of 20 m. The...
b) A radial vaned centrifugal compressor delivers 0.3 m3/s against a head of 20 m. The flow velocity is constant at 3 m/s. The manometric efficiency is 80%. If the width is 1/10th of the diameter, calculate the diameter, width and speed. The eye diameter is O C0.5 of outer diameter. Calculate the dimensions of inlet. a contrifudal compreesor havina imoeller of inner diameter 20 cm & outer diameter of
a pump that delivers 4.5 kw to the water (v=0.898x10^-6 m^2/s ; p=99.1kg/m^3) is used to...
a
pump that delivers 4.5 kw to the water (v=0.898x10^-6 m^2/s ;
p=99.1kg/m^3) is used to fill a cylindrical tank as shown,
calculate the flow rate and the depth of the water in the
cylindrical tank 5 minutes after the pump is started. Assume the
sum of the loss coefficients of the fittings=12.8
B 2 m d=100 mm smooth pipe Pipe length = 50 m 12 m 19 A
theavton the ump.if the absolute pressure of the liquid drops below the vapor pressure then cavitation will occur Answer B) False A) True A centrifugal pump delivers water against a net head of 20 meters and a design speed of 1100 rpm. is 10 m/s. he impeller diameter is 0.4 m. Determine manometric efficiency of the pump, if Co2 Intr E) 95% D) 92% A) 85% C) 90% B) 88% Answer In Calculate net head or effective head for Pelton...
A 1/4-scale model centrifugal pump is tested to pump water with density of 1000 kg/m under a head of 7.5 m at speed of 500 rpm. It was found that 7.5 kW was needed to drive the model. Assuming the pumps is geometrical similar and similar mechanical efficiency, determine; (i) speed and power required by the prototype when pumping against a head of 44 m; ratio of the discharges between model and prototype; and head, capacity and power coefficient of...
2.4 A centrifugal pump delivers 26 I/s against a total head of 16 m at 1450 rpm. The impeller diameter is 0.5m. A gcometrically similar pump of 30 cm diameter is running at 2900rpm. Calculate head and discharge required assuming equal efficiencies between the two pumps (11.52 m, 11.23 l/s)
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)...
Q4. A pump draws water from a large reservoir and delivers it to another reservoir whose water surface is 10 m higher than the pump centreline and that the pump is 1.5 meter above the suction reservoir. The total suction and deliver pipe used is 21.1 m in length, 9 cm in diameter and has a Darcy friction factor f0.0339. The pump operates at 750 rpm and its characteristic performances are given in table below: Q (m3 s H (m)15...
Problem Statement A manufacturer produces a centrifugal pump with a 35 cm impeller that delivers 220 L/min and 28 m of head at an efficiency of 82%. They want to produce a larger version of the same pump design that will produce twice the flow at four times the head. The fluid is water with p=998 kg/m”. What brake horsepower (in kW) will the new pump require? Answer Table Value Description New brake horsepower (kW)
3. The manufacturers rating for a centrifugal pump shows that the pump delivers 160 gpm at 80 ft of head when the pump speed is 3000 rpm. This rating is for the best operating point of the pump: the efficiency at this point is 59 percent. (be careful with units) (a) Calculate the specific speed of the pump. (b) What is the horsepower required to operate the pump at the manufacturers rating? (c) A 1.8 horsepower motor with a speed...
b) A radial vaned centrifugal compressor delivers 0.3 m3/s against a head of 20 m. The flow velocity is constant at 3 m/s. The manometric efficiency is 80%. If the width is 1/10th of the diameter, calculate the diameter, width and speed. The eye diameter is O C0.5 of outer diameter. Calculate the dimensions of inlet. a contrifudal compreesor havina imoeller of inner diameter 20 cm & outer diameter of
a
pump that delivers 4.5 kw to the water (v=0.898x10^-6 m^2/s ;
p=99.1kg/m^3) is used to fill a cylindrical tank as shown,
calculate the flow rate and the depth of the water in the
cylindrical tank 5 minutes after the pump is started. Assume the
sum of the loss coefficients of the fittings=12.8
B 2 m d=100 mm smooth pipe Pipe length = 50 m 12 m 19 A
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