Q8: A form stage centrifugal pump running at 600 rpm is to deliver 1 m'/s of water against a manometrichead of 80 m. The vanes are curved back at 40° to the tangent at outer periphery. The velocity offlow is 25% of the peripheral velocity at outlet. The hydraulic losses are 30% of the velocity head atthe outlet of the impeller. Determine the diameter of the impeller and the manometric efficiency.Ans.: D2 = 0.57 and nm = 87.12%.%3D

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Answered: Q8: A form stage centrifugal pump…

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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Seven hundred gpm of water are being discharged by a centrifugal pump 5 ft. above the pump inlet. The inlet pressure is 4-in Hg above atmospheric and the discharge pressure is 29 psia. Assume the pump input is 8 hp, if the pump has an 8-inch diameter inlet and a 4-inch diameter discharge: 1.How much pressure loss in the pump? a. 28.4 ft-lbf/lb b. 5 ft-lbf/lb c. 4.7 ft-lbf/lb d. 38.1 ft-lbf/lb 2. How much is the velocity loss in the pump? a. 28.4 ft-lbf/lb b. 45.3 ft-lbf/lb c. 4.7 ft-lbf/lb d. 38.1 ft-lbf/lb 3. If the pump speed is increased from 1600 to 2400 rpm, what will be the new net flow rate in the pump? a. 800 gpm b. 1050 gpm c. 1400 gpm d. 1965 gpm 4. Find the new brake horse power if the pump speed in increased from 1600 to 2400 rpm. a. 64 hp b. 20.25 hp c. 8 hp d. 30.375 hp
Please solve it.
18. A centrifugal pump has to work against a head of 25 metres at a speed of 850 rpm. The flow component of the velocity at outlet is 2'5 metreajeccond. The outlet vane angle is 40°. If the discharge of the pump is 0 25 cumeo find (i) The diameter of the impeller and (ii) The width of the impeller at outlet. Neglect losses. (0:387 m; 0'082 m)
B- A three-lobe rotary positive-displacement pump moves 0.45 cm³ of blood in each lobe volume Vlobe. Calculate the volume flow rate of oil for the case where n = 900 грт.
Problem 2: Design a Pelton wheel turbine for a head of 350 m at a speed of 300 rpm. Take the overall efficiency of the wheel as 85% and ratio of jet to the wheel diameter as 1/10. Assume a proper value for the coefficient of velocity, and relationship between the jet and bucket velocities.
An idelaized centrifugal pump, data given as follows; Blade outer radius of blade = 35 mm Power 2 KW Running speed = 2000 rpm Entry of liquid into the pump is axial and exit from the pump is radial with respect to impeller. Determine the mass fow rate of the liquid through the pump?
I need the answer as soon as possible
A multistage centrifugal pump is required to lift 9000 lit/min from a mine, the total head including friction being 500 m. If the speed of the pump is 2900 rpm, if the specific speed per stage is not to be less than 60.The least number of stages, O 10 O 6 . O 14 O 17
Problem-3: A centrifugal pump lifts water against a static head Az = EN m. The pipe setup has a constant diameter of 0.08 m, major losses in the suction side h, = EN3 m and in the discharge side hLD is 3 m. The pump impeller has a diameter of 0.15 m, exit width of 0.015 m, exit blade angle of 22° and speed of N = 20EN rpm. The hydraulic efficiency is 0.85. If the flow at the entrance is radial, find the discharge, pump head, atmospheric pressure Pat, Vapor pressure P, and maximum allowable height of the pump from the feeding tank water surface elevation if the pump is operating under T 25 °C at altitude H= 20EN m. %3D 0, = NPSHR/Hp =1.21×10³N = (P EN=62 Is-mx at-abs-P,)/Y-hLsT -0H, Pa-abs /Y = 10.33(1– 2.256x10-H)56 P,ly = e14.29-3985(T+233.4))
2. A pump is required to draw 50 of water from reservoir A, with static suction lift of 4.5 m to reservoir B, with static discharge head of 15 m. The pipe in the suction line is 6 in nominal diameter and 8 m long. The pipe in the discharge side is 4 in nominal diameter and 15 m long. The fittings and valves installed in the suction line are: one foot valve, one standard elbow and one gate valve; and in the discharge line are: one check valve, one gate valve, two standard elbows. Assuming an absolute roughness of 0.24 mm for a cast iron pipe, and an absolute viscosity of water of 0.01002 poise, and neglecting the head loss in the foot valve and at the exit in the discharge reservoir, determine the pump brake power if the pump efficiency is 82%. Draw the piping system.
Problem1 A two stage centrifugal pump is designed to discharge water at a total head of 70 m with an overall efficiency of 0.76. The pump runs at 2331.6 rpm. The actual head developed (per stage) is 65% of the theoretical head. The flow at the inlet is pure radial. The impeller at the exit has a diameter of D2 = 0.219 m and a width of b, = 0.0216 m. The outlet blade angle is ß2 = 28°. Determine: 1. The flow rate of the pump. 2. The output power of the two stage centrifugal pump. p = 1000kg/m³ g = 9.81 m²/s Take

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