The 28-in-diameter pump in Fig. 11.7a at 1170 r/min is used to pump waterat 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 thepump, how far below the surface should the pump inlet be placed to avoid cavitation?1170 r/min800700=600Total head. It5KHJidia1003)(500 blp200V1216202428U.S. gallons per minute x 1000Fig. 11.7UNPSH,

Answered: The 28-in-diameter pump in Fig. 11.7a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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20. The inlet line of a centrifugal pump is made of 3-nominal schedule 40 commercial steel pipe 2 m long and includes a basket strainer. The pump delivers 81/s of carbon tetrachloride at 70°F. The net positive suction head required by the pump is 1 m of water. Determine where the location of the water level in the tank should be with respect to the pump impeller shaft to prevent cavitation.
What water level H must be maintained in the tank as shown in Fig. P. 3.5.20 to deliver a flow rate of 3. 5 x 10 * m/sec through the pipe ? Take friction factor, f = 0.0295. Water H. D= 25mm, L= 25m Fig. P. 3.5.20
Q1/ liquid is pumped from a ground level reservoir to an overhead tank through a 5 cm ID pipe as shown in Fig. (1): i. What pressure developed by the pump to 45° elbow 8 m Fig. (1) Globe valve Tank 5 m supply water to the tank at the rate of 245 I/min? ii. What is the power required for the pump, if the pump is only 62% efficient? iii. Calculate the available NPSH. If the pump required 12 m NPSH is it suitable to prevent cavitation for this system? why? Given that: u = 0.0016 Pa.s; p 850 kg/m', e/d 0.0035, (Le/d) of Globe valve (open) = 240 (Le/d) of 45° ēlbow = 24 and Pv = 36.6 kPa 25 m 45° Reservoir 45° elbow
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.4
Kindly solve this problem with complete solution so that I can Understand. Correct Final answer: 40.77
2. Water from a reservoir is pump over a hill through a pipe 900mm in diameter and a pressure of one kg/cm² is maintained at the pipe discharge where the pipe is 85m from the pump centerline. The pumps have a positive suction head of 5m. Pumping rate or the pump at 1000 rpm is 1.5m³/sec. Friction losses is equivalent to 3m of head loss. What is the head that should the pump cover for the system?
i need the answer quickly
8.) Assume that the 57 liters per second of oil (P = 860 kg/m3) is pumped through a 300 mm diameter pipeline of cast iron. If each pump produces 685kPa, how far apart can they be placed? (Assume f = 0.031) Answer: 23.718 km Subject: fluid mechanic Lesson: *Conservation of Energy *Fluid Flow in Pipes
Problem 5. Performance curves are available here at three different operating speeds, N = 1750, 2900, and 3500 rpm, for a family of stainless-steel pumps with closed impellers (SSPC1 250 Family) manufactured by American Stainless Pumps . (a) Make three tables (one for each N) at the best efficiency point, BEP, with the following columns: diameter, D (in), flowrate, Q (gpm), head, H₂ (ft), power, Wm (hp), efficiency, np, and specific speed in U.S. customary units, Ns,cu, and dimensionless, Ns. Use Web Plot Digitizer (the first 5 minutes of the tutorial video will show you how it works) to extract the data points for H₂ and at the BEP. (b) Use the scaling laws to produce the same table at N = 2900 rpm from the data at N = 3500 rpm. Briefly discuss the agreement between these two tables. (c) Plot N, versus D for all three values of N on the same figure. Briefly discuss the agreement of the curves.
Pressure difference required for pipe with elevation change. Water at 68°F is to be pumped through 95 ft of standard 3-in. pipe (internal diameter 3.068 in.) into an overhead reservoir as illustrated in Fig. 6A.2. 45° elbow Pump 15 45° elbow 50 -30- Fig. 6A.2 Pipe flow system. (a) What pressure is required at the outlet of the pump to supply water to the overhead reser- voir at a rate of 18 gal/min? At 68°F the viscosity of water is 1.002 cp and the density is 0.9982 g/ml. Q (b) What percentage of the pressure drop (pump the pipe friction? Answer: (a) 15.3 psig outlet F to reservoir) is needed for overcoming X VX Do 8
The value of (NPSH) for a pump is given by the manufacturer as 10 ft. Water is being pumped from a reservoir at min atmospheric pressure at a rate of 30 ft /s to a tank at atmospheric pressure. The water level in the reservoir is 5 ft below the pump. If the total head loss in the suction pipe is 5 ft, is the pump safe from cavitation effects? If a 2-in schedule 40 pipe of 150 m length was used downstream of the pump, what is the power delivered to the fluid? You may assume that the friction factor in the pipe is equal to 0.004.
1400 liters of water is needed to be pumped per minute from a lower reservoir to a higher reservoir as shown in Fig. Q2a. The elevation difference, z2 - zz is 7 m. Wrought iron pipes are used before and after the pump with diameters D1 = 100 mm and D2 = 127 mm Total pipe length of the piping system is 40 m. The length of pipe before the pump is 30 m. The elbows used are flanged smooth 90° bends. The valve is angle valve. Taco Model 4013 FI Series centrifugal pump with the performance curves as shown in Figure Q2(b) is selected. The location of the punmp is 1 m vertically below the lower reservoir and 30 m pipe-length away from the lower reservoir water exit point. (The properties of water: density, p = 997 kg/m³, viscosity, µ= 0.891 ×10³ kg/m.s, vapor pressure, Py = 3.169 kPa) a) Calculate the proper impeller size for this pump. b) Justify that there will be no cavitation. Curve na 2313 Min. Imp Bio. 675 Size 5x4x 12.75 Model 4013 1160 RPM NPSH aco' FI & CI Series 120LAS 20 25 40 45 50…

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