How much shaft work is required to pump 10 gal/ min (6 L/s) of octane from...
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A chilled-water system requires a 100 gal/min pump with 40 ftWG of head. Select the most appropriate pump from the pump curves in the figure below. State the efficiency, motor power input, impeller size, and NPSH requirement for your selection. Note that the pump may not be a precise match to the specified flow condition Capacity (L/s) 10 12 18 60% 40% 50%: 55%,65% о, 68% 67% 7" 1750 50 68% 12...
Problem 5: The 28-in-diameter pump in the Figure at 1170 r/min is used to pump water at 20°C through a piping system at 14,000 gal/min. (a) Determine the required brake horsepower. The average friction factor is 0.018. (b) If there is 65 ft of 12-in-diameter pipe upstream of the pump, how far below the surface should the pump inlet be placed to avoid cavitation? Given that the water at 20 °C has a specific weight of 62.4 lbf/ft and vapor...
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...
Fluid Mechanics & Fluid Power
Determine the NPSH available. The pressure in the tank is - 20 kPa at 70 °C (atmospheric pressure is 100.5 kPa). The water level in the tank is 2.5 above the pump inlet. The pipe is 1%", schedule 40 with a total length of 12 m. The elbow is standard, and the globe valve is fully open. The flow rate is 95 L/min. FIGURE 13.27 llustration of pump performance for different impeller diameters with net...
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Problem #7(30points! A motor- driven pump reservoir, through a 2500m long, 30 cm ID plastic level in the second re en centrifugal pump delivers 15°C water at the rate of 10m3/min from a pipe, to a second reservoir. The water servoir is 40 m above the water level in the first reservoir. The pump efficiency is 75%. The loss coefficient of the square-edged entrance is 0.5 a) Sketch the problem and locate your point...
water resources
(4) A pump is required to deliver 150 L/s through a 300-mm diameter PVC pipe (smooth pipe) from a well to a reservoir. The water level in the well is 1.5 m below the ground surface and the water surface in the reservoir is 2 m above the ground surface. The delivery pipe is 300 m long, and minor losses can be neglected. A pump manufacturer suggests using a pump with a performance curve given by | HA...
Problem 3. Find the required power to pump 0.1 m/s of liquid. (s = 0,85, v = 10m2/s). The pump is operating at an efficiency n = 0.75 Line 1 : L1 = 10 m, D=0.20 m, f = 0.03, K1 = 0.5, Ky = 1 Line 2: L2 = 500 m, D=0.25 m, f = 0.03, Ke = 0.25, K2 = 2 el 20 m Line 2 el 10 m Line 1 Problem 5. A 20-inch steel pipe that...
(QI) A pump is used to transport castor oil at 25 C to a refinery located 30 m above. The discharge pipe is DN 125 Schedule 40 steel pipe, 56 m long and the flow rate is 1200 liter/min. If the pressure at outlet is 35 psig at the nozzle (at the refinery), the pump head is 75 m, and considering only losses due to friction, compute the pressure at the inlet of the pump. (b) comment on the inlet...
A pump is used to circulate heavy machine tool lubricating oil
(sg = 0.89,v= 2.15X10-3 ft2/s) at 1040 F in a manufacturing plant
as shown below. Total length of the schedule 40 4-in pipe at pump
inlet is 25 ft and 3-in pipe length at pump exit is 75 ft. The
highest point in the system is 22 ft above the pump. For the flow
rate of 50 gpm
(a) Total head loss (ft)
(b) Power loss (HP) due to...